MICROCHIP MCP73841, MCP73842, MCP73843, MCP73844 Technical data

查询MCP73841供应商

M

MCP73841/2/3/4

Advanced Single or Dual Cell Lithium-Ion/

Lithium-Polymer Charge Management Controllers

Features

• Linear Charge Management Controllers

• High-Accuracy Preset Voltage Regulation:

-+

0.5% (max)

• Four Preset Voltage Regulation Options:

- 4.1V - MCP73841-4.1, MCP73843-4.1

- 4.2V - MCP73841-4.2, MCP73843-4.2

- 8.2V - MCP73842-8.2, MCP73844-8.2

- 8.4V - MCP73842-8.4, MCP73844-8.4

• Programmable Charge Current

• Programmable Safety Charge Timers

• Preconditioning of Deeply Depleted Cells

• Automatic End-of-Charge Control

• Optional Continuous Cell Temperature
Monitoring (MCP73841 and MCP73842)

• Charge Status Output for Direct LED Drive

• Automatic Power-Down when Input Power
Removed

• Temperature Range: -40°C to 85°C

• Packaging: MSOP-10 - MCP73841, MCP73842

MSOP-8 - MCP73843, MCP73844

Applications

• Lithium-Ion/Lithium-Polymer Battery Chargers

• Personal Data Assistants

• Cellular Telephones

• Hand-Held Instruments

• Cradle Chargers

• Digital Cameras

• MP3 Players

Typical Application Circuit

1A Lithium-Ion Battery Charger

MA2Q705

5V

10 µF

100 mΩ

100 kΩ

NDS8434

Single

+

1

8

DRVSENSE

2

V

DDVBAT

36

STAT1

4

EN5TIMER

MCP73843

7

V

SS

-

10 µF

0.1 µF

Lithium-Ion
Cell

Description

The MCP7384X family of devices are highly advanced
linear charge management controllers for use in
space-limited, cost-sensitive applications. The
MCP73841 and MCP73842 combine high accuracy,
constant-voltage, constant-current regulation, cell pre­conditioning, cell temperature monitoring, advanced
safety timers, automatic charge termination and
charge status indication in space-saving, 10-pin
MSOP packages. The MCP73841 and MCP73842
provide complete, fully-functional, stand-alone charge
management solutions.

The MCP73843 and MCP73844 employ all the
features of the MCP73841 and MCP73842, with the
exception of the cell temperature monitor. The
MCP73843 and MCP73844 are offered in 8-pin MSOP
packages.

The MCP73841 and MCP73843 are designed for
applications utilizing single-cell Lithium-Ion or Lithium­Polymer battery packs. Two preset voltage regulation
options are available (4.1V and 4.2V) for use with either
coke or graphite anodes. The MCP73841 and
MCP73843 operate with an input voltage range of 4.5V
to 12V.

The MCP73842 and MCP73844 are designed for
applications utilizing dual series cell Lithium-Ion or
Lithium-Polymer battery packs. Two preset voltage
regulation options are available (8.2V and 8.4V). The
MCP73842 and MCP73844 operate with an input
voltage range of 8.7V to 12V.

The MCP7384X family of devices are fully specified
over the ambient temperature range of -40°C to +85°C.

Package Types

10-Pin MSOP

SENSE DRV

V

DD

STAT1

EN

THREF

SENSE

V

DD

STAT1

EN

1
2
3
4

MCP73841

MCP73843

MCP73842

MCP73844

5

8-Pin MSOP

1
2
3
4

10

V

9

8
7

6

8
7
6
5

BAT

V

SS

TIMER
THERM

DRV
V

BAT

V

SS

TIMER

 2004 Microchip Technology Inc. DS21823B-page 1

MCP73841/2/3/4

Functional Block Diagram

90 kΩ

10 kΩ

1kΩ

V

REF

–

Charge

+

Current
Amplifier

Charge
Termination
Comparator

+

-

UVLO
Comparator

+

-

V

UVLO

12 kΩ

I

REG

90 kΩ

10 kΩ

/10

Power-On

Delay

V

DD

SENSE

EN

V

REF

Charge Current
Control Amplif ier

+

–

Precondition

Control

V

DD

Charge_ok

Precon

Voltage Control
Amplifier

+

-

V

REF

Precondition
Comp

.

Constant-Voltage/
Recharge Comp.

V

+

-

+

-

REF

300 kΩ
(825 kΩ)

74.21 kΩ

0.79 kΩ

150.02 kΩ

DRV

V

BAT

THREF

THERM

TIMER

Bias and
Reference
Generator

100 kΩ

50 kΩ

50 kΩ

MCP73841 and MCP73842 Only

Temperature
Comparators

+

-

+

-

V
V

UVLO
REF

(1.2V)

I

REG

Oscillator

/10

Charge Control,

Charge Timers,

And

Status Logic

Drv Stat 1

Charge_ok

5.15 kΩ
(4.29 kΩ)

V

SS

STAT1

DS21823B-page 2  2004 Microchip Technology Inc.

MCP73841/2/3/4

1.0 ELECTRICAL

CHARACTERISTICS

*Notice: Stresses above those listed under “Maximum

Ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the

Absolute Maximum Ratings †

operational listings of this specification is not implied. Expo­sure to maximum rating conditions for extended periods may

VDD.................................................................................13.5V

All inputs and outputs w.r.t. V

................ -0.3 to (VDD+0.3)V

SS

affect device reliability.

Current at DRV Pin ......................................................±4 mA

Current at STAT1 Pin ................................................. ±30 mA

Maximum Junction Temperature, T

............................. 150°C

J

Storage temperature .....................................-65°C to +150°C

ESD protection on all pins:

Human Body Model (1.5 kΩ in Series with 100 pF) .......≥ 2kV

Machine Model (200 pF, No Series Resistance) .............200V

DC CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [V

Typical values are at +25°C, V

DD

= [V

(Typ) + 1V].

REG

Parameters Sym Min Typ Max Units Conditions

Supply Input

Supply Voltage V

DD

MCP73841, MCP73843 4.5 – 12 V

MCP73842, MCP73844 8.7 – 12 V

Supply Current I

UVLO Start Threshold V

SS

START

0.25

–

0.75

4
4

–

MCP73841, MCP73843 4.25 4.45 4.60 V VDD Low-to-High

MCP73842, MCP73844 8.45 8.65 8.90 V V

UVLO Stop Threshold V

STOP

MCP73841, MCP73843 4.20 4.40 4.55 V VDD High-to-Low

MCP73842, MCP73844 8.40 8.60 8.85 V V

Voltage Regulation (Constant-Voltage Mode)

Regulated Output Voltage V

MCP73841-4.1,

REG

4.079 4.1 4.121 V VDD = [V

MCP73843-4.1

MCP73841-4.2,

4.179 4.2 4.221 V V

MCP73843-4.2

MCP73842-8.2,

8.159 8.2 8.241 V V

MCP73844-8.2

MCP73842-8.4,

8.358 8.4 8.442 V V

MCP73844-8.4

/

Line Regulation |(∆V

V

BAT

Load Regulation |∆V

BAT

BAT

)|/∆V

|/V

BAT

– 0.025 0.25 %/V VDD = [V

DD

– 0.01 0.25 % I

Supply Ripple Attenuation PSRR – -58 – dB I

–-42– dBI

–-30– dBI

Output Reverse Leakage
Current

I

DISCHARGE

–0.41 µAVDD Floating, V

Current Regulation (Fast Charge Constant-Current Mode)

Fast Charge Current
Regulation Threshold

V

FCS

100 110 120 mV VDD – V

(Typ)+0.3V] to 12V, TA = -40°C to +85°C.

REG

µAmADisabled

Operating
V

DD

DD

DD

T

= -5°C to +55°C

A

DD

T

= -5°C to +55°C

A

DD

T

= -5°C to +55°C

A

DD

T

= -5°C to +55°C

A

I

OUT

OUT

V

DD

OUT

OUT

OUT

TA = -5°C to +55°C

=V

(Typ)+1V

REG

Low-to-High

High-to-Low

(Typ)+1V], I

REG

= [V

(Typ)+1V], I

REG

= [V

(Typ)+1V], I

REG

= [V

(Typ)+1V], I

REG

(Typ)+1V] to 12V,

REG

= 10 mA

= 10 mA to 150 mA,

= [V

(Typ)+1V]

REG

= 10 mA, 100 Hz

= 10 mA, 1 kHz

= 10 mA, 10 kHz

= V

BAT

SENSE,

OUT

OUT

OUT

OUT

REG

= 10 mA,

= 10 mA,

= 10 mA,

= 10 mA,

(Typ)

 2004 Microchip Technology Inc. DS21823B-page 3

MCP73841/2/3/4

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [V

Typical values are at +25°C, V

Parameters Sym Min Typ Max Units Conditions

Preconditioning Current Regulation (Trickle Charge Constant-Current Mode)

Precondition Current
Regulation Threshold

Precondition Threshold Voltage V

MCP73841-4.1,
MCP73843-4.1

MCP73841-4.2,
MCP73843-4.2

MCP73842-8.2,
MCP73844-8.2

MCP73842-8.4,
MCP73844-8.4

Charge Termination

Charge Termination Threshold V

Automatic Recharge

Recharge Threshold Voltage V

MCP73841,
MCP73843

MCP73842,
MCP73844

External MOSFET Gate Drive

Gate Drive Current I

Gate Drive Minimum Voltage V

Gate - Source Clamp Voltage V

Thermistor Reference - MCP73841, MCP73842

Thermistor Reference Output
Vol tage

Temperature Coefficient TC

Thermistor Reference Source
Current

Thermistor Reference Line
Regulation

Thermistor Reference Load
Regulation

Thermistor Comparator - MCP73841, MCP73842

Upper Trip Threshold V

Upper Trip Point Hysteresis V

Lower Trip Threshold V

Lower Trip Point Hysteresis V

Input Bias Current |I

Status Indicator

Sink Current I

Low Output Voltage V

Input Leakage Current I

DD

= [V

(Typ) + 1V].

REG

V

PCS

PTH

51015mVVDD – V

2.70 2.80 2.90 V V

2.75 2.85 2.95 V V

5.40 5.60 5.80 V V

5.50 5.70 5.90 V V

TCS

RTH

DRV

4710mVV

V

-

V

-

REG

300 mV

V

REG

600 mV

-

200 mV

V

400 mV

REG

REG

-

V

REG

100 mV

V

REG

200 mV

– 2 – mA Sink, CV Mode

– -0.5 – mA Source, CV Mode

DRVMIN

GS

V

THREF

THREF

I

THREF

|(∆V

THREF

V

)|/

THREF

∆V

DD

∆V

THREF

V

THREF

T1

T1HYS

T2

T2HYS

| ––2µA

BIAS

SINK

OL

LK

––1.0VV

-7.0 – -4.5 V VDD = 12.0V

2.475 2.55 2.625 V TA = +25°C, VDD = V

–+50 – ppm/°C

200 – – µA

/

–0.10.25%/VVDD=[V

/

– 0.01 0.10 % I

1.18 1.25 1.32 V

–-50– mV

0.59 0.62 0.66 V

–80– mV

4712mA

– 200 400 mV I

–0.011 µAI

(Typ)+0.3V] to 12V, TA = -40°C to +85°C.

REG

SENSE,

TA = -5°C to +55°C

Low-to-High

BAT

Low-to-High

BAT

Low-to-High

BAT

Low-to-High

BAT

– V

DD

SENSE,

TA = -5°C to +55°C

-

-

VV

VV

High-to-Low

BAT

High-to-Low

BAT

= 4.5V

DD

I

= 0 mA

THREF

REG

= 0 mA to 0.20 mA

THREF

= 1 mA

SINK

= 0 mA, V

SINK

(Typ)+1V] to 12V

STAT1

(Typ)+1V,

REG

= 12V

DS21823B-page 4  2004 Microchip Technology Inc.

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [V

Typical values are at +25°C, V

DD

= [V

(Typ) + 1V].

REG

Parameters Sym Min Typ Max Units Conditions

Enable Input

Input High-Voltage Level V

Input Low-Voltage Level V

Input Leakage Current I

IH

IL

LK

1.4 - – V

–-0.8V

–0.011 µAV

AC CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, all limits apply for V

ical values are at +25°C, V

DD

= [V

(Typ)+1V].

REG

Parameters Sym Min Typ Max Units Conditions

UVLO Start Delay t

START

––5msecV

Current Regulation

Transition Time Out of
Preconditioning

Current Rise Time Out of
Preconditioning

Fast Charge Safety Timer Period t

t

DELAY

t

RISE

FAST

––1msecV

––1msecI

1.2 1.4 1.6 Hours C

Preconditioning Current Regulation

Preconditioning Charge Safety
Timer Period

t

PRECON

50 60 70 Minutes C

Charge Termination

Elapsed Time Termination Period t

TERM

2.5 2.9 3.3 Hours C

Status Indicators

Status Output turn-off t

Status Output turn-on t

OFF

ON

––200µsecI

––200µsecI

DD

= [V

MCP73841/2/3/4

(Typ)+0.3V] to 12V, TA = -40°C to +85°C.

REG

= 12V

ENABLE

(Typ)+0.3V] to 12V, TA = -40°C to +85°C. Typ-

REG

Low-to-High

DD

< V

to V

BAT

PTH

Rising to 90% of I

OUT

= 0.1 µF

TIMER

= 0.1 µF

TIMER

= 0.1 µF

TIMER

= 10 mA to 0 mA

SINK

= 0 mA to 10 mA

SINK

BAT

> V

PTH

REG

TEMPERATURE SPECIFICATIONS

Electrical Specifications: Unless otherwise specified, all limits apply for V

Typical values are at +25°C, V

Parameters Sym Min Typ Max Units Conditions

Temperature Ranges

Specified Temperature Range T

Operating Temperature Range T

Storage Temperature Range T

Thermal Package Resistances

Thermal Resistance, MSOP-10 θ

Thermal Resistance, MSOP-8 θ

DD

= [V

(Typ)+1.0V].

REG

A

A

A

JA

JA

-40 +85 °C

-40 +125 °C

-65 +150 °C

113 °C/W 4-Layer JC51-7 Standard Board,

206 °C/W Single-Layer SEMI G42-88 Board,

DD

= [V

(Typ)+0.3V] to 12V.

REG

Natural Convection

Natural Convection

 2004 Microchip Technology Inc. DS21823B-page 5

MCP73841/2/3/4

2.0 TYPICAL PERFORMANCE CURVES

Note: The graphs and tables provided following this note are a statistical summary based on a limited number of

samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.

Note: Unless otherwise indicated, V

4.203

4.202
+55°C

4.201
+25°C

4.200

(V)

BAT

4.199

V

4.198

-5°C

4.197

4.196

10 100 1000

(mA)

I

OUT

= [V

DD

MCP73841-4.2V

= 5.2 V

V

DD

(Typ) + 1V], I

REG

FIGURE 2-1: Battery Regulation Voltage
(V

) vs. Charge Current (I

BAT

4.203

4.202

4.201

4.200

(V)

BAT

4.199

V

4.198

4.197

4.196

4.5 6.0 7.5 9.0 10.5 12.0

+55°C

+25°C

-5°C

MCP73841-4.2V
I

OUT

= 1000 mA

V

).

OUT

(V)

DD

= 10 mA and TA= +25°C.

OUT

1.40

1.20

1.00

0.80

(mA)

0.60

SS

I

0.40

0.20

0.00
10 100 1000

MCP73841-4.2V

= 5.2 V

V

DD

(mA)

I

OUT

FIGURE 2-4: Supply Current (I
Charge Current (I

1.40

1.20

1.00

0.80

(mA)

0.60

SS

I

0.40

0.20

0.00

+85°C

+25°C

-45°C

4.5 6.0 7.5 9.0 10.5 12.0

).

OUT

MCP73841-4.2V

= 1000 mA

I

OUT

(V)

V

DD

+25°C

+85°C

-45°C

SS

) vs.

FIGURE 2-2: Battery Regulation Voltage

) vs. Supply Voltage (VDD).

(V

BAT

4.203

4.202

4.201

4.200

(V)

BAT

4.199

V

4.198

4.197

4.196

4.5 6.0 7.5 9.0 10.5 12.0

+55°C

+25°C

-5°C

MCP73841-4.2V

= 10 mA

I

OUT

(V)

V

DD

FIGURE 2-3: Battery Regulation Voltage

) vs. Supply Voltage (VDD).

(V

BAT

FIGURE 2-5: Supply Current (I
Supply Voltage (V

1.40

1.20

1.00

0.80

(mA)

0.60

SS

I

0.40

0.20

0.00

4.5 6.0 7.5 9.0 10.5 12.0

).

DD

MCP73841-4.2V
I

OUT

= 10 mA

(V)

V

DD

FIGURE 2-6: Supply Current (I
Supply Voltage (V

DD

).

SS

SS

) vs.

-45°C

+25°C

+85°C

) vs.

DS21823B-page 6  2004 Microchip Technology Inc.

MCP73841/2/3/4

Note: Unless otherwise indicated, V

8.408

8.406

8.404

+55°C

8.402
+25°C

8.400

(V)

8.398

BAT

V

8.396

8.394

-5°C

8.392

8.390

10 100 1000

I

(mA)

OUT

= [V

DD

MCP73842-8.4V

= 9.4 V

V

DD

(Typ) + 1V], I

REG

FIGURE 2-7: Battery Regulation Voltage
(V

) vs. Charge Current (I

BAT

8.408

8.406

8.404

8.402

8.400

(V)

8.398

BAT

V

8.396

8.394

8.392

8.390

8.8 9.2 9.6 10 10.4 10.8 11.2 11.6 12

MCP73842-8.4V
I

+55°C

+25°C

-5°C

= 1000 mA

OUT

V

).

OUT

(V)

DD

= 10 mA and TA= +25°C.

OUT

1.40

1.20

1.00

0.80

(mA)

0.60

SS

I

0.40

0.20

0.00
10 100 1000

MCP73842-8.4V

= 9.4 V

V

DD

(mA)

I

OUT

FIGURE 2-10: Supply Current (I
Charge Current (I

1.40

1.20

1.00

0.80

(mA)

0.60

SS

I

0.40

0.20

0.00

+85°C

+25°C

-45°C

8.8 9.2 9.6 10.0 10.4 10.8 11.2 11.6 12.0

).

OUT

MCP73842-8.4V
I

OUT

= 1000 mA

(V)

V

DD

+25°C

SS

+85°C

-45°C

) vs.

FIGURE 2-8: Battery Regulation Voltage

) vs. Supply Voltage (VDD).

(V

BAT

8.408
MCP73842-8.4V

(V)

BAT

V

8.406

8.404

8.402

8.400

8.398

8.396

8.394

8.392

8.390

= 10 mA +55°C

I

OUT

+25°C

-5°C

8.8 9.2 9.6 10.0 10.4 10.8 11.2 11.6 12.0

(V)

V

DD

FIGURE 2-9: Battery Regulation Voltage

) vs. Supply Voltage (VDD).

(V

BAT

FIGURE 2-11: Supply Current (I
Supply Voltage (V

1.40

1.20

1.00

0.80

(mA)

0.60

SS

I

0.40

0.20

0.00

8.8 9.2 9.6 10.0 10.4 10.8 11.2 11.6 12.0

).

DD

MCP73842-8.4V
I

OUT

= 10 mA

(V)

V

DD

FIGURE 2-12: Supply Current (I
Supply Voltage (V

DD

).

SS

SS

) vs.

-45°C

+25°C

+85°C

) vs.

 2004 Microchip Technology Inc. DS21823B-page 7

MCP73841/2/3/4

Note: Unless otherwise indicated, V

0.45

0.40

0.35

0.30

(µA)

0.25

0.20

0.15

DISCHARGE

I

0.10

0.05

0.00

+85°C

+25°C

-45°C

2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2

MCP73841-4.2V

= Float

V

DD

V

(V)

BAT

DD

= [V

(Typ) + 1V], I

REG

FIGURE 2-13: Output Reverse Leakage
Current (I

2.560

2.558

2.556

2.554

2.552

(V)

2.550

THREF

2.548

V

2.546

2.544

2.542

2.540

DISCHARGE

+85°C

+25°C

-45°C

0 25 50 75 100 125 150 175 200

) vs. Battery Voltage (V

MCP73841-4.2V
V

= 5.2 V

DD

(µA)

I

THREF

BAT

= 10 mA and TA= +25°C.

OUT

0.90

0.80

0.70

0.60

(µA)

0.50

0.40

0.30

DISCHARGE

I

0.20

0.10

0.00

4.0 4.4 4.8 5.2 5.6 6.0 6.4 6.8 7.2 7.6 8.0 8.4

MCP73842-8.4V

= Float

V

DD

V

(V)

BAT

+85°C

+25°C

-45°C

FIGURE 2-16: Output Reverse Leakage

).

Current (I

2.560

2.558

2.556

2.554

2.552

(V)

2.550

THREF

2.548

V

2.546

2.544

2.542

2.540

DISCHARGE

+85°C

+25°C

-45°C

0 25 50 75 100 125 150 175 200

) vs. Battery Voltage (V

MCP73842-8.4V

= 9.4 V

V

DD

(µA)

I

THREF

BAT

).

FIGURE 2-14: Thermistor Reference
Voltage (V
(I

THREF

(V)

THREF

V

).

2.568

2.564

2.560

2.556

2.552

2.548

2.544

2.540

4.5 6.0 7.5 9.0 10.5 12.0

) vs. Thermistor Bias Current

THREF

MCP73841-4.2V

= 100 µA

I

THREF

+85°C

+25°C

-45°C

(V)

V

DD

FIGURE 2-15: Thermistor Reference
Voltage (V

) vs. Supply Voltage (VDD).

THREF

FIGURE 2-17: Thermistor Reference
Voltage (V
(I

THREF

(V)

THREF

V

).

2.568

2.564

2.560

2.556

2.552

2.548

2.544

2.540

8.8 9.2 9.6 10.0 10.4 10.8 11.2 11.6 12.0

) vs. Thermistor Bias Current

THREF

MCP73842-8.4V

= 100 µA

I

THREF

+85°C

+25°C

-45°C

(V)

V

DD

FIGURE 2-18: Thermistor Reference
Voltage (V

) vs. Supply Voltage (VDD).

THREF

DS21823B-page 8  2004 Microchip Technology Inc.

MCP73841/2/3/4

Note: Unless otherwise indicated, V

MCP73841-4.2V

Stepped From 5.2V to 6.2V

V

DD

= 10 mA

I

OUT

= 10 µF, X7R, Ceramic

C

OUT

DD

= [V

V

V

REG

DD

BAT

(Typ) + 1V], I

FIGURE 2-19: Line Transient Response.

MCP73841-4.2V

= 5.2V

V

DD

= 10 µF, X7R, Ceramic

C

OUT

100 mA

10 mA

V

I

BAT

OUT

= 10 mA and TA= +25°C.

OUT

V

DD

V

BAT

MCP73841-4.2V

Stepped From 5.2V to 6.2V

V

DD

I

= 500 mA

OUT

= 10 µF, X7R, Ceramic

C

OUT

FIGURE 2-22: Line Transient Response.

MCP73841-4.2V

= 5.2V

V

DD

= 10 µF, X7R, Ceramic

C

OUT

10 mA

V

BAT

I

OUT500 mA

FIGURE 2-20: Load Transient Response.

0

-10

-20

-30

-40

-50

-60

Attenuation (dB)

-70

MCP73841-4.2V
V

= 5.2 V

DD

VAC = 100 mVp-p
I

= 10 mA

OUT

C

= 10 µF, X7R, CERAMIC

OUT

-80

0.01 0.1 1 10 100 1000

Frequency (kHz)

FIGURE 2-21: Power Supply Ripple
Rejection.

FIGURE 2-23: Load Transient Response.

0

-10

-20

-30

-40

-50

-60

Attenuation (dB)

-70

MCP73841-4.2V
V

= 5.2 V

DD

VAC = 100 mVp-p
I

= 100 mA

OUT

C

= 10 µF, X7R, CERAMIC

OUT

-80

0.01 0.1 1 10 100 1000

Frequency (kHz)

FIGURE 2-24: Power Supply Ripple
Rejection.

 2004 Microchip Technology Inc. DS21823B-page 9

MCP73841/2/3/4

3.0 PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1: PIN DESCRIPTION TABLE

MCP73841,

MCP73842

Pin No.

1 1 SENSE Charge Current Sense Input

22V

3 3 STAT1 Charge Status Output

4 4 EN Logic Enable

5 — THREF Cell Temperature Sensor Bias

6 — THERM Cell Temperature Sensor Input

75TIMERTimer Set

86V

97V

10 8 DRV Drive Output

MCP73843,

MCP73844

Pin No.

Name Function

DD

SS

BAT

Battery Management Input Supply

Battery Management 0V Reference

Battery Voltage Sense

3.1 Charge Current Sense Input
(SENSE)

Charge current is sensed via the voltage developed
across an external precision sense resistor. The sense
resistor must be placed between the supply voltage
(V

) and the external pass transistor (Q1). A 220 mΩ

DD

sense resistor produces a fast charge current of
500 mA, typically.

3.2 Battery Management Input Supply
(VDD)

A supply voltage of [V
recommended. Bypass to V

4.7 µF.

(Typ) + 0.3V] to 12V is

REG

with a minimum of

SS

3.3 Charge Status Output (STAT1)

Current limited, open-drain drive for direct connection
to a LED for charge status indication. Alternatively, a
pull-up resistor can be applied for interfacing to a host
microcontroller.

3.4 Logic Enable (EN)

Input to force charge termination, initiate charge, clear
faults or disable automatic recharge.

3.6 Cell Temperature Sensor Input
(THERM)

Input for an external thermistor for continuous cell­temperature monitoring and pre-qualification. Apply a
voltage equal to 0.85V to disable temperature-sensing.

3.7 Timer Set (TIMER)

All safety timers are scaled by C

TIMER

/0.1 µF.

3.8 Battery Management 0V Reference
(VSS)

Connect to negative terminal of battery.

3.9 Battery Voltage Sense (V

Voltage sense input. Connect to positive terminal of
battery. Bypass to V
ensure loop stability when the battery is disconnected.
A precision internal resistor divider regulates the final
voltage on this pin to V

with a minimum of 4.7 µF to

SS

.

REG

BAT

)

3.10 Drive Output (DRV)

Direct output drive of an external P-channel MOSFET
for current and voltage regulation.

3.5 Cell Temperature Sensor Bias
(THREF)

Voltage reference to bias external thermistor for
continuous cell temperature monitoring and
prequalification.

DS21823B-page 10  2004 Microchip Technology Inc.

MCP73841/2/3/4

4.0 DEVICE OVERVIEW

The MCP7384X family of devices are highly advanced,
linear charge management controllers. Figure 4-1
depicts the operational flow algorithm from charge
initiation to completion and automatic recharge.

4.1 Charge Qualification and
Preconditioning

Upon insertion of a battery or application of an external
supply, the MCP7384X family of devices automatically
perform a series of safety checks to qualify the charge.
The input source voltage must be above the
undervoltage lockout threshold, the enable pin must be
above the logic-high level and the cell temperature
monitor must be within the upper and lower thresholds.
The cell temperature monitor applies to both the
MCP73841 and MCP73842, with the qualification
parameters being continuously monitored. Deviation
beyond the limits automatically suspends or terminates
the charge cycle.

Once the qualification parameters have been met, the
MCP7384X initiates a charge cycle. The charge status
output is pulled low throughout the charge cycle (see
Table 5-1 for charge status outputs). If the battery
voltage is below the preconditioning threshold (V
the MCP7384X preconditions the battery with a trickle­charge. The preconditioning current is set to
approximately 10% of the fast charge regulation
current. The preconditioning trickle-charge safely
replenishes deeply depleted cells and minimizes heat
dissipation in the external pass transistor during the
initial charge cycle. If the battery voltage has not
exceeded the preconditioning threshold before the
preconditioning timer has expired, a fault is indicated
and the charge cycle is terminated.

PTH

4.3 Constant-Voltage Regulation

When the battery voltage reaches the regulation
voltage (V
The MCP7384X monitors the battery voltage at the
V

pin. This input is tied directly to the positive

BAT

terminal of the battery. The MCP7384X is offered in
four fixed-voltage versions for single or dual series cell
battery packs with either coke or graphite anodes:

- 4.1V (MCP73841-4.1, MCP73843-4.1)

- 4.2V (MCP73841-4.2, MCP73843-4.2)

- 8.2V (MCP73842-8.2, MCP73844-8.2)

- 8.4V (MCP73842-8.4, MCP73844-8.4)

), constant-voltage regulation begins.

REG

4.4 Charge Cycle Completion and
Automatic Re-Charge

The MCP7384X monitors the charging current during
the constant-voltage regulation phase. The charge
cycle is considered complete when the charge current
has diminished below approximately 7% of the
regulation current (I
expired.

The MCP7384X automatically begins a new charge
cycle when the battery voltage falls below the recharge

),

threshold (V
parameters are met.

), assuming all the qualification

RTH

) or the elapsed timer has

REG

4.2 Constant-Current Regulation –
Fast Charge

Preconditioning ends and fast charging begins, when
the battery voltage exceeds the preconditioning
threshold. Fast charge regulates to a constant-current,
I

, based on the supply voltage minus the voltage at

REG

the SENSE input (V
an external sense resistor (R
continues until the battery voltage reaches the
regulation voltage (V
expires. In this case, a fault is indicated and the charge
cycle is terminated.

 2004 Microchip Technology Inc. DS21823B-page 11

) developed by the drop across

FCS

); or until the fast charge timer

REG

). Fast charge

SENSE

MCP73841/2/3/4

RTH

UVLO

< V

< V

BAT

DD

V

V

Charge Termination

Charge Current = 0

Reset Safety Timer

STAT1 = Off

No

Ye s

or EN Low

Yes

No

STAT1 = Flashing

Temperature OK

Charge Current = 0

Safety Timer Suspended

Constant-Voltage Phase

REG

Output Voltage = V

< I

I

TERM

OUT

No

Expired

Elapsed Timer

Yes

No

STAT1 = Flashing

No

STAT1 = Off

UVLO

Ye s

> V

Initialize

EN High

DD

V

Note

Charge Current = 0

STAT1 = On

REG

PTH

> V

BAT

V

Yes

Constant-Current

Charge Current = I

Reset Safety Timer

Phase

Yes

Temperature OK

Note

Ye s

No

STAT1 = Flashing

Safety Timer Suspended

REG

No

= V

BAT

V

No

Expired

Safety Timer

Temperature OK

Charge Current = 0

MCP73842.

Ye s

Ye s

and

No

STAT1 = Flashing

No

UVLO

Yes

MCP73841

< V

DD

or EN Low

V

Fault

Charge Current = 0

Reset Safety Timer

No

Yes

Charge Current = 0

No

STAT1 = Flashing

No

Safety Timer Suspended

Expired

Safety Timer

Temperature OK

Ye s

Yes

PREG

PTH

> V

monitored throughout the charge cycle.

Note: The qualification parameters are continuously

Preconditioning Phase

Charge Current = I

Reset Safety Timer

BAT

V

FIGURE 4-1: Operational Flow Algorithm -

 2004 Microchip Technology Inc. DS21823B-page 12

MCP73841/2/3/4

5.0 DETAILED DESCRIPTION

5.1 Analog Circuitry

5.1.1 CHARGE CURRENT SENSE INPUT

(SENSE)

Fast charge current regulation is maintained by the
voltage drop developed across an external sense
resistor (R
following formula calculates the value for R

where:

is the desired fast charge current in amps

I

REG

The preconditioning trickle-charge current and the
charge termination current are scaled to approximately
10% and 7% of I

5.1.2 BATTERY MANAGEMENT INPUT

The VDD input is the input supply to the MCP7384X.
The MCP7384X automatically enters a power-down
mode if the voltage on the V
undervoltage lockout voltage (V
prevents draining the battery pack when the V
supply is not present.

5.1.3 CELL TEMPERATURE SENSOR

A 2.55V voltage reference is provided to bias an
external thermistor for continuous cell temperature
monitoring and pre-qualification. A ratio metric window
comparison is performed at threshold levels of
V
is provided by both the MCP73841 and MCP73842.

THREF

/2 and V

) applied to the SENSE input pin. The

SENSE

V

FCS

DD

------------

=

I

REG

)

input falls below the

DD

). This feature

STOP

R

SENSE

, respectively.

REG

SUPPLY (V

BIAS (THREF)

/4. Cell temperature monitoring

THREF

SENSE

:

DD

For NTC thermistors:

2 R

------------------------------------ ----------

R

=

T1

2 R

------------------------------------ ----------

R

=

T2

R

R

COLD

××

COLDRHOT

–

COLDRHOT

××

COLDRHOT

3 R×

–

HOT

For PTC thermistors:

2 R

------------------------------------ ----------

R

=

T1

2 R

------------------------------------ ----------

R

=

T2

R

R

HOT

××

COLDRHOT

–

HOTRCOLD

××

COLDRHOT

3 R×

–

COLD

where:
R

COLD

and R

are the thermistor resistance

HOT

values at the temperature window of interest.

Applying a voltage equal to 0.85V to the THERM input
disables temperature monitoring.

5.1.5 TIMER SET INPUT (TIMER)

The TIMER input programs the period of the safety
timers by placing a timing capacitor (C
the TIMER input pin and V

. Three safety timers are

SS

programmed via the timing capacitor.

The preconditioning safety timer period:

C

t

PRECON

TIMER

-------------------1.0Hour× s=

0.1µF

The fast charge safety timer period:

C

t

FAST

TIMER

-------------------1.5Hours×=

0.1µF

TIMER

) between

5.1.4 CELL TEMPERATURE SENSOR

INPUT (THERM)

The MCP73841 and MCP73842 continuously monitor
temperature by comparing the voltage between the
THERM input and V
temperature thresholds. A negative or positive
temperature coefficient (NTC or PTC) thermistor and
an external voltage divider typically develop this
voltage. The temperature-sensing circuit has its own
reference, to which it performs a ratio metric
comparison. Therefore, it is immune to fluctuations in
the supply input (V
is removed from the system when V
eliminating additional discharge of the battery pack.

with the upper and lower

SS

). The temperature-sensing circuit

DD

is not applied,

DD

The elapsed time termination period:

C

t

TERM

TIMER

-------------------3.0Hours×=

0.1µF

The preconditioning timer starts after qualification and
resets when the charge cycle transitions to the con­stant-current, fast charge phase. The fast charge and
elapsed timers start once the MCP7384X transitions
from preconditioning. The fast charge timer resets
when the charge cycle transitions to the constant-volt­age phase. The elapsed timer will expire and terminate
the charge if the sensed current does not diminish
below the termination threshold.

Figure 6-1 depicts a typical application circuit with
connection of the THERM input. The resistor values of
R

and RT2 are calculated with the following

T1

equations.

 2004 Microchip Technology Inc. DS21823B-page 13

MCP73841/2/3/4

5.1.6 BATTERY VOLTAGE SENSE (V

The MCP7384X monitors the battery voltage at the
V

pin. This input is tied directly to the positive

BAT

terminal of the battery. The MCP7384X is offered in
four fixed-voltage versions for single or dual series cell
battery packs, with either coke or graphite anodes:

- 4.1V (MCP73841-4.1, MCP73843-4.1)

- 4.2V (MCP73841-4.2, MCP73843-4.2)

- 8.2V (MCP73842-8.2, MCP73844-8.2)

- 8.4V (MCP73842-8.4, MCP73844-8.4)

BAT

)

5.1.7 DRIVE OUTPUT (DRV)

The MCP7384X controls the gate drive to an external
P-channel MOSFET. The P-channel MOSFET is
controlled in the linear region regulating current and
voltage supplied to the cell. The drive output is
automatically turned off when the voltage on the V
input falls below the undervoltage lockout voltage
(V

).

STOP

DD

5.2 Digital Circuitry

5.2.1 CHARGE STATUS OUTPUT (STAT1)

A status output provides information on the state-of­charge. The current-limited, open-drain output can be
used to illuminate an external LED. Optionally, a pull-up
resistor can be used on the output for communication
with a host microcontroller. Table 5-1 summarizes the
state of the status output during a charge cycle.

TABLE 5-1: STATUS OUTPUTS

Charge Cycle State Stat1

Qualification OFF

Preconditioning ON

Constant-Current Fast
Charge

Constant-Voltage ON

Charge Complete OFF

Safety Timer Fault Flashing

(1 Hz, 50% duty cycle)

Cell Temperature Invalid Flashing

(1 Hz, 50% duty cycle)

Disabled - Sleep mode OFF

Battery Disconnected OFF

The flashing rate (1 Hz) is based off a timer capacitor
(C
value of the timer capacitor.

) of 0.1 µF. The rate will vary based on the

TIMER

ON

5.2.2 LOGIC ENABLE (EN)

The logic-enable input pin (EN) can be used to
terminate a charge anytime during the charge cycle,
initiate a charge cycle or initiate a recharge cycle.

Applying a logic-high input signal to the EN pin, or tying
it to the input source, enables the device. Applying a
logic-low input signal disables the device and
terminates a charge cycle. When disabled, the device’s
supply current is reduced to 0.25 µA, typically.

DS21823B-page 14  2004 Microchip Technology Inc.

MCP73841/2/3/4

6.0 APPLICATIONS

The MCP7384X is designed to operate in conjunction
with either a host microcontroller or in stand-alone
applications. The MCP7384X provides the preferred
charge algorithm for Lithium-Ion and Lithium-Polymer

Voltage
Regulated
Wall Cube

Optional
Reverse
Blocking
Diode

R

SENSE

SENSE

V

STAT1

R

T1

THREF

R

T2

DD

EN

cells: constant-current followed by constant-voltage.
Figure 6-1 depicts a typical stand-alone application
circuit, while Figure 6-2 depicts the accompanying
charge profile.

Q

1

DRV

1

2

3

MCP73841

4

5

10

9

8

7

6

V

BAT

V

SS

TIMER

THERM

C

TIMER

Battery

+

-

Pack

FIGURE 6-1: Typical Application Circuit.

Regulation Voltage

(V

REG

Regulation Current

(I

REG

Transition Threshold

(V

PTH

Precondition Current

(I

PREG

Termination Current

(I

TERM

Preconditioning
Phase

)

)

)

)

)

Precondition

Safety Timer

Constant-Current
Phase

Fast Charge
Safety Timer

Charge

Voltage

Elapsed Time

Termination Timer

Constant-Voltage
Phase

Charge

Current

FIGURE 6-2: Typical Charge Profile.

 2004 Microchip Technology Inc. DS21823B-page 15

MCP73841/2/3/4

6.1 Application Circuit Design

Due to the low efficiency of linear charging, the most
important factors are thermal design and cost, which are
a direct function of the input voltage, output current and
thermal impedance between the external P-channel
pass transistor and the ambient cooling air. The worst­case situation occurs when the device has transitioned
from the preconditioning phase to the constant-current
phase. In this situation, the P-channel pass transistor
has to dissipate the maximum power. A trade-off must
be made between the charge current, cost and thermal
requirements of the charger.

6.1.1 COMPONENT SELECTION

Selection of the external components in Figure 6-1 are
crucial to the integrity and reliability of the charging
system. The following discussion is intended to be a
guide for the component selection process.

6.1.1.1 Sense Resistor

The preferred fast charge current for Lithium-Ion cells
is at the 1C rate, with an absolute maximum current at
the 2C rate. For example, a 500 mAh battery pack has
a preferred fast charge current of 500 mA. Charging at
this rate provides the shortest charge cycle times
without degradation to the battery pack performance or
life.

The current sense resistor (R

R

SENSE

=

Where:

is the desired fast charge current.

I

REG

For the 500 mAh battery pack example, a standard

value 220 mΩ, 1% resistor provides a typical fast

charge current of 500 mA and a maximum fast charge
current of 551 mA. Worst-case power dissipation in the
sense resistor is:

PowerDissipation 220 mΩ 551mA

A Panasonic

®

ERJ-6RQFR22V, 220 mW, 1%, 1/8W
resistor in a standard 0805 package is more than
sufficient for this application.

A larger value sense resistor will decrease the fast
charge current and power dissipation in both the sense
resistor and external pass transistor, but will increase
charge cycle times. Design trade-offs must be
considered to minimize space while maintaining the
desired performance.

) is calculated by:

SENSE

V

FCS

------------

I

REG

× 66.8mW==

2

6.1.1.2 External Pass Transistor

The external P-channel MOSFET is determined by the
gate-to-source threshold voltage, input voltage, output
voltage and fast charge current. Therefore, the
selected P-channel MOSFET must satisfy the thermal
and electrical design requirements.

Thermal Considerations

The worst-case power dissipation in the external pass
transistor occurs when the input voltage is at the
maximum and the device has transitioned from the
preconditioning phase to the constant-current phase.
In this case, the power dissipation is:

PowerDissipation V

–()I

DDMAXVPTHMIN

×=

REGMAX

Where:
V

I
V

is the maximum input voltage.

DDMAX

REGMAX

is the maximum fast charge current.
is the minimum transition threshold voltage.

PTHMIN

Power dissipation with a 5V, ±10% input voltage

source, 220 mΩ, 1% sense resistor is:

PowerDissipation 5.5 V 2.75 V–()551 mA× 1.52W==

Utilizing a Fairchild™ NDS8434 or an International
Rectifier IRF7404 mounted on a 1in

2

pad of 2 oz.
copper, the junction temperature rise is 75°C,
approximately. This would allow for a maximum
operating ambient temperature of 75°C.

By increasing the size of the copper pad, a higher
ambient temperature can be realized, or a lower value
sense resistor could be utilized.

Alternatively, different package options can be utilized
for more or less power dissipation. Again, design trade­offs should be considered to minimize size while
maintaining the desired performance.

Electrical Considerations

The gate-to-source threshold voltage and R
external P-channel MOSFET must be considered in the
design phase.

The worst-case V

provided by the controller occurs

GS

when the input voltage is at the minimum and the fast
charge current regulation threshold is at the maximum.
The worst-case V

V

GSVDRVMAXVDDMINVFCSMAX

GS

is:

Where:
V

DRVMAX

V
V

DDMIN

V

FCSMAX

is the maximum sink voltage at the

output

DRV

is the minimum input voltage source

is the maximum fast charge current

regulation threshold

DSON

)–(–=

of the

DS21823B-page 16  2004 Microchip Technology Inc.

MCP73841/2/3/4

Worst-case VGS with a 5V, ±10% input voltage source
and a maximum sink voltage of 1.0V is:

V

1.0 V 4.5V 120 mV–()–3.38V–==

GS

At this worst-case (V

) the R

GS

of the MOSFET

DSON

must be low enough as to not impede the performance
of the charging system. The maximum allowable
R

at the worst-case VGS is:

DSON

R

DSON

V

R

DSON

-------------------------------------- ------------- ------------- ------------- --

=

4.5V 120 115()mV– 4.221V–

----------------------------------- ------------- ------------- ------------

– V

DDMINVFCSMAX

I

REGMAX

551 581()mA

–

BATMAX

288mΩ==

The Fairchild NDS8434 and International Rectifier
IRF7404 both satisfy these requirements.

6.1.1.3 EXTERNAL CAPACITORS

The MCP7384X are stable with or without a battery
load. In order to maintain good AC stability in the
Constant-Voltage mode, a minimum capacitance of

4.7 µF is recommended to bypass the V

pin to VSS.

BAT

This capacitance provides compensation when there is
no battery load. Additionally, the battery and
interconnections appear inductive at high frequencies.
These elements are in the control feedback loop during
Constant-Voltage mode. Therefore, the bypass
capacitance may be necessary to compensate for the
inductive nature of the battery pack.

Virtually any good quality output filter capacitor can be
used, independent of the capacitor’s minimum ESR
(Effective Series Resistance) value. The actual value of
the capacitor and its associated ESR depends on the
forward transconductance (g

) and capacitance of the

m

external pass transistor. A 4.7 µF tantalum or
aluminum electrolytic capacitor at the output is usually
sufficient to ensure stability for up to a 1A output
current.

6.1.1.5 ENABLE INTERFACE

In the stand-alone configuration, the enable pin is
generally tied to the input voltage. The MCP7384X
automatically enters a Low-power mode when voltage
on the V
voltage (V

input falls below the undervoltage lockout

DD

), reducing the battery drain current to

STOP

0.4 µA, typically.

6.1.1.6 CHARGE STATUS INTERFACE

A status output provides information on the state of
charge. The current-limited, open-drain output can be
used to illuminate an external LED. Refer to Table 5-1
for a summary of the state of the status output during a
charge cycle.

6.2 PCB Layout Issues

For optimum voltage regulation, place the battery pack
as close as possible to the device’s V
This is recommended to minimize voltage drops along
the high current-carrying PCB traces.

If the PCB layout is used as a heatsink, adding many
vias around the external pass transistor can help
conduct more heat to the back plane of the PCB, thus
reducing the maximum junction temperature.

and VSS pins.

BAT

6.1.1.4 REVERSE-BLOCKING PROTECTION

The optional reverse-blocking protection diode,
depicted in Figure 6-1, provides protection from a
faulted or shorted input, or from a reversed-polarity
input source. Without the protection diode, a faulted or
shorted input would discharge the battery pack through
the body diode of the external pass transistor.

If a reverse-protection diode is incorporated into the
design, it should be chosen to handle the fast charge
current continuously at the maximum ambient
temperature. In addition, the reverse-leakage current
of the diode should be kept as small as possible.

 2004 Microchip Technology Inc. DS21823B-page 17

MCP73841/2/3/4

7.0 PACKAGING INFORMATION

7.1 Package Marking Information

8-Lead MSOP (MCP73843, MCP73844)

XXXXX

YWWNNN

10-Lead MSOP (MCP73841, MCP73842)

XXXXX

YYWWNNN

Example:

738431

0319256

Example:

738411

0319256

Legend: XX...X Customer specific information*

YY Year code (last 2 digits of calendar year)
WW Week code (week of January 1 is week ‘01’)
NNN Alphanumeric traceability code

Note: In the event the full Microchip part number cannot be marked on one line, it will

be carried over to the next line thus limiting the number of available characters
for customer specific information.

* Standard marking consists of Microchip part number, year code, week code, and traceability code.

DS21823B-page 18  2004 Microchip Technology Inc.

8-Lead Plastic Micro Small Outline Package (MS) (MSOP)

E

E1

p

D

2

B

n 1

MCP73841/2/3/4

α

A

c

(F)

β

Units

A1

E1

MIN

n
p

A

E

D
L

φ

c

B

α
β

.026 BSC

.030
.000

.193 TYP.
.118 BSC
.118 BSC

.016 .024

.037 REFFFootprint (Reference)

0° - 8°
.003
.009

5°

5° -

Dimension Limits
Number of Pins
Pitch
Overall Height
Molded Package Thickness
Standoff
Overall Width
Molded Package Width
Overall Length
Foot Length

Foot Angle
Lead Thickness
Lead Width
Mold Draft Angle Top
Mold Draft Angle Bottom

*Controlling Parameter
Notes:

Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not
exceed .010" (0.254mm) per side.

JEDEC Equivalent: MO-187

Drawing No. C04-111

A2

L

INCHES

NOM

.033

.006
.012

φ

A1

MAX NOM

8

--

.043
.037
.006

-

.031

.009

.016

-

15°
15°

MIN

0.75

0.00

0.40

0.08

0.22

MILLIMETERS*

MAX

8

0.65 BSC

--

0.85

-

4.90 BSC

3.00 BSC

3.00 BSC

0.60

0.95 REF

0°

-

-

-

A2

1.10

0.95

0.15

0.80

8°

0.23

0.40
15°5° ­15°5° -

 2004 Microchip Technology Inc. DS21823B-page 19

MCP73841/2/3/4

10-Lead Plastic Micro Small Outline Package (UN) (MSOP)

E

E1

p

D

B

n

2

1

c

(F)

β

Number of Pins

Dimension Limits

Pitch
Overall Height
Molded Package Thickness
Standoff
Overall Width
Molded Package Width
Overall Length
Foot Length

Foot Angle
Lead Thickness
Lead Width
Mold Draft Angle Top
Mold Draft Angle Bottom

*Controlling Parameter
Notes:

Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not
exceed .010" (0.254mm) per side.

JEDEC Equivalent: MO-187

Drawing No. C04-021

Units

MIN
n
p

A

A2
A1

E

E1

D

L

φ

c

B

α
β

φ

L

L1

INCHES

NOM

.020 TYP

-­.030
.000

.016 .024

0° - 8°
.003
.006

5° -

5° -

.033

.193 BSC
.118 BSC
.118 BSC

.037 REFFFootprint

.009

A

A1

.031

15°
15°

MINMAX

0.75

0.00

0.40

0.08

0.15

10

.043
.037

-

.006

-

.009
.012

A2

MILLIMETERS*

NOM

0.50 TYP.

--

0.85

4.90 BSC

3.00 BSC

3.00 BSC

0.60

0.95 REF

0.23
5° 15°
5° 15°

MAX

10

1.10

0.95

-

0.15

0.80

-

0.23

-

0.30

-

-

α

8°0°

DS21823B-page 20  2004 Microchip Technology Inc.

PRODUCT IDENTIFICATION SYSTEM

MCP73841/2/3/4

To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office

PART NO. X XX

Device

XXX

Preset

Voltag e

Range

PackageTempe rat ure

Options

Device MCP73841: Single-cell charge controller with temperature

MCP73841T: Single-cell charge controller with temperature

MCP73842: Dual series cells charge controller with tem-

MCP73842T: Dual series cells charge controller with tem-

MCP73843: Single-cell charge controller
MCP73843T: Single-cell charge controller, Tape and Reel
MCP73844: Dual series cells charge controller
MCP73844T: Dual series cells charge controller,

Preset Voltage
Regulation Options

Tem perature Range I = -40°C to +85°C (Industrial)

Package MS = Plastic Micro Small Outline (MSOP), 8-lead

410 = 4.1V
420 = 4.2V
820 = 8.2V
840 = 8.4V

UN = Plastic Micro Small Outline (MSOP), 10-lead

monitor

monitor, Tape and Reel

perature monitor

perature monitor, Tape and Reel

Ta pe and Reel

Examples:

a) MCP73841-410I/UN: 4.1V Preset Voltage
b) MCP73841T-410I/UN: 4.1V Preset Voltage,

c) MCP73841-420I/UN: 4.2V Preset Voltage
d) MCP73841T-420I/UN: 4.2V Preset Voltage,

a) MCP73842-820I/UN: 8.2V Preset Voltage
b) MCP73842T-820I/UN: 8.2V Preset Voltage,

c) MCP73842-840I/UN: 8.4V Preset Voltage
d) MCP73842T-840I/UN: 8.4V Preset Voltage,

a) MCP73843-410I/MS: 4.1V Preset Voltage
b) MCP73843T-410I/MS: 4.1V Preset Voltage,

c) MCP73843-420I/MS: 4.2V Preset Voltage
d) MCP73843T-420I/MS: 4.2V Preset Voltage,

a) MCP73844-820I/MS: 8.2V Preset Voltage
b) MCP73844T-820I/MS: 8.2V Preset Voltage,

c) MCP73844-840I/MS: 8.4V Preset Voltage
d) MCP73844T-840I/MS: 8.4V Preset Voltage,

.

Tape and Reel

Tape and Reel

Tape and Reel

Tape and Reel

Tape and Reel

Tape and Reel

Tape and Reel

Tape and Reel

Sales and Support

Data Sheets

Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and
recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:

1. Your local Microchip sales office

2. The Microchip Corporate Literature Center U.S. FAX: [phone]

3. The Microchip Worldwide Site (www.microchip.com)

Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.

Customer Notification System

Register on our web site (www.microchip.com/cn) to receive the most current information on our products.

 2004 Microchip Technology Inc. DS21823B-page 21

MCP73841/2/3/4

NOTES:

DS21823B-page 22  2004 Microchip Technology Inc.

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical
components in life support systems is not authorized except
with express written approval by Microchip. No licenses are
conveyed, implicitly or otherwise, under any intellectual
property rights.

Trademarks

The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, K

EELOQ

, MPLAB, PIC, PICmicro, PICSTART,
PRO MATE, PowerSmart and rfPIC are registered
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.

AmpLab, FilterLab, microID, MXDEV, MXLAB, PICMASTER,
SEEVAL, SmartShunt and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.

Application Maestro, dsPICDEM, dsPICDEM.net,
dsPICworks, ECAN, ECONOMONITOR, FanSense,
FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP,
ICEPIC, Migratable Memory, MPASM, MPLIB, MPLINK,
MPSIM, PICkit, PICDEM, PICDEM.net, PICtail, PowerCal,
PowerInfo, PowerMate, PowerTool, rfLAB, Select Mode,
SmartSensor, SmartTel and Total Endurance are trademarks
of Microchip Technology Incorporated in the U.S.A. and other
countries.

Serialized Quick Turn Programming (SQTP) is a service mark
of Microchip Technology Incorporated in the U.S.A.

All other trademarks mentioned herein are property of their
respective companies.

© 2004, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.

Printed on recycled paper.

Microchip received ISO/TS-16949:2002 qu ality system certification for
its worldwide hea dquarters, design and wafer fabricati on facilities in
Chandler an d Tempe, Arizona and Mountain View, Californ ia in October

2003. The Company’s quality system processes and procedures are for
its PICmicro
EEPROMs, microperipherals, nonvolatile memory and analog
products. In addition, Microchip’s quality system for the design and
manufacture of development systems is ISO 9001:2000 certified.

®

8-bit MCUs, KEEL

®

code hopping devices, Serial

OQ

 2004 Microchip Technology Inc. DS21823B-page 23

M

W

ORLDWIDE SALES AND SERVICE

AMERICAS

Corporate Office

2355 West Chandler B lvd.
Chandler, AZ 85224-6199
Tel: [phone]
Fax: [phone]
Technical Support: 480-792-7627
Web Address: http://www.microchip.com

Atlanta

3780 Mansell Road, Suite 130
Alpharetta, GA 30022
Tel: [phone]
Fax: [phone]

Boston

2 Lan Drive, Suit e 120
Westford, MA 01886
Tel: [phone]
Fax: [phone]

Chicago

333 Pierce Road, S uite 180
Itasca, IL 60143
Tel: [phone]
Fax: [phone]

Dallas

4570 Westgrove Drive, Suite 160
Addison, TX 75001
Tel: [phone]
Fax: [phone]

Detroit

Tri-Atria Office Building
32255 Northwestern Highway, Suite 190
Farmington Hills, MI 48334
Tel: [phone]
Fax: [phone]

Kokomo

2767 S. Albright Road
Kokomo, IN 46902
Tel: [phone]
Fax: [phone]

Los Angeles

18201 Von Karman, Suite 10 90
Irvine, CA 92612
Tel: [phone]
Fax: [phone]

San Jose

1300 Terra Bella Avenue
Mountain View, CA 94043
Tel: [phone]
Fax: [phone]

Toro nto

6285 Northam Drive, Suite 108
Mississauga, Ontario L4V 1X5, Canada
Tel: [phone]
Fax: [phone]

ASIA/PACIFIC

Australia

Suite 22, 41 Rawson Street
Epping 2121, NSW
Australia
Tel: [phone]
Fax: [phone]

China - Beijing

Unit 706B
Wan Tai Bei Hai Bldg.
No. 6 Chaoyangmen Bei Str.
Beijing, 100027, China
Tel: [phone]
Fax: [phone]

China - Chengdu

Rm. 2401-2402, 24 th Floor,
Ming Xing Financial Tower
No. 88 TIDU Street
Chengdu 610016, China
Tel: [phone]
Fax: [phone]

China - Fuzhou

Unit 28F, World Trade Plaza
No. 71 Wusi Road
Fuzhou 350001, China
Tel: [phone]
Fax: [phone]

China - Hong Kong SAR

Unit 901-6, Tower 2, Metroplaza
223 Hing Fong Ro ad
Kwai Fong, N.T., Hong Kong
Tel: [phone]
Fax: [phone]

China - Shanghai

Room 701, Bldg. B
Far East International Plaza
No. 317 Xian Xia Road
Shanghai, 200051
Tel: [phone]
Fax: [phone]

China - Shenzhen

Rm. 1812, 18/F, Building A, United Plaza
No. 5022 Binhe Roa d, Futian District
Shenzhen 518033, China
Tel: [phone]
Fax: [phone]

China - Shunde

Room 401, Hongjian Building, No. 2
Fengxiangnan Road, Ronggui Town, Shunde
District, Foshan City, Guangdong 528303, China
Tel: [phone] Fax: [phone]

China - Qingdao

Rm. B505A, Fullhope Plaza,
No. 12 Hong Kong Central Rd.
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Tel: [phone] Fax: [phone]

India

Divyasree Chamb ers
1 Floor, Wing A (A3/A4)
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Tel: [phone] Fax: [phone]

Japan

Benex S-1 6F
3-18-20, Shinyokohama
Kohoku-Ku, Yokohama-shi
Kanagawa, 222-0033, Japan
Tel: [phone] Fax: [phone]

Korea

168-1, Youngbo Bldg. 3 Floor
Samsung-Dong, Kangnam-Ku
Seoul, Korea 135-882
Tel: [phone] Fax: [phone] or
82-2-558-5934

Singapore

200 Middle Road
#07-02 Prime Cen tre
Singapore, 188980
Tel: [phone] Fax: [phone]

Taiw an

Kaohsiung Branch
30F - 1 No. 8
Min Chuan 2nd Road
Kaohsiung 806, Taiwan
Tel: [phone]
Fax: [phone]

Taiw an

Taiwan Branch
11F-3, No. 207
Tung Hua North Road
Taipei, 105, Taiwan
Tel: [phone] Fax: [phone]

EUROPE

Austria

Durisolstrasse 2
A-4600 Wels
Austria
Tel: [phone]
Fax: [phone]

Denmark

Regus Business Centre
Lautrup hoj 1-3
Ballerup DK-2750 Denmark
Tel: [phone] Fax: [phone]

France

Parc d’Activite du M oulin de Massy
43 Rue du Saule Trapu
Batiment A - ler Etage
91300 Massy, France
Tel: [phone]
Fax: [phone]

Germany

Steinheilstrasse 10
D-85737 Ismaning, Germany
Tel: [phone]
Fax: [phone]

Italy

Via Quasimodo, 12
20025 Legnano (MI)
Milan, Italy
Tel: [phone]
Fax: [phone]

Netherlands

P. A. De Biesbosch 14
NL-5152 SC Drunen, Netherlands
Tel: [phone]
Fax: [phone]

United Kingdom

505 Eskdale Road
Winnersh Triangle
Wokingham
Berkshire, England RG41 5TU
Tel: [phone]
Fax: [phone]

02/17/04

DS21823B-page 24  2004 Microchip Technology Inc.