MCP73861/2/3/4
Advanced Single or Dual Cell, Fully Integrated Li-Ion /
Li-Polymer Charge Management Controllers
Features
• Linear Charge Management Controllers
- Integrated Pass Transistor
- Integrated Current Sense
- Reverse-Blocking Protection
• High-Accuracy Preset V olt age Regulat ion: +
0.5%
• Four Selectable Voltage Regulation Options:
- 4.1V, 4.2V – MCP73861/3
- 8.2V, 8.4V – MCP73862/4
• Programmable Charge Current: 1.2A Maximum
• Programmable Safety Charge Timers
• Preconditioning of Deeply Depleted Cells
• Automatic End-of-Charge Control
• Optional Continuous Cell Temperature Monitoring
• Charge Status Output for Direct LED Drive
• Fault Output for Direct LED Drive
• Automatic Power-Down
• Thermal Regulation
• Temperature Range: -40°C to +85°C
• Packaging: 16-Pin, 4 x 4 QFN
16-Pin SOIC
Applications
• Lithium-Ion/Lithium-Polymer Battery Chargers
• Personal Data A ssistants (PDAs)
• Cellular Telep hon es
• Hand-Held Instruments
• Cradle Chargers
•Digital Cameras
• MP3 Players
Package Types
Description
The MCP7386X family of devices are h ighly ad vanced
linear charge management controllers for use in spacelimited, cost-sensiti ve applications. The devices combine high-accuracy, constant voltage and current r egulation, cell preconditioning, cell temperature monitoring,
advanced safety timers , automatic charge t ermination,
internal current sensing, reverse-blocking protection,
charge status and fault indication in either a spacesaving 16-pin, 4 x 4 QFN or 16-pin SOIC package. The
MCP7386X provides a complete, fully-functional, standalone charge management solution with a minimum
number of external components.
The MCP73861/3 is intended for applications utilizing
single-cell Lithium-Ion or Lithium-Polymer battery
packs, while the MCP73862/4 is intended for dual
series cell Lithium-Ion or Lithium-Polymer battery
packs. The MCP73861/3 have two selectable voltageregulation options available (4.1V and 4.2V), for use
with either coke or graphite anode s and operate wi th an
input voltage range of 4.5V to 12V. The MCP73862/4
have two selectable voltage-regulation options available (8.2V and 8.4V), for use with coke or graphite
anodes, and operate with an input voltage range of
8.7V to 12V.
The only difference between the MCP73861/2 and
MCP73863/4, respectivel y , is the function of the charge
status output (STAT1) when a charge cycle has been
completed. The MCP73861/2 flash the output, while
the MCP73863/4 turn the output off. Refer to
Section 5.2.1 “Charge Status Outputs
(STAT1,STAT2)”.
The MCP7386X family of devices are fully specified
over the ambient temperature range of -40°C to +85°C.
16-Pin SOIC16-Pin QFN
SS2
V
STAT1
V
1
SET
V
2
DD1
V
3
DD2
V
4
SS1
5678
PROG
© 2005 Microchip Technology Inc. DS21893C-page 1
EN
STAT2
141516
MCP73861
MCP73862
MCP73863
MCP73864
THREF
THERM
13
12
V
BAT3
11
V
BAT2
10
V
BAT1
V
9
SS3
TIMER
STAT2 1
STAT1
2
V
3
SET
V
4
DD1
V
5
DD2
V
SS1
PROG
THREF
MCP73861
MCP73862
6
7
89
MCP73863
16
15
14
13
12
MCP73864
11
10
EN
V
SS2
V
BAT3
V
BAT2
V
BAT1
V
SS3
TIMER
THERM
MCP73861/2/3/4
Typical Application
1.2A Lithium-Ion Battery Charger
5V
4.7µF
Functional Block Diagram
Direction
G = 0.001
Charge
Ter mination
Comparator
+
–
+
–
V
UVLO
Control
1kΩ
11 kΩ
10 kΩ
I
/12
REG
U
VLO
COMPARATOR
V
90
kΩ
Power-On
Delay
V
DD1
V
DD2
PROG
EN
110 kΩ
10 kΩ
V
REF
2, 3
V
1
V
14
EN
16
STAT1
15
STAT2
5
PROG
MCP73861/3
REF
Charge Current
Control Amplifier
+
–
Precondition
Control
DD
SET
V
BAT3
V
BAT
THREF
THERM
TIMER
V
SS
V
12
10, 11
6
7
8
4, 9, 13
DD
6.19 kΩ
7.32 kΩ
Voltage Control
Amplifier
Charge_OK
Precon
4.7 µF
0.1
µF
+
–
V
REF
Precondition
Comp.
Constant-Voltage/
Recharge Comp.
Single
+
Lithium-Ion
–
Cell
+
–
+
–
V
REF
4kΩ
600 kΩ
(1.65 MΩ)
148.42 kΩ
1.58 kΩ
300.04 kΩ
V
BAT1
V
BAT2
V
BAT3
Values in ( )
reflect the
MCP73862/4
devices
V
Bias and
Reference
Generator
V
UVLO
REF
(1.2V)
V
SET
10.3 kΩ
THREF
THERM
TIMER
100 kΩ
50 kΩ
50 kΩ
Temperature
Comparators
+
–
+
–
I
REG
Oscillator
/12
Charge Control,
Charge Timers
And Status Logic
(8.58 kΩ)
Drv Stat 1
Drv Stat 2
Charge_OK
V
SS1
V
SS2
V
SS3
STAT1
STAT2
DS21893C-page 2 © 2005 Microchip Technology Inc.
MCP73861/2/3/4
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 condit ions fo r ext ended pe riods
V
..............................................................................13.5V
DDN
, V
V
BATN
, EN, ST AT1, STAT2 w.r.t. V
SET
SS
.................................................................-0.3 to (V
PROG, THREF, THERM, TIMER w.r.t. V
Maximum Junction Te m perature, T
..............-0.3 to 6V
SS
............Internally Limited
J
DD
+ 0.3)V
may affect device reliability.
Storage temperature.....................................-65°C to +150°C
ESD protection on all pins:
Human Body Model (1.5 kΩ in series with 100 pF)....≥ 4kV
Machine Model (200 pF, No series resistance) ...........300V
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [V
= -40°C to +85°C. Typical values are at +25°C, V
T
A
DD
= [V
REG
(typ.) + 1.0V]
Parameters Sym Min Typ Max
Supply Input
Supply Voltage V
DD
4.5 — 12 V MCP73861/3
8.7 — 12 V MCP73862/4
Supply Current I
SS
— 0.17 4 µA Disabled
— 0.53 4 mA Operating
UVLO Start Threshold V
START
4.25 4.5 4.65 V MCP73861/3
8.45 8.8 9.05 V MCP73862/4
UVLO Stop Threshold V
STOP
4.20 4.4 4.55 V MCP73861/3
8.40 8.7 8.95 V MCP73862/4
Voltage Regulation (Constant-Voltage Mode)
Regulated Output Voltage V
REG
4.079 4.1 4.121 V MCP73861/3, V
4.179 4.2 4.221 V MCP73861/3, V
8.159 8.2 8.241 V MCP73862/4, V
8.358 8.4 8.442 V MCP73862/4, V
Line Regulation |(ΔV
Load Regulation |ΔV
BAT/VBAT
| /ΔV
DD
BAT/VBAT
)
| — 0.01 0.25 % I
— 0.025 0.25 %/V V
Supply Ripple Attenuation PSRR — 60 — dB I
—42—dBI
—28—dBI
Output Reverse-Leakage
Current
I
DISCHARGE
—0.23 1µAV
Current Regulation (Fast Charge Constant- Current Mode)
Fast Charge Current
Regulation
I
REG
85 100 115 mA PROG = OPEN
1020 1200 1380 mA PROG = V
425 500 575 mA PROG = 1.6 kΩ
(typ.) + 0.3V] to 12V,
REG
Unit
s
Conditions
Low-to-High
V
DD
High-to-Low
V
DD
SET
SET
SET
SET
V
= [V
DD
I
OUT
T
= -5°C to +55°C
A
DD
I
OUT
OUT
V
DD
OUT
OUT
10 kHz
OUT
DD
= -5°C to +55°C
T
A
(typ.) + 1V],
REG
=10mA
= [V
(typ.)+1V] to 12V
REG
= 10 mA
= 10 mA to 150 mA
= [V
(typ.)+1V]
REG
= 10 mA, 10 Hz to 1 kHz
= 10 mA, 10 Hz to
= 10 mA, 10 Hz to 1 MHz
< V
= V
BAT
REG
SS
= V
= V
= V
= V
(typ.)
SS
DD
SS
DD
© 2005 Microchip Technology Inc. DS21893C-page 3
MCP73861/2/3/4
DC CHARACTERISTICS (Continued)
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [V
= -40°C to +85°C. Typical values are at +25°C, V
T
A
Parameters Sym Min Typ Max
Preconditioning Curre nt Regulation (T r ickle Charge Constant-Current Mode)
Precondition Current
I
PREG
Regulation
Precondition Threshold
Voltage
V
PTH
Charge Termination
Charge Termination
Current
I
TERM
Automatic Recharge
Recharge Threshold
V
RTH
Voltage
Thermistor Reference
Thermistor Reference
V
THREF
Output Voltage
Thermistor Reference
I
THREF
Source Current
Thermistor Reference Line
Regulation
Thermistor Reference Load
Regulation
|(ΔV
HREF
|ΔV
THREF/VT
)|/
ΔV
DD
THREF/VT
HREF|
Thermistor Comparator
Upper Trip Threshold V
Upper Trip Point Hysteresis V
Lower Trip Threshold V
Lower Trip Point Hysteresis V
Input Bias Current I
T1
T1HYS
T2
T2HYS
BIAS
Status Indicator – STAT1, STAT2
Sink Current I
Low Output Voltage V
Input Leakage Current I
SINK
OL
LK
Enable Input
Input High Voltage Level V
Input Low Voltage Level V
Input Leakage Current I
IH
IL
LK
= [V
DD
(typ.) + 1.0V]
REG
5 10 15 mA PROG = OPEN
60 120 180 mA PROG = V
25 50 75 mA PROG = 1.6 kΩ
2.70 2.80 2.90 V MCP73861/3, V
2.75 2.85 2.95 V MCP73861/3, V
5.40 5.60 5.80 V MCP73862/4, V
5.50 5.70 5.90 V MCP73862/4, V
6 8.5 11 mA PROG = OPEN
70 90 120 mA PROG = V
32 41 50 mA PROG = 1.6 kΩ
V
REG
300 mV
V
REG
600 mV
-
-
V
REG
200 mV
V
REG
400 mV
-
V
-
2.475 2.55 2.625 V TA = 25°C,
200 — — µA
— 0.1 0.25 %/V V
0.01 0.10 % I
1.18 1.25 1.32 V
—-50—mV
0.59 0.62 0.66 V
—80—mV
—— 2μA
4812mA
— 200 400 mV I
—0.01 1μAI
1.4 — — V
——0.8V
—0.01 1μAV
(typ.) + 0.3V] to 12V,
REG
Unit
s
T
A
V
BAT
T
A
-100 mV V MCP73861/3
REG
V
-
REG
V MCP73862/4
200 mV
V
BAT
V
DD
I
THREF
DD
12V
THREF
SINK
SINK
ENABLE
Conditions
SS
=-5°C to +55°C
Low-to-High
SS
=-5°C to +55°C
High-to-Low
= V
(typ.) + 1V,
REG
= 0 mA
= [V
(typ.) + 1V] to
REG
= 0 mA to 0.20 mA
= 1 mA
= 0 mA, V
STAT1,2
= 12V
SET
SET
SET
SET
= V
= V
= V
= V
SS
DD
SS
DD
= 12V
DS21893C-page 4 © 2005 Microchip Technology Inc.
DC CHARACTERISTICS (Continued)
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [V
= -40°C to +85°C. Typical values are at +25°C, V
T
A
DD
= [V
REG
(typ.) + 1.0V]
Parameters Sym Min Typ Max
Thermal Shutdow n
Die Temperature T
Die Temperature
T
Hysteresis
SD
SDHYS
— 155 — °C
—10—°C
AC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits apply for V
= -40°C to +85°C. Typical values are at +25°C, V
T
A
DD
= [V
(typ.) + 1.0V]
REG
Parameters Sym Min Typ Max Units Conditions
UVLO Start Delay t
START
—— 5 msVDD Low-to-High
Current Regulation
Transition Time Out of
t
DELAY
—— 1 msV
Preconditioning
Current Rise Time Out of
t
RISE
—— 1 msI
Preconditioning
Fast Charge Safety Timer
Period
t
FAST
1.1 1.5 1.9 Hours C
Preconditioning Current Regulation
Preconditioning Charge Safety
Timer Period
t
PRECON
45 60 75 Minutes C
Charge Termination
Elapsed Time Termination
Period
t
TERM
2.2 3 3.8 Hours C
Status Indicators
Status Output turn-off t
Status Output turn-on t
OFF
ON
— — 200 µs I
— — 200 µs I
DD
MCP73861/2/3/4
(typ.) + 0.3V] to 12V,
REG
= [V
Unit
s
(typ.) + 0.3V ] to 1 2 V,
REG
< V
BAT
Rising to 90% of I
OUT
TIMER
TIMER
TIMER
= 1mA to 0mA
SINK
= 0mA to 1mA
SINK
PTH
= 0.1 µF
= 0.1 µF
= 0.1 µF
to V
Conditions
> V
BAT
PTH
REG
TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, all limits apply for V
Typical values are at +25°C, V
DD
= [V
(typ.) + 1.0V]
REG
Parameters Sym Min Typ Max Units Conditions
Temperature Ranges
Specified Temperature Range T
Operating Temperature Range T
Storage Temperature Range T
A
J
A
-40 — +85 °C
-40 — +125 °C
-65 — +150 °C
Thermal Package Resistances
Thermal Resistance, 16-lead,
θ
JA
— 37 — °C/W 4-Layer JC51-7 Standard Board,
4 mm x 4 mm QFN
Thermal Resistance, 16-lead SOIC θ
JA
— 74 — °C/W 4-Layer JC51-7 Standard Board,
© 2005 Microchip Technology Inc. DS21893C-page 5
DD
= [V
(typ.) + 0.3V ] to 1 2 V.
REG
Natural Convection
Natural Convection
MCP73861/2/3/4
= 5.2V
MCP73861/3
DD
= 1000 mA
= 5.2V
2.0 TYPICAL PERFORMANCE CURVES
Note: The graphs and t ables provided following this note are a statistical summary based on a l im ite d n um ber 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, VDD = [V
(typ.) + 1V], I
REG
= 10 mA and TA= +25°C, Constant-voltage mode.
OUT
4.207
4.205
4.203
4.201
4.199
4.197
4.195
4.193
Battery Regulation Voltage (V)
10 100 1000
Charge Current (mA)
MCP73861/3
= V
V
SET
V
DD
DD
FIGURE 2-1: Battery Regulation Voltage
(V
) vs. Charge Current (I
BAT
4.40
4.30
4.20
4.10
4.00
3.90
3.80
Battery Regulation Voltage (V)
4.5 6.0 7.5 9.0 10.5 12.0
Supply Voltage (V)
OUT
).
V
= V
SET
I
OUT
1.00
0.90
0.80
0.70
0.60
0.50
Supply Current (mA)
0.40
10 100 1000
Charge Current (mA)
FIGURE 2-4: Supply Current (I
Charge Current (I
1.60
1.40
1.20
1.00
0.80
0.60
Supply Current (mA)
0.40
4.5 6.0 7.5 9.0 10.5 12.0
).
OUT
Supply Voltage (V)
I
OUT
MCP73861/3
V
= V
SET
V
DD
) vs.
SS
MCP73861/3
V
= V
SET
= 1000 mA
DD
DD
FIGURE 2-2: Battery Regulation Voltage
) vs. Supply Voltage (VDD).
(V
BAT
4.207
MCP73861/3
V
= V
SET
DD
I
= 10 mA
OUT
4.5 6.0 7.5 9.0 10.5 12.0
Supply Voltage (V)
Battery Regulation Voltage (V)
4.205
4.203
4.201
4.199
4.197
4.195
4.193
FIGURE 2-3: Battery Regulation Voltage
) vs. Supply Voltage (VDD).
(V
BAT
FIGURE 2-5: Supply Current (I
Supply Voltage (V
1.00
0.90
0.80
0.70
0.60
0.50
Supply Current (mA)
0.40
4.5 6.0 7.5 9.0 10.5 12.0
).
DD
Supply Voltage (V)
FIGURE 2-6: Supply Current (I
Supply Voltage (V
DD
).
) vs.
SS
MCP73861/3
V
= V
SET
I
= 10 mA
OUT
) vs.
SS
DD
DS21893C-page 6 © 2005 Microchip Technology Inc.
TYPICAL PERFORMANCE CURVES (CONTINUED)
NOTE: Unless otherwise indicated, VDD = [V
(typ.) + 1V], I
REG
= 10 mA and TA= +25°C, Constant-voltage mode.
OUT
MCP73861/2/3/4
0.45
MCP73861/3
0.40
V
= V
SET
DD
VDD = V
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
Output Leakage Current (µA)
SS
2.0 2 .4 2.8 3.2 3.6 4.0 4.4
Battery Regulation Voltage (V)
+85°C
+25°C
-40°C
FIGURE 2-7: Output Leakage Current
(I
DISCHARGE
(V
BAT
Therm. Reference Voltage (V)
) vs. Battery Regulation Voltage
).
2.550
MCP73861/3
= V
V
SET
I
THREF
DD
= 100 µA
Supply Voltage (V)
2.540
2.530
2.520
2.510
2.500
4.5 6.0 7.5 9.0 10.5 12.0
1.60
MCP73861/3
= V
V
SET
I
-40
OUT
DD
= 10 mA
0
-30
-20
Ambient Temperatur e (°C)
10203040506070
-10
1.40
1.20
1.00
0.80
0.60
Supply Current (mA)
0.40
FIGURE 2-10: Supply Current (I
Ambient Temperature (T
4.207
MCP73861/3
= V
V
Battery Regulation Voltage (V)
4.205
4.203
4.201
4.199
4.197
4.195
4.193
I
-40
SET
DD
= 10 mA
OUT
-30
-20
Ambient Temperature (°C)
).
A
0
10203040506070
-10
SS
80
) vs.
80
FIGURE 2-8: Thermistor Reference
Voltage (V
2.520
2.515
2.510
2.505
2.500
Therm. Reference Voltage (V)
) vs. Supply Voltage (VDD).
THREF
MCP73861/3
= V
V
SET
DD
0 25 50 75 100 125 150 175 200
Therm. Bias Current (µA)
FIGURE 2-9: Thermistor Reference
Voltage (V
(I
THREF
).
) vs. Thermistor Bias Current
THREF
FIGURE 2-11: Battery Regulation Voltage
(V
) vs. Ambient Temperature (TA).
BAT
2.520
MCP73861/3
= V
V
SET
DD
I
= 100 µA
THREF
2.515
2.510
2.505
2.500
Therm. Reference Voltage (V)
-40
-30
0
-20
10203040506070
-10
Ambient Temperatur e (° C)
80
FIGURE 2-12: Thermistor Reference
Voltage (V
) vs. Ambient Temperature (TA).
THREF
© 2005 Microchip Technology Inc. DS21893C-page 7
MCP73861/2/3/4
)
TYPICAL PERFORMANCE CURVES (CONTINUED)
NOTE: Unless otherwise indicated, VDD = [V
(typ.) + 1V], I
REG
= 10 mA and TA= +25°C, Constant-voltage mode.
OUT
8.407
MCP73862/4
= V
V
8.405
SET
DD
VDD = 9.4V
8.403
8.401
8.399
8.397
8.395
8.393
Battery Regulati on Volt age (V)
10 100 1000
Charge Current (mA)
FIGURE 2-13: Battery Regulation Voltage
(V
) vs. Charge Current (I
BAT
8.407
8.405
MCP73862/4
8.403
8.401
8.399
8.397
8.395
8.393
Battery Regulation Voltage (V
= V
V
SET
DD
I
= 1000 mA
OUT
10.0 10.4 10.8 11.2 11.6 12.0
Supply Voltage (V)
OUT
).
1.00
MCP73862/4
= V
V
SET
0.90
0.80
0.70
0.60
0.50
Supply Current (mA)
0.40
DD
VDD = 9.4V
10 100 1000
Charge Current (mA)
FIGURE 2-16: Supply Current (I
Charge Current (I
1.60
MCP73862/4
= V
V
SET
1.40
I
= 1000 mA
OUT
1.20
1.00
0.80
0.60
Supply Current (mA)
0.40
9.0 9.5 10.0 10.5 11.0 11.5 12.0
).
OUT
DD
Supply Voltage (V)
SS
) vs.
FIGURE 2-14: Battery Regulation Voltage
) vs. Supply Voltage (VDD).
(V
BAT
8.412
MCP73862/4
= V
V
SET
8.410
8.408
8.406
8.404
8.402
8.400
8.398
Battery Regulation Voltage (V)
DD
I
= 10 mA
OUT
9.0 9.5 10.0 10.5 11.0 11.5 12.0
Supply Voltage (V)
FIGURE 2-15: Battery Regulation Voltage
) vs. Supply Voltage (VDD).
(V
BAT
FIGURE 2-17: Supply Current (I
Supply Voltage (V
1.00
MCP73862/4
= V
V
SET
0.90
I
= 10 mA
OUT
0.80
0.70
0.60
0.50
Supply Current (mA)
0.40
9.0 9.5 10.0 10.5 11.0 11.5 12.0
).
DD
DD
Supply Voltage (V)
FIGURE 2-18: Supply Current (I
Supply Voltage (V
DD
).
SS
SS
) vs.
) vs.
DS21893C-page 8 © 2005 Microchip Technology Inc.
TYPICAL PERFORMANCE CURVES (CONTINUED)
NOTE: Unless otherwise indicated, VDD = [V
(typ.) + 1V], I
REG
= 10 mA and TA= +25°C, Constant-voltage mode.
OUT
MCP73861/2/3/4
0.45
MCP73862/4
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
Output Leakage Current (µA)
= V
V
SET
DD
VDD = V
SS
4.0 4.8 5.6 6.4 7.2 8.0 8.8
Battery Regulation Voltage (V)
+85°C
+25°C
-40°C
FIGURE 2-19: Output Leakage Current
(I
DISCHARGE
(V
BAT
Therm. Reference Voltage (V)
) vs. Battery Regulation Voltage
).
2.570
MCP73862/4
= V
V
SET
DD
I
= 100 µA
THREF
2.560
2.550
2.540
2.530
9.0 9.5 10.0 10.5 11.0 11.5 12.0
Supply Voltage (V)
1.60
MCP73862/4
= V
V
SET
I
-40
OUT
DD
= 10 mA
0
-30
-20
10203040506070
-10
Ambient Temperature (°C)
1.40
1.20
1.00
0.80
0.60
Supply Current (mA)
0.40
FIGURE 2-22: Supply Current (I
Ambient Temperature (T
8.414
8.410
8.406
8.402
8.398
8.394
8.390
8.386
Battery Regulation Voltage (V)
-40
-30
-20
).
A
0
10203040506070
-10
Ambient Temperature (°C)
) vs.
SS
MCP73862/4
= V
V
SET
I
= 10 mA
OUT
80
DD
80
FIGURE 2-20: Thermistor Reference
Voltage (V
2.550
2.548
2.546
2.544
2.542
2.540
Therm. Reference Voltage (V)
) vs. Supply Voltage (VDD).
THREF
MCP73862/4
= V
V
SET
DD
0 25 50 75 100 125 150 175 200
Thermistor Bias Current (µA)
FIGURE 2-21: Thermistor Reference
Voltage (V
(I
THREF
).
) vs. Thermistor Bias Current
THREF
FIGURE 2-23: Battery Regulation Voltage
(V
) vs. Ambient Temperature (TA).
BAT
2.550
2.546
2.542
2.538
2.534
2.530
Therm. Reference Voltage (V)
-40
-30
0
-20
10203040506070
-10
Ambient Temperature (°C)
MCP73862/4
V
SET
I
= 100 µA
THREF
= V
DD
80
FIGURE 2-24: Thermistor Reference
Voltage (V
) vs. Ambient Temperature (TA).
THREF
© 2005 Microchip Technology Inc. DS21893C-page 9
MCP73861/2/3/4
TYPICAL PERFORMANCE CURVES (CONTINUED)
NOTE: Unless otherwise indicated, VDD = [V
V
DD
V
BAT
(typ.) + 1V], I
REG
= 10 mA and TA= +25°C, Constant-voltage mode.
OUT
V
DD
V
BAT
MCP73861
VDD Stepped from 5.2V to 6.2V
I
= 10 mA
OUT
C
= 10 µF, X7R, Ceramic
OUT
FIGURE 2-25: Line Transient Response.
MCP73861
VDD 5.2V
C
= 10 µF, X7R, Ceramic
OUT
100 mA
10 mA
V
I
OUT
BAT
FIGURE 2-26: Load Transient Response.
0
MCP73861
= 5.2V
V
-10
DD
V
= 100 mVp-p
AC
-20
= 10 mA
I
OUT
-30
= 10 μF, Ceramic
C
OUT
-40
-50
-60
Attenuation (dB)
-70
-80
0.01 0.1 1 10 100 1000
Frequency (kHz)
MCP73861
VDD Stepped from 5.2V to 6.2V
I
= 500 mA
OUT
C
= 10 µF, X7R, Ceramic
OUT
FIGURE 2-28: Line Transient Response.
MCP73861
VDD 5.2V
C
= 10 µF, X7R, Ceramic
OUT
500 mA I
10 mA
V
BAT
OUT
FIGURE 2-29: Load T ransient Response.
0
-10
-20
-30
-40
-50
-60
Attenuation (dB)
-70
-80
0.01 0.1 1 10 100 1000
MCP73861
= 5.2V
V
DD
V
= 100 mVp-p
AC
= 100 mA
I
OUT
= 10 μF, X7R, Ceramic
C
OUT
Frequency (kHz)
FIGURE 2-27: Power Supply Ripple Rejection.
FIGURE 2-30: Power Supply Ripple Rejection.
DS21893C-page 10 © 2005 Microchip Technology Inc.
TYPICAL PERFORMANCE CURVES (CONTINUED)
:
:
NOTE: Unless otherwise indicated, VDD = [V
(typ.) + 1V], I
REG
= 10 mA and TA= +25°C, Constant-voltage mode.
OUT
MCP73861/2/3/4
1200
MCP73861/2/3/4
V
= V
SET
1000
800
600
400
200
Charge Current (mA)
0
OPEN 4.8k 1.6k 536 0
DD
Programming Resistor (
FIGURE 2-31: Charge Current (I
Programming Resistor (R
PROG
).
)
OUT
) vs.
505
MCP73861/2/3/4
= V
V
SET
R
-40
DD
= 1.6 k
PROG
-30
0
-20
-10
Ambient Temperature (°C)
10203040506070
503
501
499
497
Charge Current (μA)
495
493
FIGURE 2-32: Charge Current (I
Ambient Temperature (T
).
A
OUT
80
) vs.
© 2005 Microchip Technology Inc. DS21893C-page 11
MCP73861/2/3/4
3.0 PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLES
Pin No.
QFN SOIC
13 V
24 V
35 V
46 V
5 7 PROG Current Regulation Set
6 8 THREF Cell Temperature Sensor Bias
7 9 THERM Cell Temperature Sensor Input
810 TIMERTimer Set
911 V
10 12 V
11 13 V
12 14 V
13 15 V
14 16 EN Logic Enable
15 1 STAT2 Fault Status Output
16 2 STAT1 Charge Status Output
Symbol Function
SET
DD1
DD2
SS1
SS3
BAT1
BAT2
BAT3
SS2
Voltage Regulation Selection
Battery Management Input Supply
Battery Management Input Supply
Battery Management 0V Reference
Battery Management 0V Reference
Battery Charge Control Output
Battery Charge Control Output
Battery Voltage Sense
Battery Management 0V Reference
3.1 Voltage Regulation Selection
(V
)
SET
MCP73861/3: Connect V
voltage, connect to V
MCP73862/4: Connect V
voltage, connect to V
to VSS for 4.1V regulation
SET
for 4.2V regulation voltage.
DD
to VSS for 8.2V regulation
SET
for 8.4V regulation voltage.
DD
3.2 Battery Management Input Supply
(V
, V
DD2
A supply voltage of [V
recommended. Bypass to V
)
DD1
(typ.) + 0.3V] to 12V is
REG
with a minimum of
SS
4.7 µF.
3.3 Battery Management 0V Reference
(V
SS1
, V
SS2
, V
SS3
)
Connect to negative terminal of battery and input
supply.
3.4 Current Regulation Set (PROG)
Preconditioning, fast and termination currents are
scaled by placing a resistor from PROG to V
SS
.
3.5 Cell Temperature Sensor Bias (THREF)
THREF is a voltage reference to bias external
thermistor for cont inuous cell tem peratur e monitoring
and prequalification.
3.6 Cell Temperature Sensor Input (THERM)
THERM is an input for a n external therm istor for conti nuous cell-temperature monitoring and prequalification.
Connect to THREF/3 to disable temperature sensing.
3.7 Timer Set
All safety timers are scaled by C
TIMER
/0.1 µF.
3.8 Battery Charge Control Output
(V
Connect to positive terminal of battery. Drain terminal
of internal P-channe l MOSFET pass tran si stor. Bypass
to VSS with a minimum of 4.7 µF to ensure loop stability
when the battery is disconnected.
3.9 Battery Voltage Sense (V
V
is a voltage sense input. Connect to positive
BAT3
terminal of battery. A precision internal resistor divider
regulates the final voltage on this pin to V
BAT1
, V
BAT2
)
)
BAT3
.
REG
3.10 Logic Enable (EN)
EN is an input to force charge termination, initiate
charge, clear faults or disable automatic recharge.
3.1 1 Fault Status Output (STAT2)
STAT2 is a 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.
3.12 Charge Status Output (STAT1)
STAT1 is a 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.
DS21893C-page 12 © 2005 Microchip Technology Inc.
4.0 DEVICE OVERVIEW
0
The MCP7386X family of devices are highly advanced
linear charge management controllers. Refer to the
functional block diagram. Figure 4-2 depicts the
operational flow algorithm from charge initiation to
completion and automatic recharge.
4.1 Charge Qualification and Preconditioning
Upon insertion of a ba ttery , or a pplication of an external
supply, the MCP7386X family of devices automatically
performs a series of safety checks to qualify the
charge. The input source voltage must be above the
Undervoltage Lockout (UVLO) threshold, the enable
pin must be above the logic-high level and the cell
temperature must be within the upper and lower
thresholds. The qualification parameters are
continuously monitored. Deviation beyond the limits
automatically suspen ds or terminat es the charge cycle.
The input voltage must deviate below the UVLO stop
threshold for at l east one cloc k peri od to b e con sidere d
valid.
Once the qualification parameters have been met, the
MCP7386X 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 MCP7386X precond iti ons th e ba tte ry w i th a tric kl echarge. 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
during the initial ch arge cycle. If the batter y volt age has
not exceeded the preconditioning threshold before the
preconditioning timer has expired, a fault is indicated
and the charge cycle is terminated.
4.2 Constant Current Regulation – Fast Charge
Preconditioning ends, and fast charging begins, when
the battery volta ge exceeds the p reconditioni ng threshold. Fast charge regulate s to a const ant current (I
which is set via an external resistor connected to the
PROG pin. Fast charge continues until the battery
voltage reaches the regulation voltage (V
fast charge timer expires; in which case, a fault is
indicated and the charge cycle is terminated.
4.3 Constant Voltage Regulation
When the battery voltage reaches the regulation
voltage (V
The MCP7386X monitors the battery voltage at the
pin. This input is tied directly to the positive
V
BAT
terminal of the battery. The MCP7386X selects the
voltage regulation value based on the state of V
With V
), constant voltage regulation begins.
REG
tied to VSS, the MCP73861/3 and
SET
REG
PTH
REG
), or the
SET
MCP73861/2/3/4
MCP73862/4 regulate to 4.1V and 8.2V, respectively.
With V
MCP73862/4 regulate to 4.2V and 8.4V, respectively.
4.4 Charge Cycle Completion and
The MCP7386X monitors t he charging current during
the Constant-voltage regulation mode. The charge
cycle is considered complete whe n the charge c urrent
has diminished below approximately 8% of the
regulation current (I
expired.
The MCP7386X automatically begins a new charge
cycle when the bat tery v olt age fa lls b elow the recharge
threshold (V
parameters are met.
4.5 Thermal Regulation
The MCP7386X family limits the charge current based
on the die temperature. Thermal regulation optimizes
the charge cycle time while maintaining device reliability . If thermal regulation is ente red, the timer i s automatically slowed down to ensure that a charge cycle will
not terminate prematurely. Figure 4-1 depicts the
),
thermal regulation profile.
FIGURE 4-1: Typical Maximum Charge
),
Current vs. Die Temperature.
4.6 Thermal Shutdown
The MCP7386X family suspends charge if the die
temperature exceeds 155°C. Charging will resume
when the die temperatu re has cool ed by appro ximatel y
10°C. The thermal shutdown is a secondary safety
feature in the event that there is a failure within the
thermal regulation circuitry.
.
tied to VDD, the MCP73861/3 and
SET
Automati c R e -Charge
), or the elapsed timer has
REG
), assuming all the qualification
RTH
1400
1200
1000
800
600
400
200
Maximum Charge Current (mA)
0
0 20 40 60 80 100 120 14
Minimum
Die Temperature (° C)
Maximum
© 2005 Microchip Technology Inc. DS21893C-page 13
MCP73861/2/3/4
STAT1 = Off
STAT1 = Fla shi n g
(MCP73863/4)
(MCP73861/2)
STAT2 = Off
No
RTH
UVLO
< V
DD
V
Charge Termination
Charge Current = 0
Reset Safety Timer
Yes
< V
BAT
or EN Low
V
(All Devices)
Yes
REG
TERM
No
< I
Expired
OUT
I
Elapsed Timer
Output Voltage = V
Constant-Voltage Mode
No
STAT1 = Flashing
Safety Timer Suspended
Charge Current = 0
Temperature OK
Yes
Initialize
STAT1 = On
Charge Current = 0
STAT2 = Flashing
Yes
PTH
> V
BAT
V
STAT2 = Off
REG
Yes
Reset Safety Timer
Constant-Current Mode
Charge Current = I
Yes
REG
= V
BAT
V
No
STAT2 = Flashing
No
STAT1 = Off
Safety Timer Suspended
Charge Current = 0
No
Expired
Safety Timer
Yes
Temperature OK
Yes
Note 2
UVLO
> V
DD
V
Note 1
EN High
No
No
STAT1 = Off
STAT2 = Off
STAT1 = Off
Yes
Temperature OK
Note 1
No
No
STAT1 = Off
STAT2 = OnSTAT2 = Flashing
UVLO
Yes
< V
DD
or EN Low
V
Fault
Charge Current = 0
Reset Safety Timer
No
Yes
No
STAT1 = Off
Safety Timer Suspended
Charge Cur rent = 0
No
Expired
Safety Timer
Temperature OK
Yes
, for details.
PREG
Section 4.5, “Thermal Regulation”, for
monitored througho ut the charge cycle. Refe r to
Section 4.1, “Charge Qualification and
Preconditioning”
die temperature duri ng thermal reg ulation. Refe r
to
details.
Preconditioning Mode
Charge Current = I
Reset Safety Timer
Note 1: The qualification parameters are continuously
Note 2: The charge current will be scaled based on th e
Yes
PTH
> V
BAT
V
FIGURE 4-2: Operational Flow Algorithm.
DS21893C-page 14 © 2005 Microchip Technology Inc.
MCP73861/2/3/4
.
5.0 DETAILED DESCRIPTION
5.1 Analog Circuitry
5.1.1 BATTERY MANAGEMENT INPUT
SUPPLY (V
The VDD input is the input supply to the MCP7386X.
The MCP7386X automatically enters a Power-down
mode if the v oltage on the V
UVLO vol tage (V
STOP
the battery pack when the V
5.1.2 PROG INPUT
Fast charge current regulation can be scaled by placing
a programmin g r es ist or (R
to V
. Connecting the PROG input to VSS allows for a
SS
maximum fast charge current of 1.2A, typically. The
minimum fast charge current is 100 mA, set by letting
the PROG input float. The following formula calculates
the value for R
PROG
R
PROG
:
where:
= the desired fast charge current in amps
I
REG
R
= measured in kΩ.
PROG
The preconditioning trickle-charge current and the
charge termination current are sca led to a pproxima tely
10% and 8% of I
, respectively.
REG
5.1.3 CELL TEMPERATURE SENSOR
BIAS (THREF)
A 2.5V voltage reference is provided to bias an ext ernal
thermistor for continuous cell temperature monitoring
and prequalification. A ratio metri c window c omp ariso n
is performed at threshold levels of V
V
THREF
/4.
, V
DD1
)
DD2
input falls below the
DD
). This feature prevents draining
supply is no t present.
DD
) from the PR OG i npu t
PROG
13.2 11 I
----------------------------------------
=
12 I
×–
× 1.2–
REG
REG
THREF
/2 and
Figure 6-1 depicts a typical application circuit with
connection of the THERM input. The resistor values of
RT1 and RT2 are calculated with the following
equations.
For NTC thermistors:
2R
----------------------------------------------
R
=
T1
2R
----------------------------------------------
R
=
T2
R
R
COLD
××
COLDRHOT
–
COLDRHOT
××
COLDRHOT
3R×
–
HOT
For PTC thermistors:
2R
----------------------------------------------
R
=
T1
2R
----------------------------------------------
R
=
T2
R
R
HOT
××
COLDRHOT
–
HOTRCOLD
××
COLDRHOT
3R×
–
COLD
Where:
R
COLD
and R
are the thermistor
HOT
resistance values at the temperature window
of interest.
Applying a voltage equal to V
/3 to the THERM
THREF
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
TIMER
t
PRECON
-------------------
0.1μF
1.0Hour× s=
The fast charge safety timer period:
C
TIMER
t
FAST
-------------------
0.1μF
1.5Hours×=
TIMER
) between
5.1.4 CELL TEMPERATURE SENSOR
INPUT (THERM)
The MCP73861/2/3/4 continuously monitors temperature by comparing the voltage between the THERM
input and V
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 m etric com pa rison. Ther efore,
it is immune to fluctuations in the supply input (V
The temperature-sensing circuit is removed from the
system when VDD is not applied, eliminating additional
discharge of the battery pack.
with the upper and lower temperature
SS
DD
).
The elapsed time termination period:
C
TIMER
t
TERM
-------------------
0.1μF
3.0Hours×=
The preconditioning timer starts after qualification and
resets when the charge cycle transitions to the fast
charge, Constant-current mode. The fast charge timer
and the elapsed timer start once the MCP7386X
transitions from preconditioning. The fast charge timer
resets when the charge cycle transitions to the
Constant-voltage mode. The elapsed timer will expire
and terminate the charge if the sensed current do es not
diminish below the termination threshold.
During thermal regulation, the timer is slowed down
proportional to the charge curren t.
© 2005 Microchip Technology Inc. DS21893C-page 15
MCP73861/2/3/4
5.1.6 BATTERY VOLTAGE SENSE (V
The MCP7386X monitors the battery voltage at the
pin. This input is tied directly to the positive
V
BAT3
terminal of the battery pack.
BAT3
5.1.7 BATTERY CHARGE CONTROL
OUTPUT (V
The battery charge control output is the drain terminal
of an internal P-channel MOSFET. The MCP7386X
provides constant cu rren t and vol t ag e reg ula tio n to th e
battery pack by control ling this MO SFET in th e linear
region. The battery charge control output should be
connected to the positive terminal of the battery pack.
BAT1
, V
BAT2
)
5.2 Digital Circuitry
5.2.1 CHARGE STATUS OUTPUTS
(STAT1,STAT2)
Two status outputs provide information on the state of
charge. The current-l imited, open-drain outp ut s can be
used to illuminate external LEDs. Optionally, a pull-up
resistor can be used on the output for communication
with a host mic rocontroll er. Table 5 -1 summarize s the
state of the status outputs during a charge cycle.
TABLE 5-1: STATUS OUTPUTS (NOTE)
CHARGE
CYCLE STAT1
Qualification Off Off
Preconditioning On Off
Constant-
Current Fast
Charge
ConstantVoltage
Charge
Complete
Fault Off On
THERM Invalid Off Flashing (1 Hz,
Disabled –
Sleep mode
Input Voltage
Disconnected
Note: Off state: Open-drain is high-impedance
On state: Open-drain can sink current
Flashing: Toggles between off state and
STAT1 STAT2
On Off
On Off
Flashing (1 Hz,
50% duty cycl e)
(MCP73861/2)
Off
(MCP73863/4)
50% duty cycl e)
Off Off
Off Off
typically 7 mA
on state
Off
(All Devices)
)
The flash ing rate (1 H z) is based off a time r capaci tor
(C
value of the timer capacitor.
During a fault condition, the STAT1 status output will be
off and the STAT2 status output will be on. To recover
from a fault condition, the input voltage must be
removed and then reapplied, or the enable input (EN)
must be de-asserted to a logic-low, then asserted to a
logic-high.
When the voltage on the THERM input is outside the
preset window, the charge cycle will not start, or will be
suspended. The charge cycle is not terminated and
recovery is automatic. The ch arge cycle will resum e (or
start) once the THERM input is valid and all other
qualification parameters are met. During an invalid
THERM condition, the STAT1 status output will be off
and the STAT2 status output will flash.
5.2.2 V
The V
the MCP7386X. With V
MCP73861/3 and MCP73862/4 regulate to 4.1V and
8.2V, respectively. With V
MCP73861/3 and MCP73862/4 regulate to 4.2V and
8.4V, respectively.
) of 0.1 µF. The rate will vary based on the
TIMER
INPUT
SET
input selects the regulated output voltage of
SET
tied to VSS, the
SET
tied to VDD, the
SET
5.2.3 LOGIC ENABLE (EN)
The logic enable input pin (EN) can be used to
terminate a charge at any ti me du ring the c harge cy cle,
as well as to in itiate a charge cycle or initi ate a recharge
cycle.
Applying a logic- high in put signa l to the EN pin, o r 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 0.17 µA, typically.
DS21893C-page 16 © 2005 Microchip Technology Inc.
MCP73861/2/3/4
6.0 APPLICATIONS
The MCP7386X is desi gned to operate in conjunction
with a host microcon troller or in stand- alone applications. The MCP738 6X provides t he preferred c harge
algorithm for Lithium-Ion and Lithium-Polymer cells
Unregulated
Wall Cube
V
SET
1
V
DD1
2
V
DD2
3
V
SS1
4
5678
R
PROG
ENSTAT1
STAT2
141516
MCP73861
THREF
THERM
R
T1
R
T2
Constant-current followed by Constant-voltage.
Figure 6-1 depicts a typical stand-alone application
circuit, while Figures 6-2 and 6-3 depict the
accompanying charge pro file.
V
SS2
13
V
BAT3
12
V
BAT2
11
V
BAT1
10
V
SS3
9
TIMERPROG
C
TIMER
+
Single
Lithium-Ion
–
Cell
FIGURE 6-1: Typi cal App li ca tio n Circui t.
Regulation
Voltage
)
(V
REG
Regulation
Current
(I
)
REG
Transition
Threshold
)
(V
PTH
Precondition
Current
)
(I
PREG
Termination
Current
)
(I
TERM
Preconditioning
Mode
Precondition
Safety Timer
Constant-Current
Mode
Charge
Voltage
Fast Charge
Safety Timer
FIGURE 6-2: Typi cal Char ge Prof il e.
Constant-Voltage
Mode
Charge
Current
Elapsed Time
Termination Timer
© 2005 Microchip Technology Inc. DS21893C-page 17
MCP73861/2/3/4
Regulation
Voltage
)
(V
REG
Regulation
Current
(I
)
REG
Transition
Threshold
)
(V
PTH
Precondition
Current
)
(I
PREG
Termination
Current
)
(I
TERM
Preconditioning
Mode
Precondition
Safety Timer
Constant-Current
Mode
Charge
Voltage
Fast Charge
Safety Timer
Constant-Voltage
Mode
Charge
Current
Elapsed Time
Termination Timer
FIGURE 6-3: Typical Charge Profile in Thermal Regulation.
6.1 Application Circuit Design
Due to the low efficiency of linear charging, the most
important fa ctors are thermal design and cost, which
are a direct function of th e input voltage, output current
and thermal impedance between the battery charger
and the ambient cool ing air. The worst-case situation is
when the device has transitioned from the
Preconditioning mode to the Constant-c urrent mode. In
this situation, the battery charger 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 Figure6-1 is
crucial to the integrity and reliability of the charging
system. The follow ing discussion is intended as a guide
for the component selection process.
1200 mA is the maximum charge current obtainable
from the MCP7386X. For this situation, the PROG input
should be connected directly to V
6.1.1.2 Thermal Considerations
The worst-case power dissipation in the battery
charger occurs when the input voltage is at the
maximum and the device has transitioned from the
Preconditioning mode to the Const ant-current mo de. In
this case, the power dissipation is:
PowerDissipation V
Where:
V
DDMAX
I
REGMAX
V
PTHMIN
6.1.1.1 Current Prog ra mmi ng Resis tor
(R
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 ba ttery pa ck perform ance or lif e.
PROG
)
.
SS
–()I
DDMAXVPTHMIN
×=
REGMAX
= the maximum input voltage
= the maximum fast charge current
= the minimum transition threshold
voltage
DS21893C-page 18 © 2005 Microchip Technology Inc.
MCP73861/2/3/4
Power dissipatio n with a 5V, ±10% input v oltage so urce
is:
PowerDissipation 5.5V 2.7V–()575mA× 1.61W==
With the battery charger mounted on a 1 in2 pad of
1 oz. copper, the junction temperature rise is 60°C,
approximately. This would allow for a maximum oper ating ambient temperature of 50°C before thermal
regulation is entered.
6.1.1.3 External Capacitors
The MCP7386X is stable with or without a battery load.
In order to maintain good AC stability in the Constantvoltage mode, a minimum capacitance of 4.7 µF is
recommended to bypass the V
capacitance provides compensation when there is no
battery load. In addition, the battery and interconnections appear inductive at high frequencies. These
elements are in the control feedback loop during
Constant-vol t ag e mo de . 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
Effective Series Resistance (ESR) value. The actual
value of the capacitor (and its associated ESR)
depends on the output load current. A 4.7 µF ceramic,
tantalum or aluminum electrolytic capacitor at the
output is usually suf ficien t to ensure stability for up to a
1A output current.
pin to VSS. This
BAT
6.2 PCB Layout Issues
For optimum voltage regulation, place the batte ry pack
as close as possibl e to the devi ce’ s V
recommended to minimize voltage drops along the
high current-carrying PCB traces.
If the PCB layout is used as a heatsink, adding many
vias in the heats ink p ad can help conduct more heat to
the backplane of the PCB, thus red ucing the ma ximum
junction temperature.
and VSS pins,
BAT
6.1.1.4 Revers e-Bl ocki ng Prote cti on
The MCP7386X provides protection from a faulted or
shorted input, or from a reversed-p ol arit y inp ut so urc e.
Without the protecti on, a fa ulted o r sh orted in put woul d
discharge the battery pack through the body diode of
the internal pass transistor.
6.1.1.5 Enable Interface
In the stand-alone configuration, the enable pin is
generally tied to the input voltage. The MCP7386X
automatically enters a Low-power mode when voltage
on the V
reducing the battery drain current to 0.23 µA, typically.
input falls below the U VLO voltag e (V
DD
STOP
6.1.1.6 Charge Status Interface
Two status outputs provide information on the state of
charge. The current-limited, ope n-drain outp uts can be
used to illuminate external LEDs . Refer to Table 5-1 for
a summary of the state of the status outputs during a
charge cycle.
),
© 2005 Microchip Technology Inc. DS21893C-page 19
MCP73861/2/3/4
7.0 PACKAGING INFORMATION
7.1 Package Marking Information
16-Lead QFN*
141516
1
XXXXXXXX
2
XXXXXXXX
3
YYWW
NNN
4
5678
13
12
11
10
9
Example:
1
73861
2
3
4
5678
16-Lead SOIC (150 mil) Example:
XXXXXXXXXXXXX
XXXXXXXXXXXXX
YYWWNNN
141516
I/ML
0532
256
13
12
11
10
9
MCP73861
e
I/SL^^
0532256
3
Legend: XX...X Customer-specific information
Y Year code (last digit of calendar year)
YY Year code (last 2 digits of calendar year)
WW Week code (week of January 1 is week ‘01’)
NNN Alphanumeric traceability code
3
e
Pb-free JEDEC designator for Matte Tin (Sn)
* This package is Pb-free. The Pb-free JEDEC designator ( )
3
e
can be found on the ou ter packaging for this package.
Note: In the event the full Microchip part numb er cann ot be mark ed on one line, it wil l
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
DS21893C-page 20 © 2005 Microchip Technology Inc.
MCP73861/2/3/4
16-Lead Plastic Quad Flat No-Lead Package (ML) 4x4x0.9 mm Body (QFN) – Saw Singulated
D
E
TOP VIEW BOTTOM VIEW
A
A1
Units
Dimension Limits
Number of Pins
Pitch
Overall Height
Standoff
Contact Thickness
Overall Width
Exposed Pad Width
Overall Length
Exposed Pad Length
Contact Width
Contact Length
*
Controlling Parameter
Notes:
1.
Pin 1 visual index feature may vary, but must be located within the hatched area.
2.
Exposed pad varies according to die attach paddle size.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
See ASME Y14.5M
REF: Reference Dimension, usually without tolerance, for information purposes only.
See ASME Y14.5M
JEDEC equivalent: M0-220
Drawing No. C04-127
A1
A3
E2
D2
MIN
n
e
A
E
D
b
L
OPTIONAL
INDEX
AREA
(NOTE 1)
.031
.000
.152
.090
.152
.090
.010
.012
EXPOSED
METAL
(NOTE 2)
A3
INCHES
NOM
.026 BSC
.008 REF
PAD
E2
2
1
MAX
16
.035
.001
.157
.104
.157
.104
.012
.016
.039
.002
.163
.106
.163
.106
.014
.020
D2
e
b
n
L
MILLIMETERS
MIN
0.65 BSC
0.80
0.00
0.20 REF
3.85
2.29
3.85
2.29
0.25
0.30
*
NOM
16
0.90
0.02
4.00
2.64
4.00
2.64
0.30
0.40
Revised 07-21-05
MAX
1.00
0.05
4.15
2.69
4.15
2.69
0.35
0.50
© 2005 Microchip Technology Inc. DS21893C-page 21
MCP73861/2/3/4
16-Lead Plastic Small Outline (SL) – Narrow 150 mil Body (SOIC)
E
E1
p
D
2
B
n
45°
1
h
α
c
φ
L
β
Number of Pins
Pitch
Foot Angle
Lead Thickne ss
Mold Draft Angle Top
Mold Draft Angle Bottom
* Controlling Parameter
§ Significant Characteristic
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: MS-012
Drawing No. C04-108
n
p
φ
c
α
β
A
A1
MILLIMETERSINCHES*Units
.050
048048
1616
1.27
A2
MAXNOMMINMAXNOMMINDimension Limits
1.751.551.35.069.061.053AOverall Height
1.551.441.32.061.057.052A2Molded Package Thickness
0.250.180.10.010.007.004A1Standoff §
6.206.025.79.244.237.228EOverall Width
3.993.903.81.157.154.150E1Molded Package Width
10.019.919.80.394.390.386DOverall Length
0.510.380.25.020.015.010hChamfer Distance
1.270.840.41.050.033.016LFoot Length
0.250.230.20.010.009.008
0.510.420.33.020.017.013BLead Width
1512015120
1512015120
DS21893C-page 22 © 2005 Microchip Technology Inc.
APPENDIX A: REVISION HISTORY
Revision C (August 2005)
The following is the list of modifications:
1. Added MCP73863 and MCP73864 devices
throughout data sheet.
2. Added A ppendix A: Revision History.
3. Updated QFN and SOIC package diagrams.
Revision B (December 2004)
• Added SOIC package throughout data sheet.
Revision A (June 2004)
• Original Release of this Document.
MCP73861/2/3/4
© 2005 Microchip Technology Inc. DS21893C-page 23
MCP73861/2/3/4
NOTES:
DS21893C-page 24 © 2005 Microchip Technology Inc.
MCP73861/2/3/4
PRODUCT IDENTIFICATION SYSTEM
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
PackageTemperature
Range
Device MCP73861: Single-Cell C har ge Cont rol le r with
MCP73861T: Single-Cell Charge Control le r with
MCP73862: Dual Series Cells Charge Controller with
MCP73862T: Dual Series Cells Charge Controller with
MCP73863: Single-cell Charge Controller with
MCP73863T: Single-Cell Charge Control le r with
MCP73864: Dual Series Cells Charge Controller with
MCP73864T: Dual Series Cells Charge Controller with
Temperature Monitor
Temperature Monitor, Tape and Reel
Temperature Monitor
Temperature Monitor, Tape and Reel
Temperature Monitor
Temperature Monitor, Tape and Reel
Temperature Monitor
Temperature Monitor, Tape and Reel
Examples:
a) MCP73861-I/ML: Single-Cell Controller
b) MCP73861T-I/ML: Tape and Reel,
c) MCP73861-I/SL: Single-Cell Controller
d) MCP73861T-I/SL: Tape and Reel,
a) MCP73862-I/ML: Dual-Cell Controller
b) MCP73862T-I/ML: Tape and Reel,
c) MCP73862-I/SL: Dual-Cell Controller
d) MCP73862T-I/SL: Tape and Reel,
16LD-QFN package.
Single-Cell Controller
16LD-QFN package.
16LD-SOIC package.
Single-Cell Controller
16LD-SOIC package.
16LD-QFN package.
Dual-Cell Controller
16LD-QFN package.
16LD-SOIC package.
Dual-Cell Controller
16LD-SOIC package.
Temperature Range I = -40°C to +85°C (Industrial)
Packages ML = Plastic Quad Flat No Lead, 4x4 mm Body (QFN),
SL = Plastic Small Outline, 150 mm Body (SOIC),
16-lead
16-lead
a) MCP73863-I/ML: Single-Cell Controller
b) MCP73863T-I/ML: Tape and Reel,
c) MCP73863-I/SL: Single-Cell Controller
d) MCP73863T-I/SL: Tape and Reel,
a) MCP73864-I/ML: Dual-Cell Controller
b) MCP73864T-I/ML: Tape and Reel,
c) MCP73864-I/SL: Dual-Cell Controller
d) MCP73864T-I/SL: Tape and Reel,
16LD-QFN package.
Single-Cell Controller
16LD-QFN package.
16LD-SOIC package.
Single-Cell Controller
16LD-SOIC package.
16LD-QFN package.
Dual-Cell Controller
16LD-QFN package.
16LD-SOIC package.
Dual-Cell Controller
16LD-SOIC package.
© 2005 Microchip Technology Inc. DS21893C-page 25
MCP73861/2/3/4
NOTES:
DS21893C-page 26 © 2005 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 com mitted to continuously improving the code protect ion f eatures of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digit al Mill ennium 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 provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED,
WRITTEN OR ORAL, STATUTORY OR OTHERWISE,
RELATED TO THE INFORMATION, INCLUDING BUT NOT
LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE,
MERCHANTABILITY OR FITNESS FOR PURPOSE.
Microchip disclaims all liability arising from this information and
its use. Use of M icrochip’s prod ucts 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 Microchip intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, K
EELOQ, microID, MPLAB, PIC, PICmicro,
PICSTART, PRO MATE, PowerSmart, rfPIC , and
SmartShunt are registered trademarks of Microchip
Technology Incor porated in the U.S.A. and other countries.
AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB,
PICMASTER, SEEVAL, SmartSensor and The Embedded
Control Solutions Company are registered trademarks of
Microchip Technology I ncorporat ed in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, dsPICDEM,
dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR,
FanSense, FlexROM, fuzzyLAB, In-Circuit Serial
Programming, ICSP, ICEPIC, Linear Active Thermistor,
MPASM, MPLIB , MPLINK, MPSI M, PICkit, P I C DEM,
PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo,
PowerMate, PowerTool, rfLAB, rfPICDEM, Select Mode,
Smart Serial, SmartTel, Total Endurance and WiperLock are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip T echnology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2005, Microchip Technology Incorporated, Pr inted in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 quality system certification for
its worldwide headquarters, design and wafer fabrication facilities in
Chandler and Tempe, Arizona and Mountain View, California in
October 2003. The Company’s quality system processes and
procedures are for its PICmicro
devices, Serial 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, KEELOQ
®
code hopping
© 2005 Microchip Technology Inc. DS21893C-page 27
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08/24/05
DS21893C-page 28 © 2005 Microchip Technology Inc.
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