Analog Devices ADP3802AR, ADP3801AR Datasheet

High Frequency Switch Mode

BATA

BATB

VCC

DRV

EOC

CS–

CS+

ISET

BATA

ADJ

GND

RESET

V

IN

VL

ADP3801/ADP3802

SD

BATB

3.3V

40mV

A/B

COMP

PROG

68mH

a

FEATURES
Stand-Alone Li-Ion Battery Chargers
High End-of-Charge Voltage Accuracy

ⴞ0.4% @ +25ⴗC
ⴞ0.75% @ –10ⴗC to +70ⴗC

Intelligent End-of-Charge Output Signal
Pin Programmable Cell Number Select
On Chip 3.3 V LDO Regulator
Programmable Charge Current with High Side Sense
Softstart Charge Current
Undervoltage Lockout
Drives External PMOS
ⴞ10% Adjustable End-of-Charge Voltage
Charges NiCad, NiMH (with External ␮Controller)
PWM Oscillator Frequency:

ADP3801: 200 kHz
ADP3802: 500 kHz

APPLICATIONS
Fast Chargers
Universal Chargers
Cellular Phones
Portable Computers
Portable Instrumentation
Desktop Chargers
Personal Digital Assistants

Dual Li-Ion Battery Chargers

ADP3801/ADP3802

FUNCTIONAL BLOCK DIAGRAM

RESET

VL

SD

LDO +

REFERENCE

SHUTDOWN

RESET

ADP3801/ADP3802

UVLO

+

GND

DRVVCC

GATE

DRIVE

PWM

SD\UVLO

EOC

CURRENT

LOOP

AMP + EOC

COMPARATOR

VOLTAGE

LOOP

COMP

CS+

CS–

FINAL BATTERY

AMP

A/B

A/B

SELECT

MUX

VOLTAGE

PROGRAM

(4.2, 8.4, 12.6)

BATTERY
VOLTAGE

ADJUST

610%

ADJ

BATA

BATB

ISET

PROG

GENERAL DESCRIPTION

The ADP3801 and ADP3802 are complete battery charging
ICs. The devices combine a high accuracy final battery voltage
control with a constant charge current control and an on-board
Low Drop-Out Regulator (LDO). The accuracy of the final

battery voltage control is guaranteed to ±0.75% to safely charge

Li-Ion batteries. An internal multiplexer allows the alternate
charging of two separate battery stacks. The final voltage is pin
programmable to one of three Li-Ion options: 4.2 V (one Li-Ion
cell), 8.4 V (two Li-Ion cells), or 12.6 V (three Li-Ion cells).
Paired with an external microcontroller for charge termination,
the ADP3801/ADP3802 works as a fast charger for NiCad/
NiMH batteries or as a universal charger for all three battery
chemistries. In addition, a pin is provided for changing the final

battery voltage by up to ±10% to adjust for variations in battery

chemistry from different Li-Ion manufacturers without loss of
accuracy in the final battery voltage.

REV. 0

Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 1998

Figure 1. 4 Amp Dual Battery Charger

ADP3801/ADP3802–SPECIFICATIONS

(@ –40ⴗC ≤ TA ≤ +85ⴗC, VCC = 10.0 V, unless otherwise noted)

Parameter Conditions Symbol Min Typ Max Units

FINAL BATTERY VOLTAGE

One Li-Ion Cell PROG = VT1, ADJ = VL, T

Two Li-Ion Cells

1

Three Li-Ion Cells

PROG = V
PROG = V
PROG = VT2, ADJ = VL, T
PROG = V

1

PROG = V
PROG = VT3, ADJ = VL, T
PROG = V
PROG = V

, ADJ = VL, –10°C ≤ TA ≤ +70°CV

T1

, ADJ = VL, –40°C ≤ TA ≤ +85°CV

T1

, ADJ = VL, –10°C ≤ TA ≤ +70°CV

T2

, ADJ = VL, –40°C ≤ TA ≤ +85°CV

T2

, ADJ = VL, –10°C ≤ TA ≤ +70°CV

T3

, ADJ = VL, –40°C ≤ TA ≤ +85°CV

T3

= +25°CV

A

= +25°CV

A

= +25°CV

A

BAT

BAT

BAT

BAT

BAT

BAT

BAT

BAT

BAT

4.180 4.200 4.220 V

4.168 4.232 V

4.150 4.250 V

8.366 8.400 8.434 V

8.337 8.463 V

8.300 8.500 V

12.550 12.600 12.650 V

12.505 12.695 V

12.450 12.750 V

BATTERY PROGRAMMING

INPUT (PROG)
One Li-Ion Cell (4.2 V) V
Two Li-Ion Cells (8.4 V) V
Three Li-Ion Cells (12.6 V) V

T1

T2

T3

0.00 0.20 V

1.00 1.20 V

2.05 2.30 V
Fail Safe Voltage (4.2 V) Defaults to 1 Li-Ion Cell 3.10 3.30 V
PROG Input Current I

B

1.5 5 µA

A/B SELECT MUX

Select Battery BATB V
Select Battery BATA V
A/B Input Current I
BATA or BATB Input Resistance Channel Selected R
BATA or BATB Input Current Channel Not Selected I
BATA or BATB Shutdown Current Part in Shutdown IBA, I

2

BATTERY ADJUST INPUT

% of Final Battery Voltage ADJ = 1.0 V, –10°C ≤ T
% of Final Battery Voltage ADJ = 2.3 V, –10°C ≤ T

(ADJ)

≤ +70°C 899091 %

A

≤ +70°C 109 110 111 %

A

IN

BA

IH

IL

IN

, I

2.0 V

0.02 1 µA

185 265 kΩ

BB

BB

0.2 1 µA

0.2 1 µA

0.8 V

ADJ Disable Voltage Threshold 0% Change 2.475 2.6 V

ADJ Bias Current 1.0 V ≤ ADJ ≤ 2.3 V I

B

10 100 nA

OVERVOLTAGE COMPARATOR

Trip Point Percent Above V

BAT

8%

Response Time DRV Goes High tr 2 µs

OSCILLATOR

200 kHz Option (ADP3801) f
500 kHz Option (ADP3802) f

OSC

OSC

150 200 250 kHz

375 500 625 kHz
0% Duty Cycle Threshold @ COMP Pin 1.0 V
100% Duty Cycle Threshold @ COMP Pin 2.0 V

GATE DRIVE

Rise Time CL = 1 nF, VCC – 4 V to 90% t
Fall Time C
Output High Saturation Voltage VCC – V

= 1 nF, 90% to VCC – 4 V t

L

DRV

Output Low Voltage VCC = 8 V V

VCC > 8 V V

r

f

V

OH

OL

OL

1.0 2.0 V

VCC – 7 VCC – 6 V

35 ns
75 ns
275 mV

CURRENT SENSE AMPLIFIER

Input Common-mode Range V
Input Differential Mode Range V
Input Offset Voltage

4

Input Bias Current 0.0 V ≤ V
Input Offset Current 0.0 V ≤ V

Over Current Trip Point V

and V

CS+

3

CS

0.0 V ≤ V

3

CS

CS–

≤ VCC – 2 V V

CSCM

≤ VCC – 2 V V

CSCM

≤ VCC – 2 V V

CSCM

V

CSCM

V

CSDM

CSVOS

CSIB

CSIOS

0.0 VCC – 2 V

0.0 185 mV
1mV

0.3 1 µA

0.01 0.15 µA

185 mV

Response Time DRV Goes High tr 2 µs

ISET INPUT

Charge Current Programming

Function 0.0 V ≤ V

Programming Function Accuracy V

= 1.65 V, –10°C ≤ TA ≤ +70°C–5±1.0 +5 %

ISET

V

= 0.10 V, –10°C ≤ TA ≤ +70°C –25 ±10 +25 %

ISET

ISET Bias Current 0.0 V ≤ V

≤ 1.65 V V

ISET

≤ 1.65 V I

ISET

CS/VISET

B

3

0.1 V/V

15 100 nA

–2–

REV. 0

ADP3801/ADP3802

Parameter Conditions Symbol Min Typ Max Units

BAT

CS+

+ 2 V.

) – (V

5

CS–

3

CS

3

CS

H

L

6

).

0 mA ≤ I

4.1 V ≤ VCC ≤ 20 V, –10°C ≤ T
0 mA ≤ I

4.1 V ≤ VCC ≤ 20 V, –40°C ≤ T

= 10 mA V

LOAD

LOAD

LOAD

≤ 10 mA,
≤ 10 mA,

≤ +70°C VL 3.267 3.3 3.333 V

A

≤ +85°C VL 3.250 3.350 V

A

≥ 95% of the final battery voltage.

BAT

DO

VL

SYON

SYOFF

2.0 V

10 20 mA

10 mV

0.2 mV

0.8 V

0.4 0.8 V

5.0 7.0 mA

115 180 µA

EOC OUTPUT

Trip Point 100 kΩ to VL V
Hysteresis 100 kΩ to VL V

SHUTDOWN (SD)

ON SD
OFF SD
SD Input Current 0.2 1 µA

LOW DROPOUT REGULATOR

Output Voltage

Dropout Voltage (VCC – VL) I
Output Current Drive I

RESET OUTPUT

VL Rising Threshold RESET High 2.5 2.7 2.9 V
VL Falling Threshold RESET Low 2.4 2.55 2.8 V
Output High Logic Level 1 MΩ to Ground External 2.4 2.9 V

POWER SUPPLY

ON Supply Current No External Loads I
OFF Supply Current No External Loads I

6, 7

UVLO

VCC Rising Threshold Turn On 3.8 3.9 4.0 V
VCC Falling Threshold Turn Off, IVL = 1 mA 3.4 V

NOTES

1

VCC = V

2

See Figure 5.

3

VCS = (V

4

Accuracy guaranteed by ISET INPUT, Programming Function Accuracy specification.

5

EOC Output Comparator monitors charge current, and it is enabled when V

6

LDO is active during SD and UVLO.

7

Turn-off threshold depends on LDO dropout.

All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
Specifications subject to change without notice.

–3–REV. 0

ADP3801/ADP3802

TOP VIEW

(Not to Scale)

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

DRV

VL

SD

CS–
CS+

ISET

GND
A/B
BATA
BATB
PROG
ADJ

EOC

COMP

ADP3801
ADP3802

VCC

RESET

WARNING!

ESD SENSITIVE DEVICE

ABSOLUTE MAXIMUM RATINGS*

Input Voltage (VCC to GND) . . . . . . . . . . . . . . –0.3 V to 20 V

DRV, V

CS+

, V

to GND . . . . . . . . . . . . . . . . –0.3 V to VCC

CS–

BATA, BATB to GND . . . . . . . . . . . . . . . . . –0.3 V to 14.0 V

A/B, ISET, PROG, ADJ to GND . . . . . . . . . . . –0.3 V to VL

SD, RESET, COMP, EOC to GND . . . . . . . . . . –0.3 V to VL

Power Dissipation . . . . . . . . . . . . . . . . . . . . Internally Limited

θJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75°C/W

Ambient Temperature Range . . . . . . . . . . . . –40°C to +85°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Range (Soldering 10 sec) . . . . . . . +300°C

NOTES
*This is a stress rating only and functional operation of the device at these or any

other conditions above those indicated in the operation section of this specification
is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.

θ

is specified for worst case conditions with device soldered on a circuit board.

JA

PIN FUNCTION DESCRIPTIONS

Pin
Number Mnemonic Function

1 DRV External Transistor Drive
2 RESET Power on RESET Output
3 VCC Supply Voltage
4 VL LDO Output
5 SD Shutdown Control Input
6 CS– Negative Current Sense Input
7 CS+ Positive Current Sense Input
8 ISET Charge Current Program Input
9 COMP External Compensation Node
10 EOC End-of-Charge Output Signal

11 ADJ Adjust Battery Voltage ±

10%
12 PROG Program Final Battery Voltage Input
13 BATB Battery “B” Voltage Sense
14 BATA Battery “A” Voltage Sense
15 A/B

1

“A” or “B” Battery Select Input

16 GND Ground

NOTE

1

“L” = Battery “A.”

ORDERING GUIDE

Model Package Option Oscillator Frequency

ADP3801AR R-16A 200 kHz
ADP3802AR R-16A 500 kHz

PIN CONFIGURATION

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the ADP3801/ADP3802 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precau­tions are recommended to avoid performance degradation or loss of functionality.

–4–

REV. 0

Typical Performance Characteristics–ADP3801/ADP3802

SUPPLY VOLTAGE – Volts

LDO ACCURACY – %

4681012 1618

0

0.1

0.2

14 20

TA = +258C

–0.2

–0.1

100

VCC = 10V

= +258C

T

A

80

60

40

20

TOTAL NUMBEROF PARTS

0

–0.3

–0.5

–0.4

–0.2 0 0.2 0.4 0.6

V

Figure 2. V

15

10

5

0

–5

PERCENT CHANGE – %

BAT

V

–10

BAT

VCC = 10V
T

= +258C

A

–0.1

0.1 0.3 0.5

ACCURACY – %

BAT

Accuracy Distribution

0.4
VCC = 10V

0.3

0.2

0.1

0

ACCURACY – %

–0.1

BAT

V

–0.2

–0.3
–0.4

–40

Figure 3. V
Temperature

10

9

8

7

THRESHOLD – %

6

–20 0 20 40 60 80 100

TEMPERATURE – 8C

Accuracy vs.

BAT

VCC = 10V

0.3
TA = +258C

V

= 4.2V

BAT

0.2

0.1

0

ACCURACY – %

–0.1

BAT

V

–0.2

–0.3

6 8 10 12 14 18 20

SUPPLY VOLTAGE – Volts

Figure 4. V

Accuracy vs. Supply

BAT

16

Voltage

200

VCC = 10V

195

190

THRESHOLD – mV

185

–15

0 0.5 1.0 1.5 2.0 3.0 3.5

Figure 5. V

3.7
TA = +258C

3.6

3.5

3.4

UVLO TRIP POINT – Votts

3.3

01234 67

V

ADJ

Percent Change vs. V

BAT

LDO LOAD CURRENT – mA

2.5

– Volts

58910

Figure 8. UVLO Trip Point-Off vs.
LDO Load Current

ADJ

5

–40 –20 0 20 40 80 100

TEMPERATURE – 8C

60

Figure 6. Overvoltage Comparator
Threshold vs. Temperature

0.3
VCC = 10V

0.2

0.1

0

–0.1

LDO ACCURACY – %

–0.2

–0.3

–40

–20 0 20 40 60 80 100

TEMPERATURE – 8C

Figure 9. LDO Accuracy vs.
Temperature

180

–40 –20 0 20 40 80 100

TEMPERATURE – 8C

60

Figure 7. Overcurrent Comparator
Threshold vs. Temperature

Figure 10. LDO Accuracy vs. Supply
Voltage

–5–REV. 0

ADP3801/ADP3802

SATURATION VOLTAGE – Volts

–40 –20

40 60 80

0

0.2

100

VCC = 10V

200

0.4

0.3

TEMPERATURE – 8C

0.4
TA = +258C

0.3

0.2

DROPOUT VOLTAGE – Volts

0.1

01234 6758

LOAD CURRENT – mA

910

Figure 11. LDO Dropout Voltage vs.
Load Current

100

VCC = 10V
TA = +258C

80

60

40

DUTY CYCLE – %

20

0

0

0.5 2.0 2.5 3.0
V

1.51.0

COMP

– Volts

3.5

Figure 14. Duty Cycle vs. COMP Pin
Voltage

0

VCC = 10V

= +258C

T

A

–20

–40

–60

PSRR – dB

–80

–100

1.0E+01

= 1mF

C

LDO

1.0E+03 1.0E+04 1.0E+05 1.0E+06

1.0E+02
FREQUENCY – Hz

Figure 12. LDO PSRR vs. Frequency

12

10

8

6

4

DRV – Volts

2
0

1

2.00V

CH1

TIME – ns

VCC = 10V

= 1nF

C

L

T

= +258C

A

250ns/DIV

Figure 15. DRV Rise and Fall Times

215

ADP3801

VCC = 10V

205

195

FREQUENCY – kHz

185

175

–40 –20

0 20 40 80 10060
TEMPERATURE – 8C

Figure 13. Oscillator Frequency vs.
Temperature

9.40VCH1M 250ns

Figure 16. DRV High Saturation Volt­age vs. Temperature

3.9
VCC = 10V

3.8

3.7

3.6

CLAMP VOLTAGE – Volts

3.5

–40 –20

Figure 17. DRV Output Low Voltage
with VCC = 10 V vs. Temperature

40 60 80

200

TEMPERATURE – 8C

5.5

TA = +858C

5.0
TA = +258C

4.5

TA = –408C

NOT SWITCHING
SD = ON

12

100

4.0

POWER SUPPLY CURRENT – mA

3.5

48 16

SUPPLY VOLTAGE – Volts

Figure 18. Power Supply Current vs.
Supply Voltage @ Three Temperatures

–6–

15

VCC = 10V

= +258C

T

A

13

50% DUTY CYCLE

11

ADP3802

9

7

POWER SUPPLY CURRENT – mA

20

5

0 0.5 1.5

CAPACITIVE LOAD – nF

ADP3801

2.01.0

2.5

Figure 19. Power Supply Current vs.
Capacitive Load on DRV

REV. 0