Analog Devices ADP3811AR, ADP3810AR-8.4, ADP3810AR-4.2, ADP3810AR-16.8, ADP3810AR-12.6 Datasheet

Secondary Side, Off-Line

a

FEATURES
Programmable Charge Current
High Precision Battery Voltage Limit
Precision 2.000 V Reference
Low Voltage Drop Current Sense: 300 mV Full Scale
Full Operation in Shorted and Open Battery Conditions
Drives Diode-Side of Optocoupler
Wide Operating Supply Range: 2.7 V to 16 V
Undervoltage Lockout
SO-8 Package
ADP3810

Internal Precision Voltage Divider for Battery Sense
Four Final Battery Voltage Options Available: 4.2 V,

8.4 V, 12.6 V, 16.8 V

ADP3811

Adjustable Final Battery Voltage

APPLICATIONS
Battery Charger Controller for:

LiIon Batteries (ADP3810)
NiCad, NiMH Batteries (ADP3811)

GENERAL DESCRIPTION

The ADP3810 and ADP3811 combine a programmable current
limit with a battery voltage limit to provide a constant current,
constant voltage battery charger controller. In secondary side,

Battery Charger Controllers

ADP3810/ADP3811

off-line applications, the output directly drives the diode side of
an optocoupler to give isolated feedback control of a primary
side PWM. The circuitry includes two gain (g
sion 2.0 V reference, a control input buffer, an Undervoltage
Lock Out (UVLO) comparator, an output buffer and an over­voltage comparator.

The current limit amplifier senses the voltage drop across an
external sense resistor to control the average current for charg­ing a battery. The voltage drop can be adjusted from 25 mV
to 300 mV, giving a charging current limit from 100 mA to

1.2 amps with a 0.25 Ω sense resistor. An external dc voltage
on the V

input sets the voltage drop. Because this input

CTRL

is high impedance, a filtered PWM output can be used to set
the voltage.

As the battery voltage approaches its voltage limit, the voltage
sense amplifier takes over to maintain a constant battery volt­age. The two amplifiers essentially operate in an “OR” fash­ion. Either the current is limited, or the voltage is limited.

The ADP3810 has internal thin-film resistors that are trimmed
to provide a precise final voltage for LiIon batteries. Four volt­age options are available, corresponding to 1-4 LiIon cells as
follows: 4.2 V, 8.4 V, 12.6 V and 16.8 V.

The ADP3811 omits these resistors allowing any battery volt­age to be programmed with external resistors.

) stages, a preci-

m

FUNCTIONAL BLOCK DIAGRAM

UVLO

GM

V

CS

GM1

V

CTRL

V

REF

GND

1.5MΩ 80kΩ

OUT

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.

V

V

CC

UVLO

UVLO

ADP3810/

ADP3811

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., 1996

V

SENSE

REF

ADP3810

R1

V

REF

ONLY

R2

GM2

COMP

ADP3810/ADP3811–SPECIFICATIONS

(–408C ≤ TA ≤ +858C, VCC = 10.0 V, unless otherwise noted)

ADP3810

Parameter Conditions Symbol Min Typ Max Units

CURRENT SENSE

Full-Scale Current Sense Voltage V
Minimum Current Sense Voltage 0.0 V ≤ V
Current Programming Input Range V
Gain (V

OUT/VCS

Control Input Bias Current V

VOLTAGE SENSE

Accuracy

2

—ADP3810 –1.0 +1.0 %
Input Resistance—ADP3810 4.2 V Option R
Input Resistance—ADP3810 8.4 V Option R
Input Resistance—ADP3810 12.6 V Option R
Input Resistance—ADP3810 16.8 V Option R
Offset Voltage—ADP3811 V
Bias Current—ADP3811 I
Gain (V

OUT/VSENSE

REFERENCE

Output Voltage C

1

= 1.2 V –315 –300 –285 mV

CTRL

)R

3

)

= 1 kΩ A

L

Pin I

CTRL

R

= 1 kΩ A

L

= 0.1 µF

L

≤ 0.1 V –32 –25 –18 mV

CTRL

4

CTRL
VCS

BCTRL

IN
IN
IN
IN
OS

B

VBAT

V

REF

0.0 1.2 V
74 86 dB

10 40 nA

210k Ω
420k Ω
630k Ω
840k Ω

–2.5 +2.5 mV

110 nA

60 74 dB

2.000 V

Accuracy

ADP3810 –1.0 +1.0 %

ADP3811 –1.8 +1.8 %
Load Regulation I
Line Regulation V
Output Voltage Noise 0.1 Hz to 10 Hz e
Load Current (Sourcing) I

= 0 mA to 5 mA –0.25 +0.25 %

LOAD

= 2.7 V to 16 V 0.004 0.02 %/V

CC

N

L

510 mA

35 µV p-p

OUTPUT

Output Current V
Saturation Voltage I
Gain (V

OUT/VCOMP

)R

= 2.7 V I

CC

= 4 mA, VCC–V

OUT

= 1 kΩ A

L

OUT

OUT

V

SAT
VOUT

46 mA

0.1 0.4 V
6 V/V

UNDERVOLTAGE LOCKOUT

Trip Point-On 2.65 2.7 V
Trip Point-Off 2.5 2.6 V

POWER SUPPLY

Operating Range 2.7 16 V
Quiescent Current V
Turn-Off Current V

≥ 2.7 V I

CC

≤ 2.5 V 0.5 1 mA

CC

Q

1.5 3 mA

OVERVOLTAGE COMPARATOR

Threshold

ADP3810 Percent Above Full Scale

ADP3811 Percent Above Full Scale
Response Time I

NOTES

1

20 kΩ resistor from current sense voltage to V

2

Applies to 4.2 V, 8.4 V, 12.6 V and 16.8 V options. Includes all error from offset voltage, bias current, resistor divider and voltage reference.

3

Does not include attenuation of input resistor divider for ADP3810.

4

0.1 µF load capacitor required for reference operation.

5

Full scale is the programmed final battery voltage: 4.2 V, 8.4 V, 12.6 V or 16.8 V for the ADP3810 or 2.0 V at V

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

CS

pin.

from 0 mA to 2 mA t

OUT

5

VOV%6%

5

VOV%6%

r

for the ADP3811.

SENSE

8 µs

–2–

REV. 0

ADP3810/ADP3811

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . –0.4 V to 18 V

V

, VCS Input Range . . . . . . . . . . . . . . . . . . –0.4 V to V

CTRL

V

Input Range (ADP3811) . . . . . . . . . . . . –0.4 V to V

SENSE

V

Input Range (ADP3810) . . . . . . . . . . . –0.4 V to 20 V

SENSE

CC
CC

Maximum Power Dissipation . . . . . . . . . . . . . . . . . . 500 mW

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

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

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

ORDERING GUIDE

Temperature Package Battery

Model Range Option Voltage

ADP3810AR-4.2 –40°C to +85°C SO-8 4.2 V

ADP3810AR-8.4 –40°C to +85°C SO-8 8.4 V

ADP3810AR-12.6 –40°C to +85°C SO-8 12.6 V

ADP3810AR-16.8 –40°C to +85°C SO-8 16.8 V

ADP3811AR –40°C to +85°C SO-8 Adjustable

OUT

GND

RETURN

V

RCS

R3

0.1µF

IN

CTRL

DC/DC

CONVERTER

V

IN

PIN CONFIGURATION

8

V

SENSE

COMP

V

OUT

CS

1

ADP3810

2

ADP3811

TOP VIEW

3

(Not to Scale)

4

V

CC

7

V

REF

6

GND
V

5

CTRL

PIN DESCRIPTION

Mnemonic Function

V

SENSE

V

CS

V

REF

Battery Voltage Sense Input.
Current Sense Input.

Reference Output. Nominally 2.0 V.
COMP External Compensation Pin.
OUT Optocoupler Current Output Drive.
V
V

CTRL

CC

DC Control Input to Set Current Limit, 0 V to 1.2 V.

Positive Supply.
GND Ground Pin.

V

BAT

I

R1

R2

CHARGE

ADP3811

ONLY

R

CS

2.0V

0.1µF

BATTERY

V

V

REF

1.5MΩ

V

CTRL

BUFFER

I

OUT

OUT

CS

80kΩ

GM1

UVLO

GM3

200Ω

1.2V

V

CC

UVLO

UVLO

ADP3810/

ADP3811

COMP

REF

GND

V

R1

GM2

SENSE

ADP3810

R2

ONLY

V

V

REF

100µA

C

C

R

C

Figure 1. Simplified Battery Charger

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 ADP3810/ADP3811 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.

WARNING!

ESD SENSITIVE DEVICE

REV. 0

–3–

ADP3810/ADP3811

TEMPERATURE – °C

REFERENCE DROPOUT VOLTAGE – Volts

0.12

0.04
–50 –25 100

0255075

0.10

0.08

0.06

0.14

V

CC

= +10V

I

L

= 5mA

C

L

= 0.1µF

CONTROL VOLTAGE, V

CTRL

– Volts

CHARGE CURRENT – Amps

1.6

1.4

0

0 0.2 1.4

0.4 0.6 0.8 1.0

1.2

1.0

0.2

0.8

0.6

0.4

1.2

RCS = 0.25Ω
R3 = 20kΩ

–Typical Performance Characteristics

2.004
2 TYPICAL PARTS

2.002

2.000

1.998

1.996

REFERENCE VOLTAGE – Volts

1.994

–50 –25 100

0255075

TEMPERATURE – °C

V

CC

I

= 100µA

L

C

L

= +10V

= 0.1µF

Figure 2. Reference Output Voltage
vs. Temperature for Two Typical Parts

–20

V

= +10V

CC

I

= 100µA

–30

L

C

= 0.1µF

L

–40

–50

PSRR – dB

–60

250

V

= +10V

CC

C

= 0.1µF

L

200

150

100

50

DROPOUT VOLTAGE – mV

0

03 18

6 9 12 15

LOAD CURRENT – mA

Figure 3. Reference Drop-Out Volt
age (V

3000

Hz

√

2500

2000

1500

1000

) vs. Load Current

CC–VREF

V

= +10V

CC

I

= 100µA

L

CL = 0.1µF

Figure 4. Reference Dropout Voltage
vs. Temperature

–70

–80

100 1k 1M

FREQUENCY – Hz

Figure 5. Reference PSRR vs.
Frequency

–294

–296

–298

–300

–302

CURRENT SENSE VOLTAGE – mV

–304

–50 –25 100

Figure 8. Full-Scale Current Sense
Voltage vs. Temperature

0255075

TEMPERATURE – °C

10k 100k

VCC = +10V
R3 = 20kΩ

500

REFERENCE NOISE DENSITY – nV/

0

1 10 10k

100 1k

FREQUENCY – Hz

Figure 6. Reference Noise Density
vs. Frequency

–294

V

= +10V

CC

R3 = 20kΩ

–296

–298

–300

–302

CURRENT SENSE VOLTAGE – mV

–304

24 16

6 8 10 12 14

SUPPLY VOLTAGE, VCC – Volts

Figure 9. Full-Scale Current Sense
Voltage vs. V

CC

–4–

Figure 7. Charge Current vs. Control
Voltage

100

80

GAIN

60

40

20

0

PHASE

–20

OPEN-LOOP GAIN – dB

–40

–60

100 1k

10 1M10k

FREQUENCY – Hz

C
T
V

COMP
A
CC

= 0.01µF

= +25°C

= +10V

100k

0

45

90

135

180

225

Figure 10. GM1 Open-Loop Gain and
Phase vs. Frequency

REV. 0

PHASE SHIFT – Degrees

ADP3810/ADP3811

SUPPLY VOLTAGE, VCC – Volts

1.0

0.5

–1.5

03 18

6 9 12 15

0

–0.5

–1.0

VOLTAGE SENSE ACCURACY – %

TA = +25°C

TEMPERATURE – °C

V

SENSE

BIAS CURRENT – nA

2.5

2.0

0

–50 –25 100

0255075

1.5

1.0

0.5

VCC = +10V

TEMPERATURE – °C

V

OV%

– %

12

10

2

–50 –25 100

0255075

8

6

4

VCC = +10V

100

80

GAIN

60

40

20

0

PHASE

–20

OPEN-LOOP GAIN – dB

–40

–60

100 1k

10 1M10k

FREQUENCY – Hz

C
T

A

V

CC

COMP

= +25°C

= +10V

= 0.01µF

100k

0

45

90

135

180

225

Figure 11. GM2 Open-Loop Gain and
Phase vs. Frequency

1.0

0.5

0

–0.5

GM2 OFFSET – mV

–1.0

VCC = +10V

1.0
V

= +10V

CC

0.5

0

–0.5

–1.0

VOLTAGE SENSE ACCURACY – %

PHASE SHIFT – Degrees

–1.5

–50 –25 1000 255075

TEMPERATURE – °C

Figure 12. ADP3810 Voltage Sense
Accuracy vs. Temperature

1.0

TA = +25°C

0.5

0

–0.5

GM2 OFFSET – mV

–1.0

Figure 13. ADP3810 Voltage Sense
Accuracy vs. V

CC

–1.5

–50 –25 100

0255075

TEMPERATURE – °C

Figure 14. ADP3811 GM2 Offset vs.
Temperature

2.5

2.0

1.5

1.0

BIAS CURRENT – nA

SENSE

0.5

V

0

03 18

6 9 12 15

SUPPLY VOLTAGE, VCC – Volts

Figure 17. ADP3811 V
Current vs. V

CC

TA = +25°C

Bias

SENSE

–1.5

03 18

6 9 12 15

SUPPLY VOLTAGE, VCC – Volts

Figure 15. ADP3811, GM2 Offset
vs. V

CC

120

V

= +10V

CC

T

= +25°C

A

100

80

60

40

QUANTITY – Parts

20

0

5.0 5.2 5.4 5.6 5.8 6.0 6.2 6.4 6.6 6.8 7.0
V

– %

OV%

Figure 18. Overvoltage Comparator
Distribution (V

OV%

)

Figure 16. ADP3811 V

SENSE

Bias

Current vs. Temperature

Figure 19. Overvoltage Comparator
Threshold (V

vs. Temperature

OV%)

REV. 0

–5–