ADP3820AR-41 Analog Devices, ADP3820AR-41 Datasheet

ADP3820AR-41

Manufacturer Part Number

ADP3820AR-41

Description

Lithium-Ion Battery Charger

Manufacturer

Analog Devices

Datasheet

1.ADP3820AR-41.pdf (8 pages)

Current page: 1 of 8
Download datasheet (113Kb)

GENERAL DESCRIPTION

The ADP3820 is a precision single cell Li-Ion battery charge

controller that can be used with an external Power PMOS de-

vice to form a two-chip, low cost, low dropout linear battery

charger. It is available in two voltage options to accommodate

Li-Ion batteries with coke or graphite anodes. The ADP3820’s

high accuracy ( 1%) low shutdown current (1 A) and easy

charge current programming make this device especially attrac-

tive as a battery charge controller.

Charge current can be set by an external resistor. For example,

50 m of resistance can be used to set the charge current to

1 A. Additional features of this device include foldback current

limit, overload recovery, and a gate-to-source voltage clamp to

protect the external MOSFET. The proprietary circuit also

minimizes the reverse leakage current from the battery if the

input voltage of the charger is disconnected. This feature elimi-

nates the need for an external serial blocking diode.

The ADP3820 operates with a wide input voltage range from

4.5 V to 15 V. It is specified over the industrial temperature

range of –20 C to +85 C and is available in the ultrasmall

6-lead surface mount SOT-23-6 and 8-lead SOIC packages.

REV. A

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.

FEATURES

630 A Typical Quiescent Current

Shutdown Current: 1 A (Typical)

Stable with 10 F Load Capacitor

4.5 V to 15 V Input Operating Range

Integrated Reverse Leakage Protection

6-Lead SOT-23-6 and 8-Lead SO-8 Packages

Programmable Charge Current

–20 C to +85 C Ambient Temperature Range

Internal Gate-to-Source Protective Clamp

APPLICATIONS

Li-Ion Battery Chargers

Desktop Computers

Hand-Held Instruments

Cellular Telephones

Battery Operated Devices

1% Total Accuracy

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

+5V

10k

Figure 1. Li-Ion Charger Application Circuit

10 F

FUNCTIONAL BLOCK DIAGRAM

–

ADP3820

REF

World Wide Web Site: http://www.analog.com

50m

ADP3820-xx

BIAS

GND

Battery Charger

GND

NDP6020P

GATE

50mV

OUT

–

Lithium-Ion

ADP3820

GATE

22 F

= 1A

OUT

Li-Ion

BATTERY

OUT

Related parts for ADP3820AR-41

Related keywords

ADP3820AR-41 datasheet
ADP3820AR-41 data sheet
ADP3820AR-41 pdf datasheet
ADP3820AR-41 component
ADP3820AR-41 part
ADP3820AR-41 distributor
ADP3820AR-41 RoHS
ADP3820AR-41 datasheet download