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M62253BGP

Charge Control IC for Li-Ion Batteries

Renesas Electronics 

M62253BGP

Charge Control IC for Li-Ion Batteries

REJ03F0243-0200

Rev.2.00

Sep 14, 2007

Description

M62253BGP is a charge control IC dedicated to Lithium-ion batteries. Constant current/voltage charging suitable for

Li-Ion batteries are available by utilizing on-chip current/voltage control circuits.

It also includes charge inhibit function for over discharged battery and charge control function detecting battery

temperature, allowing for easy configuration of Li-Ion battery charging circuit.

Features

• Available for 4.2 V battery

• High precision reference voltage 4.2 V ± 30 mV

• Constant current and constant voltage charging

• Charge completion detection voltage settable by external resistors

• Charging inhibit and protection function for over discharged battery

• Charging inhibit and protection function for both high and low temperature battery

• Dual LED indications monitoring charging status

• Recharging function (LED2 remains turned on after recharging)

• Delay circuit to prevent erroneous detection

Applications

Li-Ion battery charger for hand-held instruments such as cellular phones and notebook computers

Block Diagram

VDD

C1

VCC

LED2

LED1

4.2 V

+

−

Regulated supply

4.53 V

4.1 V⇔3.99 V

−

+

Erroneous

detection

prevention

−

+

3.07 V

+

−

1.54 V

OE

OUT

Constant current

control

ISENSE+

ISET

ISENSE-

OUT

SENSE+

OE

OUT

Constant voltage

control

VSET

VSENSE

Erroneous

detection

prevention

Erroneous

detection

prevention

Current

detection

1.49 V

3.21 V

SENSE−

VSENSE

ADJ

TIN

GND

C3 C2

REJ03F0243-0200 Rev.2.00 Sep 14, 2007

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