APM8601 datasheet(7/14 Pages) DIODES

7 / 14 page

APM8601

DUAL CHANNEL SINGLE CELL LINEAR LITHIUM BATTERY

CHARGER WITH 28V OVP and PROGRAMMABLE CHARGE

TIMER

APM8601

Document number: DS35138 Rev. 1 - 2

7 of 14

www.diodes.com

December 2010

Functional Description

APM8601 is a linear Li-Ion battery charger device for single-cell applications. It has dual power inputs (DC and USB) and the

charge currents can be programmed with the RSETI resistor and/or the USEL pin. The device also incorporates several safety

features, such as charge timers, battery temperature monitoring and internal thermal limiting.

Functional State Diagram

ANY STATE

EN = HIGH

VIN < VBAT

VIN < 4.0V

VIN > 7.5V

EN = LOW

AND VIN > VBAT

AND VIN > 4.0V

AND VIN < 7.5V

VBAT > 3V

Reset Timer

VBAT < 2.82V

Reset Timer

IBAT < 112.5 / RSETI

Reset Timer

IBAT > 172.5 / RSETI

Reset Timer

RTHM < 315Ω

(RTHM > 3.94kΩ

AND RTHM < 28.3kΩ)

(RTHM > 315Ω

AND RTHM < 3.94kΩ)

RTHM > 28.3kΩ

RTHM < 315Ω

(RTHM > 3.94kΩ

AND RTHM < 28.3kΩ)

(RTHM > 315Ω

AND RTHM < 3.94kΩ)

RTHM > 28.3kΩ

Time out

VBAT < 4.05V

Reset Timer

IBAT > 112.5 / RSETI

AND Time out

VBAT < 3V

AND Time out

DISABLE

POK

FLT

CHG

IBAT

PREQUAL

POK

FLT

CHG

IBAT

150 / RSETI

Timer Hold

THM

POK

FLT

CHG

IBAT

TOP-OFF

POK

FLT

CHG

CHARGE

POK

FLT

CHG

IBAT (USB)

USEL Setting

IBAT (DC)

1500 / RSETI

DONE

POK

FLT

CHG

IBAT

Timer Hold

THM

POK

FLT

CHG

IBAT

FAULT

POK

FLT

CHG

IBAT

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