APM8601 Datasheet, PDF (7/14 Pages) Diodes Incorporated – DUAL CHANNEL SINGLE CELL LINEAR LITHIUM BATTERY CHARGER WITH 28V

APM8601
DUAL CHANNEL SINGLE CELL LINEAR LITHIUM BATTERY
CHARGER WITH 28V OVP and PROGRAMMABLE CHARGE
TIMER
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 R_SETI 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
OR V_IN < V_BAT
OR V_IN < 4.0V
OR V_IN > 7.5V
DISABLE
POK 1 FLT 1 CHG 1
I_BAT
0A
THM
R_THM < 315Ω
OR (R_THM > 3.94kΩ
AND R_THM < 28.3kΩ)
EN = LOW
AND V_IN > V_BAT
AND V_IN > 4.0V
AND V_IN < 7.5V
PREQUAL
POK
CHG
0 FLT 1
POK 0 FLT 1 CHG 1
1 I_BAT 0A
Timer Hold
I_BAT
150 / R_SETI
(R_THM > 315Ω
AND R_THM < 3.94kΩ)
OR R_THM > 28.3kΩ
V_BAT < 2.82V
Reset Timer
R_THM < 315Ω
OR (R_THM > 3.94kΩ
AND R_THM < 28.3kΩ)
V_BAT > 3V
Reset Timer
V_BAT < 3V
AND Time out
FAULT
POK 0 FLT 0
CHG 1 I_BAT 0A
POK
CHG
THM
0 FLT
0 I_BAT
Timer Hold
CHARGE
1
POK 0 FLT 1 CHG 0
0A
I_BAT (USB)
I_BAT (DC)
USEL Setting
1500 / R_SETI
(R_THM > 315Ω
AND R_THM < 3.94kΩ)
OR R_THM > 28.3kΩ
I_BAT > 172.5 / R_SETI
Reset Timer
I_BAT < 112.5 / R_SETI
Reset Timer
I_BAT > 112.5 / R_SETI
AND Time out
TOP-OFF
POK 0 FLT 1 CHG 1
V_BAT < 4.05V
Reset Timer
Time out
DONE
POK 0 FLT 1 CHG 1
I_BAT
0A
APM8601
Document number: DS35138 Rev. 1 - 2
7 of 14
www.diodes.com
December 2010
© Diodes Incorporated