Diodes APM8600 - Manual (Page 7)

APM8600
SINGLE CELL LINEAR LITHIUM BATTERY CHARGER
WITH 28V OVP AND PROGRAMMABLE CHARGE TIMER
APM8600
Document number: DS35140 Rev. 1 - 2
7 of 14
www.diodes.com
December 2010
© Diodes Incorporated
NEW PROD
UC
T
Functional Description
APM8600 is a linear Li-Ion battery charger device for single-cell applications. Charge currents can be programmed with the
R
SETI
resistor. 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
EN = LOW
AND V
IN
> V
BAT
AND V
IN
> 4.0V
AND V
IN
< 7.5V
V
BAT
> 3V
Reset Timer
V
BAT
< 2.82V
Reset Timer
I
BAT
< 112.5 / R
SETI
Reset Timer
I
BAT
> 172.5 / R
SETI
Reset Timer
R
THM
< 315 Ω
OR (R
THM
> 3.94k Ω
AND R
THM
< 28.3k Ω)
(R
THM
> 315 Ω
AND R
THM
< 3.94k Ω)
OR R
THM
> 28.3k Ω
R
THM
< 315 Ω
OR (R
THM
> 3.94k Ω
AND R
THM
< 28.3k Ω)
(R
THM
> 315 Ω
AND R
THM
< 3.94k Ω)
OR R
THM
> 28.3k Ω
Time out
V
BAT
< 4.05V
Reset Timer
I
BAT
> 112.5 / R
SETI
AND Time out
V
BAT
< 3V
AND Time out
DISABLE
POK 1 FLT 1 CHG 1
I
BAT
0A
PREQUAL
POK 0 FLT 1 CHG 1
I
BAT
150 / R
SETI
Timer Hold
THM
POK 0 FLT 1
CHG 1 I
BAT
0A
TOP-OFF
POK 0 FLT 1 CHG 1
CHARGE
POK 0 FLT 1 CHG 0
I
BAT (DC) 1500 / R
SETI
DONE
POK 0 FLT 1 CHG 1
I
BAT
0A
Timer Hold
THM
POK 0 FLT 1
CHG 0 I
BAT
0A
FAULT
POK 0 FLT 0
CHG 1 I
BAT
0A