apm8600 Diodes, Inc., apm8600 Datasheet - Page 2

• Manufacturer Part Number: apm8600
• Description: Single Cell Linear Lithium Battery Charger With 28v Ovp And Programmable Charge Timer
• Manufacturer: Diodes, Inc.

Pin Descriptions
APM8600
Document number: DS35140 Rev. 1 - 2
Name
POK
CHG
SETI
THM
GND
DNC
FLT
BAT
EN
DC
NC
CT
12, 13
Pin #
1, 7
EP
7,9
10
11
14
2
3
4
5
8
6
Connection to the
Thermistor Input
Do Not Connect Must not connect
Charge Current
Not Connected
Charge Timing
Charge Status
programming
Exposed Pad
(active-low)
(active-low)
(active-low)
(active-low)
Power OK
Fault Flag
DC Input
Ground
Battery
Enable
The battery is charged via this pin and the BAT voltage is constantly monitored.
Connect a bypass capacitor between BAT and GND (2.2µF).
The maximum charge current is programmed using a resistor from SETI to GND.
This also determines the prequal current charging level and top-off threshold.
To monitor the battery temperature, connect a 10kΩ NTC thermistor. Place this
thermistor as close as possible to the battery. Connect THM to GND if
temperature measurement is not required.
Ground connection.
Connecting a capacitor from CT to GND will set the time-outs for prequal, top-off
and fast-charge. Connecting CT direct to GND disables these timers.
The charger is enabled when this input is low. To start the charger connect
GND. Drive this input high to disable the charger.
When a valid input source is connected, this open-drain output is pulled low.
Open-drain output that indicates the charging status. It is active only in the fast-
charge state and goes high-impedance when the charger is either disabled or in
prequal or top-off mode.
DC supply input. The recommended input voltage is between 4.32V and 7V. This
input is capable of withstanding up to 28V. Connect both DC pins together on the
PCB. It is recommended to connect a bypass capacitor (1µF) from DC to GND.
If the prequal or fast-charge timers expire and the charging threshold voltage is
not reached,
power or raise
For optimal thermal performance connect to copper on PCB (electrically this can
be GND).
Floating pins
WITH 28V OVP AND PROGRAMMABLE CHARGE TIMER
SINGLE CELL LINEAR LITHIUM BATTERY CHARGER
www.diodes.com
FLT
EN
(open-drain output) will go low. Remove the fault by cycling
2 of 14
.
Description
APM8600
© Diodes Incorporated
December 2010
EN
to