AAT3663 Datasheet, PDF (2/22 Pages) Advanced Analogic Technologies – 1A Linear Li-Ion Battery Charger for Single and Dual Cell Applications

AAT3663
1A Linear Li-Ion Battery Charger
for Single and Dual Cell Applications
Pin Description
Pin #
1
2
3
4
5
6
7
8, 9
10
11
12
13
14
Symbol
EN
CT
ISET
GND
TS
BATS
BAT
IN
STAT1
STAT2
ADPP#
TERM
N/C
Type
I
I
I
I/O
I/O
I
O
I
O
O
O
I
Function
Enable pin, Active high with internal pull-down. If not used, pull high to the IN pin to
continuously enable the charger IC when input power is applied.
Charge timer programming pin. A 0.1µF ceramic capacitor should be connected
between this pin and GND. Connect directly to GND to disable the timer function.
Charge current programming pin. Connect a resistor between this pin and GND to
program the constant fast charge current.
IC ground connection. Connect this pin to power ground.
Battery temperature sense input. Connect the Li-Ion battery pack NTC resistor termi-
nal to this pin.
Battery voltage sense pin. Connect this pin directly to the positive battery terminal. If
this function is not used, connect to the BAT pin directly.
Battery charge output pin. Connect to the positive battery terminal.
Power supply input pin. Connect the input USB port or Adapter power source to this pin
Charge status pin, open-drain output. Connect the STAT1 LED with a series ballast
resistor between IN and this pin.
Charge status pin, open-drain output. Connect the STAT2 LED with a series ballast
resistor between IN and this pin.
Input supply power-good status pin, open-drain output. Connect the ADPP# status
LED with a series ballast resistor between IN and this pin.
Charge termination current programming input pin. Connect a resistor between this
pin and GND to program the charge termination current. When TERM is open, the
termination current is 10% (default sertting) of the set maximum charge current.
No connection.
Pin Configuration
TDFN33-14
(Top View)
EN ¹
CT ²
ISET ³
GND ⁴
TS ⁵
BATS ⁶
BAT ⁷
14 _N/C
13 _TERM
12 _ADPP#
11 _STAT2
10 _STAT1
9 _IN
8 _IN
2
3663.2007.10.1.0