AAT2803 Datasheet, PDF (2/16 Pages) Advanced Analogic Technologies – Six-Channel White LED Backlight Charge Pump with Flash

AAT2803
Six-Channel White LED Backlight
Charge Pump with Flash
Pin Descriptions
Pin #
1
2
3
4, 14
5
Symbol
C1-
C1+
VOUT_FL
VIN
EN_FL
6, 7, 23
8
N/C
VOUT_BL
9
10
11
12
13, 15, 24
16
17
18
19
20
21
22
C2+
C3+
C3-
C2-
GND
D1
D2
D3
D5
D4
D6
EN/SET
EP
Function
Flying capacitor 1 negative terminal.
Flying capacitor 1 positive terminal. Connect a 1μF capacitor between C1+ and C1-.
Flash output voltage. Requires 1μF capacitor connected between this pin and ground.
Input power supply. Requires 1μF capacitor connected between this pin and ground.
Enable pin for flash charge pump. For normal operation, connect to V_IN. When con-
nected low, the flash charge pump shuts down and consumes less than 1μA of current.
No connect.
Backlight output voltage charge pump. Requires 1μF capacitor connected between this
pin and ground.
Flying capacitor 2 positive terminal. Connect a 1μF capacitor between C2+ and C2-.
Flying capacitor 3 positive terminal. Connect a 1μF capacitor between C3+ and C3-.
Flying capacitor 3 negative terminal.
Flying capacitor 2 negative terminal.
Ground.
Current sink input #1.
Current sink input #2.
Current sink input #3.
Current sink input #5.
Current sink input #4.
Current sink input #6.
AS²Cwire serial interface control pin for backlight charge pump. It controls the current
settings for all six channels. This pin should not be left floating.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
QFN44-24
(Top View)
C1- ¹
C1+ ²
VOUT_FL ³
VIN ⁴
EN_FL ⁵
N/C ⁶
AAT2803
18 _D3
17 _D2
16 _D1
15 _GND
14 _VIN
13 _GND
2
2803.2006.12.1.6