Pin Descriptions

Pin Configuration

QFN44-24

(Top View)

1

3

2

5

4

6

18

16

17

14

15

13

C1-

C1+

VOUT_FL

VIN

EN_FL

N/C

GND

D1

VIN

GND

D2

D3

AAT2803

Pin #

Symbol

Function

1

C1-

Flying capacitor 1 negative terminal.

2

C1+

Flying capacitor 1 positive terminal. Connect a 1μF capacitor between C1+ and C1-.

3

VOUT_FL

Flash output voltage. Requires 1μF capacitor connected between this pin and ground.

4, 14

VIN

Input power supply. Requires 1μF capacitor connected between this pin and ground.

5

EN_FL

nected low, the flash charge pump shuts down and consumes less than 1μA of current.

6, 7, 23

N/C

No connect.

8

VOUT_BL

Backlight output voltage charge pump. Requires 1μF capacitor connected between this

pin and ground.

9

C2+

Flying capacitor 2 positive terminal. Connect a 1μF capacitor between C2+ and C2-.

10

C3+

Flying capacitor 3 positive terminal. Connect a 1μF capacitor between C3+ and C3-.

11

C3-

Flying capacitor 3 negative terminal.

12

C2-

Flying capacitor 2 negative terminal.

13, 15, 24

GND

Ground.

16

D1

Current sink input #1.

17

D2

Current sink input #2.

18

D3

Current sink input #3.

19

D5

Current sink input #5.

20

D4

Current sink input #4.

21

D6

Current sink input #6.

22

EN/SET

settings for all six channels. This pin should not be left floating.

EP

Exposed paddle (bottom); connect to GND directly beneath package.

AAT2803

Six-Channel White LED Backlight

Charge Pump with Flash

2

2803.2006.12.1.6