AAT3170_08 Datasheet, PDF (2/15 Pages) Advanced Analogic Technologies – High Current LED Flash Driver Charge Pump IC

ChargePump^TM
PRODUCT DATASHEET
AAT3170
High Current LED Flash Driver Charge Pump IC
Pin Descriptions
Pin #
1, 12
2
3
4
5
6
7
8
9
10
11
EP
Symbol
VIN
C1+
C1-
GND
F1
F2
EN/SET
CT
C2-
C2+
VOUT
Function
Input power supply pin. Requires 4.7μF or larger ceramic bypass capacitor to ground.
Flying capacitor C1 positive terminal. Connect a 1μF ceramic capacitor between C1+ and C1-.
Flying capacitor C1 negative terminal.
Ground connection.
Current sink input #1.
Current sink input #2.
AS²Cwire serial interface control pin.
Flash timer control capacitor input. Connect a 100nF capacitor from CT to GND for a one second timeout
duration.
Flying capacitor C2 negative terminal.
Flying capacitor C2 positive terminal. Connect a 1μF ceramic capacitor between C2+ and C2-.
Charge pump output. Requires 2.2μF or larger ceramic capacitor connected between this pin and ground.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
TDFN33-12
(Top View)
VIN ¹
C1+ ²
C1- ³
GND ⁴
F1 ⁵
F2 ⁶
12 _VIN
11 _VOUT
10 _C2+
9 _C2-
8 _CT
7 _EN/SET
2
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3170.2007.11.1.2