AAT1401 Datasheet, PDF (2/19 Pages) List of Unclassifed Manufacturers – FOUR-CHANNEL DIGITAL STILL CAMERA POWER SUPPLY

DATA SHEET
AAT1401
Serial LED Driver with Filtered PWM and 32-Step S2C Dimming Control
Pin Descriptions
Pin #
A1
A2
A3
B1
B3
C1
C3
D1
D2
D3
Symbol
LX
IN
EN/SET
PGND
PWM
GND
COMP
CS
RSET
OVP
Function
Switching node of boost converter. Connect an inductor between LX and input supply (VIN); Schottky
rectifier anode is connected between LX pin while cathode is connected to output capacitor.
Supply input for the IC. Connect a 4.7µF 6.3V/10V ceramic capacitor from this pin to GND.
Enable on/off control and S²Cwire interface input.
Power ground pin.
Input PWM pin. Pull high to disable the PWM dimming feature.
Ground pin.
Compensation pin. Connect a capacitor from this pin to GND. Compensation components are mainly
related to the output capacitor valued. See the Capacitor Selection section in the Application Infor-
mation section of this datasheet.
Connect to the cathode of the last diode of the LED string.
Connect a resistor to GND to set maximum LED current up to 31mA.
Feedback pin for over-voltage protection.
Pin Configuration
WLCSP10 1.1 x1.5
(Top View)
A1 A2 A3
B1
B3
C1
C3
D1 D2 D3
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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202113A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 27, 2012