AT1312A/B/C
Preliminary Product Information
High Efficiency, Constant Current
White-LEDs Driver
Feature
•Operating Voltage:2.5V to 6.0V.
Description
The AT1312A/B/C step-up converter drives white
LEDs with a constant current to provide backlight in
•High Operating Frequency: 1MHz
cell phones, PDAs, and other hand-held devices. It
•High Output Voltage: Up to 16V/23V/28V
features allowing series connection of the white
LEDs so that the LED currents are identical for
•Shutdown Current <1µA
uniform brightness. An enable input can be pulsed
•16V/23V/28V Output Over-Voltage Protection repeatedly to adjust LED’s brightness. The fast 1.0
•Digital Dimming Control.
MHz current-mode PWM control allows for smaller
capacitor and inductor. Fault condition protection
•Built-in Cycle-by Cycle Current-Limiting.
uses cycle-by-cycle current limiting to sense
•Built-in Soft-Start Function.
maximum inductor current, thermal protection and
•0.2V Low Reference Voltage
over-voltage protection. Also included soft-start
eliminates inrush current during start-up. The 0.2V
•Tiny SOT-26 Package
low reference voltage minimized the power loss
across the current-setting resistor.
Application
• LED Module
• Compact Back Light Module
• Constant Current Source
The AT1312A/B/C is available in 6-pin SOT-26
packages.
Block Diagram
Aimtron reserves the right without notice to change this circuitry and specifications.
7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW:
http://www.aimtron.com.tw
2/23/2006 REV:1.1
Email:
service@aimtron.com.tw
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AIMTRON [ AIMTRON TECHNOLOGY ]
