AATIAN107 Datasheet, PDF (1/8 Pages) SiGe Semiconductor, Inc. – S2Cwire Controlled, Serial LED Boost Driver

AHK1421 EVAL :
EVALUATION BOARD DATASHEET
EV-184
S²Cwire Controlled, Serial LED Boost Driver
Introduction
The AHK1421 evaluation board demonstrates functionality of the AHK1421 and its application as a white LED backlight
driver under AnalogicTech’s S²Cwire serial digital interface control.
The AHK1421 is a high frequency, high efficiency, constant-current boost converter driving six white LEDs in series
configuration. The input voltage is 2.7V to 5.5V, which is ideal for portable devices powered by single-cell lithium-ion/
polymer (Li-ion) batteries. The maximum LED current is set by an external resistor from 10 to 31mA. The AHK1421 is
programmable with the S²Cwire interface, using an onboard microcontroller which is capable of brightening and dim-
ming the LEDs in 32 discrete steps.
This document describes the evaluation board and its accompanying user interface. A brief “Getting Started” section
is included to help the user to begin operating the evaluation board.
Board Pictures
(a) Top
Figure 1: AHK1421 Evaluation Board
(b) Bottom
EV-184.2011.05.1.0
www.analogictech.com
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