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AN3263
| Title |
Title
External Soft Start and Dimming Control for DC-DC Boost LED Driver
|
|---|---|
| Name |
Name
AN3263
|
| Date |
Date
10/03/2019
|
| Description |
Description
The proliferation of portable electronic devices with Liquid Crystal Displays (LCDs), such as smart phones, handheld games and portable computers, has increased the demand for using white LEDs as a backlight source for the LCDs. The white LEDs are used as a light source because of their high efficiency, small size, lower cost and long operating life. Series string clusters of LEDs are usually used for higher brightness and better brightness matching between LEDs; therefore, a high-efficiency DC-DC boost converter is used to drive the LEDs in series for the LCD backlight in these battery-powered handheld electronic devices. In this application note, some external soft start and dimming control circuits for simple DC-DC boost LED drivers will be discussed..
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