Part number:
SC4538
Manufacturer:
Semtech Corporation
File Size:
276.54 KB
Description:
High effi ciency boost converter.
Datasheet Details
Part number:
SC4538
Manufacturer:
Semtech Corporation
File Size:
276.54 KB
Description:
High effi ciency boost converter.
SC4538, High Effi ciency Boost Converter
The SC4538 is designed to regulate current for a series chain of white LEDs in LCD backlighting applications where small size and high efficiency are priorities.
This device integrates an 800kHz current-mode PWM boost converter and a 30mA programmable low dropout current sink regulator.
An external
SC4538 Features
* Input voltage range
* 2.8V to 5.5V Current-mode PWM control
* 800kHz
* Programmable LED current up to 30mA
* Soft-start to reduce in-rush current
* PWM dimming
* 100Hz to 50kHz
* Analog and filtered-PWM dimming at ISET
* Over-voltage pr
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