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SGM3122

Part Number	SGM3122
Manufacturer	Shengbang Microelectronics
Description	White LED Charge Pump Current Source
Published	May 20, 2016
Detailed Description	SGM3122 White LED Charge Pump Current Source with PWM Brightness Control GENERAL DESCRIPTION The SGM3122 is a charge pu...
Datasheet	SGM3122 PDF File

Overview

SGM3122 White LED Charge Pump Current Source with PWM Brightness Control GENERAL DESCRIPTION The SGM3122 is a charge pump with PWM brightness control for white LED supplies in LCD display backlight applications.
The supply voltage ranges from 2.
7V to 5.
5V, it is ideally suited for all applications powered by a single Li-ion battery cell or three to four NiCd, NiMH, or alkaline battery cells.
The device provides a constant current for each LED, and the initial current value can be set by an external resistor.
High efficiency is achieved by utilizing a 1×/1.
5× fractional conversion technique in combination with very low dropout current sources.
The SGM3122 is capable of driving up to four cha...

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