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SGM3758 - Boost WLED Driver

Description

With a 40V rated integrated switch FET, the SGM3758 is a boost converter that drives LEDs in series.

The boost converter has a 40V, 3A internal MOSFET; thus it can drive single or parallel LED strings for small to large size panel backlighting.

Features

  • integrated open LED protection that disables the SGM3758 to prevent the output voltage from exceeding the IC absolute maximum voltage ratings during open LED conditions. When the device is working, if the STROBE pin is pulled up, it will turn on flash mode within 100µs. And the feedback voltage is regulated to 5× of the backlight mode that determined by the PWM signal duty cycle. And it will turn to backlight mode within 100µs when the STROBE pin is pulled down or the strobe signal keeps high ov.

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Full PDF Text Transcription

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SGM3758 38V High Efficiency, Boost WLED Driver with Strobe Interface for Flash Mode GENERAL DESCRIPTION With a 40V rated integrated switch FET, the SGM3758 is a boost converter that drives LEDs in series. The boost converter has a 40V, 3A internal MOSFET; thus it can drive single or parallel LED strings for small to large size panel backlighting. And it is quite suitable for smart phone image capture using display device as a flash mode light source, as it can output up to 200mA current at 30V for 320ms when the strobe signal is active. The backlight mode default white LED current is set with the external sensor resistor, RSET, and the feedback voltage is regulated to 200mV, as shown in the typical application.
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