IS32LT3958A Datasheet PDF - Lumissil HIGH VOLTAGE LED LIGHTING CONTROLLER Specs

IS32LT3958A - HIGH VOLTAGE LED LIGHTING CONTROLLER

Datasheet Summary

Description

The IS32LT3958A is a current mode PWM controller designed to drive a low side external NMOS FET for wide input/output voltage range and high LED current applications.

An external resistor senses the high side output current of the LED string.

Features

two independent analog dimming pins, ICTRL and ADJR. Input DC voltage in the range of 0.06V~2V on the ICTRL pin and/or ADJR pin is required for analog dimming. PWM dimming is achieved by directly modulating the PWM/EN pin with desired PWM duty cycle or by enabling the internal PWM generator circuit. With the internal PWM generator circuit, IS32LT3958A can achieve standalone dual brightness level output. The duty cycle and frequency of the internal PWM generator is easily programmed by external r.

Datasheet Details

Part number	IS32LT3958A
Manufacturer	Lumissil
File Size	679.93 KB
Description	HIGH VOLTAGE LED LIGHTING CONTROLLER
Datasheet	IS32LT3958A Datasheet
Additional preview pages of the IS32LT3958A datasheet.

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Full PDF Text Transcription

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IS32LT3958A HIGH VOLTAGE LED LIGHTING CONTROLLER WITH INTERNAL PWM GENERATOR AND FAULT PROTECTION May 2024 GENERAL DESCRIPTION The IS32LT3958A is a current mode PWM controller designed to drive a low side external NMOS FET for wide input/output voltage range and high LED current applications. An external resistor senses the high side output current of the LED string. A high side sense resistor is the most flexible current sensing scheme, since it functions in either boost or buck-boost mode configurations. The controller can be configured with an external resistor to operate between 100kHz~1MHz frequency resulting in small external inductor and capacitors while maintaining high efficiency.

Published: Jul 16, 2024 |