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IS31LT3918 - HIGH VOLTAGE LED LIGHTING DRIVER

General Description

IS31LT3918 LED driver IC is a peak current detection buck converter which operates in constant off time mode.

It operates over a very wide input voltage supply range of 6VDC to 450VDC or 110VAC/220VAC.

Key Features

  • User configurable switch dimming levels 3% output current accuracy Over current, voltage and temperature protection High efficiency (typical up to 95%) Wide input voltage range: 6VDC~450VDC or 85Vac~ 265Vac Linear and PWM dimming Very few external components.

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Other Datasheets by ISSI (now Infineon)

Part Number Description
IS31LT3910 UNIVERSAL HIGH BRIGHTNESS LED DRIVER
IS31LT3916 Offline LED driver
IS31LT3929 Flyback configuration LED driver
IS31LT3932 High PF universal LED Driver
IS31LT3935 TRIAC Dimmable AC/DC LED Driver

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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IS31LT3918 HIGH VOLTAGE LED LIGHTING DRIVER WITH SWITCH DIMMING OCTOBER 2011 GENERAL DESCRIPTION IS31LT3918 LED driver IC is a peak current detection buck converter which operates in constant off time mode. It operates over a very wide input voltage supply range of 6VDC to 450VDC or 110VAC/220VAC. IS31LT3918 incorporates the special feature of switch dimming by detecting OFF-ON cycles of the main power switch. When the switch is cycled within a 2 second period (typical) the device automatically switches the dimming level to the next step. As a result, dimming can be achieved without replacing any wiring in the original system.