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ISL976787 - 4-Channel LED Driver

Description

I PWM Brightness Control Input pin.

STV I Start Vertical Frame signal; used in VSYNC mode.

Features

  • 4x160mA, 75V rated channels with integrated channel regulation FETs.
  • Channels can be ganged for high current - 2x350mA - 1x700mA.
  • 9V~32V input voltage.
  • Dimming modes: - Direct PWM dimming from 100Hz~30kHz - PWM dimming with adjustable output frequency - 10-bit dimming resolution - VSYNC function to synchronize PWM signal to frame rate - Phase shift - Analog to PWM dimming with 8-bit resolution.
  • 2 selectable current levels for 3D.

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Full PDF Text Transcription

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4-Channel LED Driver with Phase Shift Control and 10-Bit Dimming Resolution ISL97687 The ISL97687 is a PWM controlled LED driver that supports 4 channels of LED current, for Monitor and TV LCD backlight applications. It is capable of driving 160mA per channel from a 9V to 32V input supply, with current sources rated up to 75V absolute maximum. The ISL97687’s current sources achieve typical current matching to ±1%, while dynamically maintaining the minimum required VOUT necessary for regulation. This adaptive scheme compensates for the non-uniformity of forward voltage variance in the LED strings. The ISL97687 can decode both an incoming PWM signal and an analog input voltage, for DC-to-PWM dimming applications.
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