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IS32BL3552 - BOOST TYPE LED DRIVER

Description

The IS32BL3552 is a white LED driver for backlight applications based on a highly efficient boost controller operating over a wide input voltage range of 4.5V to 33V.

Features

  • to prevent damage during fault conditions. Protection features include an internal soft-start circuit to prevent a high inrush current during startup, open/short LED protection to automatically disable a faulty current source, over temperature protection (OTP), cycle-by-cycle current limit, under voltage lockout (UVLO), programmable OVP, VOUT short / Schottky diode open protection and Schottky Diode short-circuit protection. The IS32BL3552 is available in a thermally enhanced eTSSOP-16 package.

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Full PDF Text Transcription

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IS32BL3552 BOOST TYPE LED DRIVER WITH 2-CHANNEL CURRENT SOURCE Preliminary Information August 2014 GENERAL DESCRIPTION The IS32BL3552 is a white LED driver for backlight applications based on a highly efficient boost controller operating over a wide input voltage range of 4.5V to 33V. The IS32BL3552 contains four regulated current sources with 1.5% (Typ.) current matching between strings for a uniform LED brightness. Each current source can be programmed via an external resistor to drive from 40mA to 360mA. A fast slew rate current source allows high frequency and narrow pulse width dimming signals to achieve a very high contrast ratio. The device operating frequency can be adjusted from 0.1MHz to 1MHz.
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