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UBA3077HN - Three-channel switched-mode LED driver

Datasheet Summary

Description

The UBA3077HN is a high efficiency LED driver in an HVQFN40 package for general LED lighting or backlighting LCD displays.

Operating from a supply of 10 V to 42 V, it can drive up to 3 strings of 20 LEDs each.

The low voltage circuitry is powered by an external 5 V voltage supply.

Features

  • Three-channel LED backlight driver.
  • ±2 % absolute LED current accuracy and channel-to-channel matching.
  • External power supply voltage from 10 V to 42 V and 5 V for low voltage circuitry.
  • Constant 500 kHz frequency peak current mode control.
  • Low value output capacitor (2 μF).
  • Up to 150 mA per channel.
  • Peak LED current programmable with external resistor.
  • Three boost converters from VIN up to 75 V output voltage.
  • Hig.

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Datasheet preview – UBA3077HN

Datasheet Details

Part number UBA3077HN
Manufacturer NXP Semiconductors
File Size 239.33 KB
Description Three-channel switched-mode LED driver
Datasheet download datasheet UBA3077HN Datasheet
Additional preview pages of the UBA3077HN datasheet.

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Full PDF Text Transcription

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UBA3077HN Three-channel switched-mode LED driver Rev. 1 — 8 February 2011 Objective data sheet 1. General description The UBA3077HN is a high efficiency LED driver in an HVQFN40 package for general LED lighting or backlighting LCD displays. Operating from a supply of 10 V to 42 V, it can drive up to 3 strings of 20 LEDs each. The low voltage circuitry is powered by an external 5 V voltage supply. The chip can operate autonomously or be controlled via a 400 kHz I2C-bus. The peak current in each string is fixed by an external resistor. Three independent Pulse-Width Modulated (PWM) signals are available for dimming purposes.
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