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UBA2071A - Half bridge controller

This page provides the datasheet information for the UBA2071A, a member of the UBA2071 Half bridge controller family.

Datasheet Summary

Description

The UBA2071 and UBA2071A are high voltage ICs intended to drive Cold Cathode Fluorescent Lamps (CCFLs) or External Electrode Fluorescent Lamps (EEFLs) for backlighting applications.

Features

  • I I I I I I I I I I I I I Suitable for operating in a very wide inverter supply voltage range (up to 550 V DC). Integrated level shifter. Integrated bootstrap diode. Lamp current control by means of a true zero voltage switching resonant control principle. Sample & Hold circuit, maintaining current control value during PWM lamp-off situation. Separately definable time constants for current control loop and PWM dimming attack/decay setting. Overvoltage control. Overcurrent protection. Ignition fai.

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Datasheet preview – UBA2071A

Datasheet Details

Part number UBA2071A
Manufacturer NXP Semiconductors
File Size 680.33 KB
Description Half bridge controller
Datasheet download datasheet UBA2071A Datasheet
Additional preview pages of the UBA2071A datasheet.

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Full PDF Text Transcription

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UBA2071; UBA2071A Half bridge control IC for CCFL backlighting Rev. 01 — 23 June 2008 Product data sheet 1. General description The UBA2071 and UBA2071A are high voltage ICs intended to drive Cold Cathode Fluorescent Lamps (CCFLs) or External Electrode Fluorescent Lamps (EEFLs) for backlighting applications. They can drive a half bridge circuit made up of two NMOSFETs with a supply voltage of up to 550 V, so the inverter can be supplied directly from a 400 V PFC bus. The UBA2071 and UBA2071A contain a controller, a level shifter, a bootstrap diode and drivers for the external half bridge power switches. It also contains a low frequency PWM generator, which can be used to control the brightness level of the lamps, using an analog brightness/dimming control voltage.
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