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UBA2071A - Half bridge controller

Download the UBA2071A datasheet PDF. This datasheet also covers the UBA2071 variant, as both devices belong to the same half bridge controller family and are provided as variant models within a single manufacturer datasheet.

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.

Key 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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UBA2071_NXPSemiconductors.pdf) that lists specifications for multiple related part numbers.

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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.

View original datasheet text
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.