UBA2071 Datasheet PDF | NXP Semiconductors

NXP Semiconductors UBA2071

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.

Part No.	UBA2071
Datasheet	UBA2071 Download
Manufacturer	NXP Semiconductors
Description	Half bridge controller
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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 failure detection. Hard switching control. Arcing detection. Open/short pin protections on feedback pins. Integrated, programmable fault timer. datasheet pdf - NXP Semiconductors UBA2071; UBA2071A Half bridge control IC for CCFL backlighting I Bidirectional pin acting both as fault signaling output and input, allowing external fault interfacing to operate via the integrated fault timer. I Brightness level adjustment through PWM dimming. I Integrated PWM generator. I Power-down mode. I Communication pin for master / slave operation.