Uba2071at Control Backlight Lcd Sop24 Itytarg

Type CCFL/EEFL Controller
Frequency 38kHz ~ 42kHz
Voltage - Supply 14V
Current - Supply 1.5mA
Current - Output Source/Sink -
Dimming Yes
Operating Temperature -25°C ~ 100°C
Mounting Type Surface Mount

Product Summary

The UBA2071AT is a Half bridge control IC for CCFL backlighting. The UBA2071AT is a high voltage IC 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 UBA2071AT is designed to be supplied by a fixed 12 V supply. It has a lower supply start voltage and no supply clamp. The applications of the UBA2071AT include LCD-backlighting, including LCD-TV and LCD-monitor applications.

The IC is intended to drive and control a half bridge inverter with resonant load circuit for CCFLs, but can also drive an array of External Electrode Fluorescent Lamps (EEFLs).

Parametrics
UBA2071AT absolute maximum ratings: (1)Rref(IREF) reference resistance on pin IREF: 30 to 36Ω; (2)SR slew rate on pins FS, GH, and SH: -4 to +4 V/ns; (3)Tamb ambient temperature: -25 to +100℃; (4)Tj junction temperature: -25 to +125℃; (5)Tstg storage temperature: -55 to +150℃; (6)VSH voltage on pin SH: 550 V; (7)VVDD voltage on pin VDD: 14 V.

Features
UBA2071AT features: (1)Suitable for operating in a very wide inverter supply voltage range (up to 550 V DC); (2)Integrated level shifter; (3)Integrated bootstrap diode; (4)Lamp current control by means of a true zero voltage switching resonant control principle; (5)Sample & Hold circuit, maintaining current control value during PWM lamp-off situation; (6)Separately definable time constants for current control loop and PWM dimming attack/decay setting; (7)Overvoltage control; (8)Overcurrent protection; (9)Ignition failure detection; (10)Hard switching control; (11)Arcing detection; (12)Open/short pin protections on feedback pins; (13)Integrated, programmable fault timer.

Datasheet