UCC25710 - Texas Instruments

UCC25710 LLC Half-Bridge Controller

The UCC25710 device is an LLC half-bridge controller for accurate control of multi-string LED backlight applications. It is optimized for multitransformer, multi-string LED architectures. Superior LED current matching in multiple strings can be achieved with this controller and architecture. Compared to existing LED backlight solutions, the multi-transformer.

Features

•1 Closed-Loop LED String Current Control
• PWM Dimming Input
• Adjustable FMIN (3% accuracy), and FMAX (7.5% Accuracy)
• LLC and Series LED Switch Control for Dimming
• Programmable Dimming LLC ON/OFF Ramp for Elimination of Audible Noise
• Closed-Loop Current Control at Low Dimming Duty Cycles
• Programmable Soft Start
• Accurate VREF for Tight Output Regulation
• Overvoltage, Undervoltage and Input Overcurrent Protection With Auto-Restart Response
• Second Overcurrent Threshold With Latch-Off Response
• 400-mA/-800-mA Gate Drive Current
• Low Start-Up and Operating Currents
• Lead (Pb)-Free.