UCC28712 - Texas Instruments

UCC28712 Constant-Current Controller

The UCC2871x family of flyback power supply controllers provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. VAC VAUX – UCC28710 VDD H.

Features

•1 < 10-mW No-Load Power
• Primary-Side Regulation (PSR) Eliminates Opto- Coupler
• ±5% Voltage and Current Regulation Across Line and Load
• 700-V Start-Up Switch
• 100-kHz Maximum Switching Frequency Enables High-Power Density Charger Designs
• Resonant Valley-Switching Operation for Highest Overall Efficiency
• Frequency Jitter to Ease EMI Compliance
• Wide VDD Range Allows Small Bias Capacitor
• Clamped Gate-Drive Output for MOSFET
• Overvoltage, Low-Line, and Overcurrent Protection Functions
• Programmable Cable Compensation (UCC28710)
• NTC Resistor Interface (UCC28711, UCC28712 and UCC2.