Description
●The UCC28722 flyback power supply controller provides isolated-output constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler. The device processes
●information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.
●Features
●• < 50-mW No-Load Power
●• Primary-Side Regulation (PSR) Eliminates OptoCoupler
●• Dynamic BJT Drive
●• ± 5% Voltage and Current Regulation Across Line and Load
●• 80-kHz Maximum Switching Frequency Enables High-Power Density Charger Designs
●• Quasi-Resonant Valley-Switching Operation for Highest Overall Efficiency
●• Wide VDD Range Allows Small Bias Capacitor
●• Output Overvoltage, Low-Line, and Overcurrent Protection Functions
●• Programmable Cable Compensation
●• SOT23-6 Package
●Applications
●• USB-Compliant Adapters and Chargers for Consumer Electronics
●– Smart Phones
●– Tablet Computers
●– Cameras
●• Standby Supply for TVs and Desktops
●• White Goods
