UCC28720
Features
- 1 < 10-m W No-Load Power
- Primary-Side Regulation (PSR) Eliminates Opto-
Coupler
- ±5% Voltage and Current Regulation Across Line and Load
- 700-V Start-Up Switch
- 80-k Hz 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
- Dynamic BJT Drive
- Overvoltage, Low-Line, and Overcurrent
Protection Functions
- Programmable Cable pensation
- SOIC-7 Package
2 Applications
- USB-pliant Adapters and Chargers for Consumer Electronics
- Smart phones
- Tablet puters
- Cameras
- Standby Supply for TV and Desktop
- White Goods
3 Description
The UCC28720 flyback power supply controller 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...
