UCC28730 - Texas Instruments

UCC28730 PSR Flyback Controller

The UCC28730 isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler, and wake-up signal detection to improve transient response to large load steps. A minimum switching frequency of 30 Hz facilitates achieving less than 5 mW of no-load power. This device proces.

Features

•1 Enables Zero-Power (<5 mW) standby consumption
• Smart Wake-Up detection enables smallest output capacitance
• Primary-side regulation (PSR) eliminates optocoupler
• ±5% voltage regulation and current regulation across line and load
• 700-V start-up switch
• 83-kHz maximum switching frequency enables low stand-by power charger designs
• Resonant-ring valley-switching operation for highest overall efficiency
• Frequency-dither to ease EMI compliance
• Clamped gate-drive output for MOSFET
• Overvoltage, low-line, and overcurrent protection functions
• Programmable cable compensation
• SOIC-7 .