5-V/2-A: 12-V/2.5-A Dual-output flyback reference design with <50-mW standby power
Description
This reference design is a dual-output flyback converter using secondary-side regulation based on the UCC28742. A 5-V rail is regulated within ±1% precision and a cross regulation of a 12-V rail is within -8% to +14% at 25% to 100% load. The design utilizes a single-layer PCB for cost optimization. The peak efficiency is 82.82% at 115 V/50 Hz and 83.19% at 230 V/50 Hz. Power consumption at standby mode is 31.6 mW at 115 V/50 Hz and 54.2 mW at 230 V/50 Hz.
Features
- Optocoupler feedback delivers fast transient response and tight voltage regulationDCM operation with valley switching for improved efficiency and reduced EMIUltra-low startup current and large VDD hysteresis for low bias capacitanceFault protections: including input low line: output overvoltage: overcurrent: and short-circuit protection
Applications
- Oven
- Air conditioner outdoor unit
- Cooker hood
- Air conditioner indoor unit
Product Categories
- Power management