Texas Instruments UCC28056 | Demoboard TIDA-01557

Description

This reference design is a compact, high efficiency, fast transient, universal input, 12-V DC, 200-W nominal output, AC/DC power supply (PSU) targeted for desktop PCs and gaming adapters. The TIDA-01557 circuit consists of a front-end transition-mode (TrM) power factor correction (PFC) circuit based on the UCC28056, followed by an LLC stage for isolated DC/DC conversion based on UCC256301. For high efficiency needs, synchronous rectification is done using the UCC24612-2 synchronous rectifier controller and low RDS (on) MOSFETs CSD18511. This design does not need additional auxiliary power supply for meeting no-load and light-load specifications. The design can be used as an AC/DC power supply in applications that demand efficient power conversion and fast transient response.

Features

• Peak overall efficiency of 92.5% at 230-V AC and 90.5% at 115-V AC, fan cooling needed up to 55°C ambient operation
• High power factor > 0.96 at 230-V AC from 50% to 100% load meets PFC regulations and current THD as per IEC 61000-3-2 Class D
• Very low no load power consumption of <125mW
• Light load efficiency of >50% at 0.25W; > 79% at 2W; >81% at 4W
• Single-Layer, CEM-1 material PCB design to achieve low cost; small PCB (70 x 125 x 35 mm) fits in both SFX12 and gaming adapter form-factor
• Leading transient performance with half duty cycle response for line transient and dynamic load

Typical applications

• AC Sources, DC Power Supplies & Electronic Loads / Merchant DIN Rail Power Supply

More information

• Datasheet
• IC product information