Microchip MCP14E4 | Demoboard 750W-AC-DC

Description

Microchip’s 750W AC-DC Reference Design demonstrates a semi-bridgeless PFC topology followed by a peak current controlled zero-voltage switching full-bridge (ZVS FB) converter with digital slope compensation to achieve very high conversion efficiencies. This power supply can be firmware updated (including the compensator algorithm) with zero down time to the system it is powering while the power supply is running. It is implemented using two dsPIC33EP “GS” digital-power DSCs that provide full digital control of the power conversion as well as all system management functions.The ZVS FB Converter is designed to stepdown an input DC voltage of 400V to an output DC voltage of 12V. A unique feature of the reference design is the implementation of peak current control, using a fully software-based slope compensation algorithm, which eliminates the use of external analog components for slope compensation. The 750W AC/DC Reference Design is royalty free when used in accordance with the licensing agreement.

Features

• High Peak Output Current: 4.0A (typical)
• Independent Enable Function for Each Driver Output
• Low Shoot-Through/Cross-Conduction Current in Output Stage
• Wide Input Supply Voltage Operating Range:
• 4.5V to 18V
• High Capacitive Load Drive Capability:
• 2200 pF in 15 ns (typical)
• 5600 pF in 26 ns (typical)
• Short Delay Times: 50 ns (typical)
• Latch-Up Protected: Will Withstand 1.5A Reverse Current
• Logic Input Will Withstand Negative Swing Up To 5V
• Space-Saving Packages:
• 8-Lead 6x5 DFN, PDIP, SOIC

Typical applications

• General application AC/DC

More information

• Datasheet
• IC product information