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Part Number: DC/DC-LLC-Resonant-Converter
MICROCHIP’S 200W DC/DC LLC RESONANT CONVERTER REFERENCE DESIGN
**For development reference only, not a product for sale**
Low power consumption at no load
Programmable soft-start
Voltage, Current, Temperature monitoring & Protection
Primary and secondary MOSFET control
Full Digital Control
Overview
Microchip’s 200W DC/DC LLC Resonant Converter Reference Design operates over a wide input voltage range (350 - 420Vdc) with a nominal input of 400V, providing a 12V DC output, while maintaining high-voltage isolation between the primary and secondary. High efficiency is achieved through Zero Voltage Switching (ZVS) on the half-bridge converter and Zero Current Switching (ZCS) on the synchronous rectifier. A synchronous rectifier is implemented over the traditional full wave rectifier for improved efficiency. The DC/DC LLC Resonant Converter Reference Design utilizes Microchip’s digital power conversion dsPIC for unique “adaptive” control of the half-bridge converter and synchronous rectifier.
This reference design is implemented using a single dsPIC33EP / dsPIC33FJ “GS” digital-power DSCs from Microchip that provides the full digital control of the power conversion and system management functions. As shown in this reference design the efficient use of dsPIC33EP / dsPIC33FJ ‘GS’ devices enable designers to easily and cost effectively create products using advanced switching techniques such as LLC that lower switching losses and enable efficiencies as high as 95%. The DC/DC LLC Resonant Converter Reference Design is royalty free when used in accordance with the licensing agreement.
For additional details and design files please visit the reference design page.