Digital PFC + half-bridge/LLC combo ICs

XDP™ digital multi-mode PFC and half-bridge/LLC combo controllers

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Overview

High-performance XDP™ digital combo controllers have integrated drivers and 600 V depletion cell. They are designed for boost power factor correction (PFC) and half-bridge/inductor-inductor-capacitor (LLC) targeting SMPS from 75 W to 300 W. The advanced control algorithm of XDP™ controllers provides boost PFC with multi-mode operation, including Critical Conduction mode (CrCM), quasi-resonant discontinuous mode (QR DCM), and active burst mode.

Key Features

  • Multi-mode PFC
  • Configurable PFC gate driver
  • Syn. PFC and LLC burst mode control
  • Configurable soft-start
  • VAC input voltage sensing
  • X cap discharge via HV pin

Products

About

XDP digital multi-mode PFC and half-bridge/LLC combo controller

The advanced control algorithm of XDP™ provides boost PFC with multi-mode operation, including critical conduction mode (CrCM), quasi-resonant discontinuous mode (QR DCM), and active burst mode. Additionally, the seamless communication between PFC and half-bridge/LLC ensures optimal system operation and consequently greatly improves system reliability.

Resonant converters in half-bridge configuration

Resonant-mode power supplies are a variation of SMPS circuits offering advantages such as high efficiency, low EMI, and high power density. By applying zero-current switching (ZCS) and zero-voltage switching (ZVS) schemes, switching losses are reduced significantly. Consequently, these resonant converters are also known as “soft-switching” controllers. Non-resonant mode SMPS circuits rely on hard-switching techniques. Infineon offers two types of resonant-mode controller ICs: Hybrid flyback (commonly known as “asymmetric half-bridge flyback topology”), and inductor-inductor-capacitor (LLC) controllers.

Hybrid flyback
LLC controllers
Advanced XDP™ digital power devices ensure optimal performance

Hybrid flyback controllers combine the simplicity of a flyback controller with the performance of resonant mode. By utilizing two high-voltage MOSFETs such as CoolMOS™ power MOSFETs, hybrid flyback controllers are able to drive both high- and low-side MOSFET in an asymmetric half-bridge flyback topology. To reduce switching losses, ZVS and ZCS are achieved through means of regulating both positive and negative magnetizing currents. In addition, transformer leakage energy is recycled, which further reduces switching losses.

XDP digital multi-mode PFC and half-bridge/LLC combo controller

The advanced control algorithm of XDP™ provides boost PFC with multi-mode operation, including critical conduction mode (CrCM), quasi-resonant discontinuous mode (QR DCM), and active burst mode. Additionally, the seamless communication between PFC and half-bridge/LLC ensures optimal system operation and consequently greatly improves system reliability.

Resonant converters in half-bridge configuration

Resonant-mode power supplies are a variation of SMPS circuits offering advantages such as high efficiency, low EMI, and high power density. By applying zero-current switching (ZCS) and zero-voltage switching (ZVS) schemes, switching losses are reduced significantly. Consequently, these resonant converters are also known as “soft-switching” controllers. Non-resonant mode SMPS circuits rely on hard-switching techniques. Infineon offers two types of resonant-mode controller ICs: Hybrid flyback (commonly known as “asymmetric half-bridge flyback topology”), and inductor-inductor-capacitor (LLC) controllers.

Hybrid flyback
LLC controllers

Advanced XDP™ digital power devices ensure optimal performance

Hybrid flyback controllers combine the simplicity of a flyback controller with the performance of resonant mode. By utilizing two high-voltage MOSFETs such as CoolMOS™ power MOSFETs, hybrid flyback controllers are able to drive both high- and low-side MOSFET in an asymmetric half-bridge flyback topology. To reduce switching losses, ZVS and ZCS are achieved through means of regulating both positive and negative magnetizing currents. In addition, transformer leakage energy is recycled, which further reduces switching losses.

Documents

Documents

Design resources

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