• DCDC

Boost Converter (Boost Diode)

Description

This is a circuit that boosts the input voltage to a higher output voltage. The main switch stores magnetizing energy in the inductor during the on period, and the diode turns on during the off period, supplying the magnetizing energy of the inductor to the output. The voltage conversion ratio M is determined by the on/off duty ratio D of the main switch and is given by the following equation.
M = 1 / (1-D), Normally, D <= 0.8, M <= 5

Overview

- Various choises of Boost Switch depend on system requirements
     - Lower cost SJ-MOSFET
     - Lower loss SiC MOSFET, IGBT
     - Smaller Package choises from 3-leads, 4-leads or 7-leads,
- Boost diode can be choosed from
     - Si Fast Recovery Diode
     - SiC Shott Key Diode

Circuit

Circuit

Key Products

Product Category Product Family Product Number Feature
Boost Switch 650V IGBT RGWxxTx65 series Trench-gate and thin-wafer technologies are utilized to achieve low VCE(sat) reducing switching loss.
600V SJ MOSFET R60 serires 600 to 800V power MOSFETs using superjunction technlogy, PrestoMOSTM series enable high speed switching and low on-resistance performance. Variaous choice of package are availble.
750V SiC MOSFET SCT4xxxDx series NEW The latest SiC MOSFET device. Enhanced low on-resistance enable best in class performance. It supports 750 V withstand voltage, ensuring a higher operating margin than conventional products, and can be used safely.
650V SiC MOSFET SCT3xxxAx series Trench-gate SiC MOSFET with low on-resistance (50% reduction) compared to conventional products.
Boost Diode 650V SiC SBD SCS3xxAx series High IFSM in spite of low VF, low leakage current provides safety design.
650V Si FRD RFUH series Small trr enable fast switching capability, RFUH series compatible to automotive use case.
Gate Driver Galvanic Isolated gate driver BM61x4xRFV 1ch configuration, 3,750Vrms isolated type Gate Driver, can be used for switching devices with current source pins.

Simulation

C-002 : Boost Converter (Boost Diode)

Related Topologies

- LLC Converter (Hlaf bridge, diode bridge)

- Bipolar Boost converter

- 3-Level flying capacitor booster