Background

Nowadays, SiC mosfet has replaced IGBT gradually in high voltage and high frequency situations because of its low on-resistance and low leakage current. At the same time, the SiC mosfet driver also has a fast development. So MORNSUN released QA01C series power module to meet the requirements of SiC mosfet driver.  

QA01C Series Introduction

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QA01C is a special dual isolation DC/DC Converter for SiC mosfet driver. It adopts the mode of mutual connection after two independent outputs makes it better power up SiC mosfet's turn-on and turn-off. Meanwhile, it has output short-circuit protection, which can widely use in frequency transformer / AC servo drive system / welding equipment / UPS.  

Features:

• Isolation: 3500VAC;
• Capacitive load: 220uF;
• Isolation capacitance: 3.5pF;
• Operation temperature: -40~105 °C;
• Efficiency up to: 83%;
• SIP package;
• Continuous short-circuit protection;  

Application

SiC mosfet driver can receive asymmetric positive driving voltage of 20V and turn off voltage bias -4V from QA01C. In order to prevent the damage to the grid electrode, adding D2(zener diode) & D3(zener diode) is necessary to absorb the peak voltage. In addition, we recommend opto-coupler isolation to achieve the signal isolation between control circuit and main power circuit, but the opto-coupler must has high CMRR(30KV/us) /high isolation voltage/ultra-short delay time to meet the characteristic high frequency of SiC mosfet.

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Mornsun Guangzhou Science & Technology Co. Ltd.
No.5, Kehui Development Center, Science Ave., Guangzhou Science City, Luogang District, Guangzhou
Tel: +86(20)38601850   Fax: +86(20)38601272
Email: market400@mornsun.cn   Website: http://www.mornsun-power.com