QA01C Series DC/DC Converter Targets SiC Drivers

Mornsun released the QA01C series designed for use as a DC/DC

converter power supply module for SiC mosfet driver. It operates with a

nominal 15VDC input (13.5 to 16.5 VDC) and produces outputs of

+20VDC and -4VDC, both with 100mA of output current. With its

features of low on-resistance and low leakage current, it meets the

requirements of SiC mosfet drivers. The mode of mutual connection after

two independent outputs is adopted internally for better energy provision

of device turn-on and turn-off. General applications are expected to

include switching power converters, ac servo drives, welding equipment,

industrial power conversion and uninterruptible power supplies.

Features:

Efficiency up to 83%;

SIP package;

Isolation: 3500VAC;

Capacitive load: 220uF;

Isolation capacitance: 3.5pF;

Operation temperature: -40~105°C;

Continuous short-circuit protection.

Application:

MORNSUN 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.