DC/DC Converter for IGBT Driver

QAxx1 Series

2015.09.14-A/0

Page 3 of 4

MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation

Fig. 2

Fig. 3

Note:Take QA121 as an example, other models can be corresponding reference

Design Reference

1. Typical application

Control Signal

IGBT

Drive r

7

6

1

2

5

Vin

C1

C2

C3

DC/DC

IGBT

Rg

Vin

GND

+Vo

0V

-Vo

Fig. 4

Note: On both ends of capacitance C2 and C3 shunt respectively a

capacitance value in 1uF -10uF ceramic capacitors.

C1/ C2 /C3

100uF/35V (Low internal resistance capacitance)

2. It is not allowed to connect modules output in parallel to enlarge the power

3.For more information please find DC-DC converter application notes on www.mornsun-power.com