MP1921A―100V, 2.5A, HIGH FREQUENCY HALF-BRIDGE GATE DRIVER
Active-Clamp Forward Converter
In active-clamp forward converter topology, the
MOSFETs are driven alternately. The high-side
MOSFET, along with capacitor Creset, is used to
reset the power transformer in a lossless manner.
This topology lends itself well to run at duty
cycles exceeding 50%. For these reasons, the
input voltage may not be able to run at 100V for
this application.
Input Voltage
5
4
INH
INL
SW
DRVH
BST
INH
INL
6
7
3
2
Secondary
Circuit
VSS
Creset
8
1
DRVL
VDD
DRVL
DRVL
VDD
9V - 18V
Figure 5 – Active-Clamp Forward Converter
MP1921A Rev1.03
12/9/2014
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