MP1907―100V, 2.5A, HIGH FREQUENCY HALF-BRIDGE GATE DRIVER
MP1907 Rev. 1.2 www.MonolithicPower.com 14
4/16/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
Active-Clamp Forward Converter
In active-clamp forward converter topology, the
MOSFETs are driven alternately. The high-side
MOSFET, along with capacitor C
reset
, 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.
EN
INH
INL
VSS
DRVL
SW
DRVH
BST
NC
VDD
DRVL
DRVL
1
2
3
4
5
10
9
8
7
6
EN
INH
INL
Up to 100V
VDD
9V to 18V
10µF
+
MP1907
Secondary
Circuit
+
Creset
Figure 4—Active-clamp Forward Converter