HFC0100—QUASI RESONANT CONTROLLER
PIN FUNCTIONS
Pin #
1
2
3
4
5
6
7
8
Name
VSD
Vcc
N/C
HV
Drive
CS
GND
FB
Description
Input from the auxiliary flyback signal, it ensures discontinuous operation and valley
switching. It also offers a fixed OVP detection.
Supply voltage Pin. This pin is connected to an external bulk capacitor of typically 22uf and a
ceramic capacitor of typically 0.1uF.
This Pin ensures adequate creepage distance.
Input for the start up current unit.
Output of the driving signal.
Input of the current sense.
Ground.
The Pin sets the peak current limit, by connecting an optocoupler to this Pin. A feedback
voltage of 3.7V will trigger an over load protection, and a feedback voltage of 0.5V will trigger
a burst mode operation.
HFC0100 Rev. 1.03
www.MonolithicPower.com
11/28/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
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