HF01B00 View Datasheet(PDF) - MPS Industries, Inc.

Part Name

Description

Manufacturer

HF01B00

Off Line High Voltage Quasi Resonant Regulator

MPS Industries, Inc. 

HF01B00/01/02/03/04–OFF LINE HIGH VOLTAGE QUASI RESONANT REGULATOR

PIN FUNCTIONS

Pin #

1

2

3

4

5

6

7

8

Name

VSD

VCC

N/C

D

S

S

GND

FB

Description

Valley switching detector of the auxiliary flyback signal. It ensures Discontinuous Conduction

Mode (DCM) operation with valley switching over the entire input/load range. This pin also

offers OVP detection.

Supply voltage pin. Typically connect a 22μF bulk capacitor and a 0.1uF ceramic capacitor

to this Pin. When VCC is charged to 12V, the internal high voltage current source turns off

and the IC starts switching; when it falls back to 8V, the high voltage current source turns on

again and the IC stops switching.

Not connected. This pin ensures adequate creepage distance.

Drain of the internal MOSFET. Input for the start up high voltage current source.

Source of the internal MOSFET. Input of the primary current sense signal.

Source of the internal MOSFET. Input of the primary current sense signal.

The IC Ground.

This pin sets the primary peak current limit, by directly connecting an optocoupler to this pin

to close the feedback loop. A feedback voltage of 3.7V on this pin will trigger an Over Load

Protection while 0.5V will trigger a Burst Mode operation. The regulator leaves Burst Mode

Operation and enters normal operation when the FB voltage reaches 0.7V

HF01B00/01/02/03/04 Rev. 1.2

www.MonolithicPower.com

5

4/9/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

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