HV100(2013) 데이터 시트보기 (PDF) - Supertex Inc

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HV100
(Rev.:2013)

3-Pin Hotswap, Inrush Current Limiter Controllers (Negative Supply Rail)

Supertex Inc 

Implementing PWRGD Control

Due to the HV100’s small footprint, it is possible to create an

open drain PWRGD signal using external components and

still maintain a size comparable with the smallest hotswap

controllers available elsewhere. To accomplish this an ex-

ternal MOSFET may be used in conjunction with the GATE

output. Simply use a high impedance divider (10MΩ) sized

so that the open drain PWRGD MOSFET threshold will only

be reached once the HV100’s GATE voltage rises well above

the current limit value required by the external MOSFET pass

device. Alternatively a Zener diode between the GATE output

and the PWRGD MOSFET GATE set at a voltage higher than

the maximum pass element Vt will also work.

Functional Block Diagram

VPP

Regulator

UVLO

UV

POR

Timer

Restart

Timer

Reference

Generator

Logic

HV100

HV100

PWGRD

GATE

VNN

Doc.# DSFP-HV100

B060513

Supertex inc.

7

www.supertex.com

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