HV101DB1 データシートの表示（PDF） - Supertex Inc

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HV101DB1

3-Pin Hotswap Controller

Supertex Inc 

VPP IN

VNN IN

HV101 Demo Board Schematic

VPP OUT

HV101 Demo Board

OUT+

VPP

HV101

VNN

GATE

C3

100µF

C2

not used

GATE

C1

not used

R2

not used

current

probe

R1

Q1

0Ω

IRFR120N

DRAIN

OUT-

A very high dV/dt on the input can overload the HV101’s internal

gate clamp, causing turn-on transients. A capacitor in the C

2

position may be used to clamp the gate, preventing the tran-

sients. A 1nF value is usually adequate. Voltage rating should be

16 volts.

To limit short-at-turn-on current, zero-ohm resistor R1 may be

replaced with a low value resistor. This resistor causes a voltage

drop that tends to cancel-out the applied gate voltage, thus

limiting drain current.

To reduce peak inrush current, a capacitor from gate to drain (C1)

may be employed. A resistor (R ) is also needed in this configu-

2

ration for loop stability. Please refer to the HV101 data sheet for

further information.

Note: When making positive-ground measurements, scope

probe loading on the GATE pin may interfere with normal

operation. To observe gate voltages, use negative-ground mea-

surements.

©2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited.

2

01/21/02

1235 Bordeaux Drive, Sunnyvale, CA 94089

TEL: (408) 744-0100 • FAX: (408) 222-4895

www.supertex.com

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