HV310LG-G Ver la hoja de datos (PDF) - Supertex Inc

Número de pieza

componentes Descripción

Fabricante

HV310LG-G

Hotswap, Inrush Current Limiter Controllers (Negative Supply Rail)

Supertex Inc 

HV310

Timing Diagram

contact

bounce

GND

VIN

VOUT

-48V

VUVL

VOUT

VIN

VRAMP

VGATE

V EE

IIN

tSTART

VRAMP

V

VGATE

GS(th)

VGS(lim)

tTH

tPOR

ILIM

V GATE

ILIM =

VSENSE

RSENSE

tSTART = 12V

CRAMP

IRAMP

tTH

=

VGS(th)

CRAMP

IRAMP

tPOR = tSTART + tTH

tRISE ≈

gfs

CRAMP

IRAMP - RSENSE

0.9ILIM

RFB

active

PWRGD

inactive

tRISE

Initialization

PtWRGD

tLIM

Limiting

Full On

tLIM ≈ VIN

CLOAD

ILIM

-

1

2

tRISE

tPWRGD

=

(VINT

-

VGS(LIM)

-

1.2V)

CRAMP

IRAMP

Note:

1. VINT is the internally regulated supply voltage and can range from 9.0 to 11V.

2. VGS(th) is the gate threshold voltage of the external pass transistor and may be obtained from its datasheet.

3. VGS(lim) is the pass transistor gate-source voltage required to obtain the limit curent. It is dependent on the pass transistor’s characteristics and may

be obtained from the transfer characteristics curves on the transistor datasheet.

4. gfs is the transconductance of the pass transistor and may be obtained from its datasheet.

5. RFB is the internal feedback resistor and is 5.0kΩ nominal.

Functional Block Diagram

VDD

UV

Internal

Supply

Regulator

Band Gap

Reference

VINT

VREF

UVLO

and

POR

C

PWRGD

VREF

LOGIC

C

OV

VINT

2VREF

Automatic

Restart

Delay

10mA

C

VINT - 1.2V

-

Transconductor

+

Circuit

Breaker

C

100mV

A

Switch

Buffer

VEE

5kΩ

SENSE

RAMP

GATE

● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com

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