HV301 Ver la hoja de datos (PDF) - Supertex Inc

Número de pieza

componentes Descripción

Fabricante

HV301

35-65V hotswap, controller with circuit breaker

Supertex Inc 

PWRGD Output

It is critical to have a detailed understanding of the ENABLE input

circuitry of the load (DC/DC PWM Converter) in order to make

the correct choice between the HV301 or HV311.

Many DC/DC PWM Converters reference their ENABLE inputs

to the negative input terminal. If the ENABLE input is active LOW

HV301/HV311

then the HV311 can be directly connected as shown below

(Application Circuit 1) since the open drain PWRGD output is

in a High-Z state until the external MOSFET is fully turned on and

the potential on the negative input of the converter is essentially

the same as the VEE pin of the HV311.

GND

R1

487kΩ

R2

6.81kΩ

R3

9.76kΩ

-48V

8

VDD

PWRGD

1

3 UV

2 OV

HV311

+

Cload

-

RAMP VEE

7

4

SENSE GATE

5

6

C1

10nF

R4

12.5mΩ

Q1

IRF530

Note: capacitor may be needed to slow PWRGD dv/dt if

oscillations are observed when VIN is close to OV.

ENABLE

+5V

DC/DC

PWM

CONVERTER

COM

Application Circuit 1

10

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