HV311 查看數據表（PDF） - Supertex Inc

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HV311

Hot Swap Controller (Negative Supply Rail)

Supertex Inc 

GND

R1

475kΩ

R2

16.2kΩ

-48V

8

VDD

PWRGD / PWRGD 1

3 UV

R3

511kΩ

2 OV

R4

10kΩ

HV301/

HV311

RAMP VEE SENSE GATE

7

4

5

6

R6

C1

10nF

ENABLE / ENABLE +5V

Cload

DC/DC

PWM

COM

CONVERTER

R5

12.5mΩ

Q1

IRF530

HV301/HV311

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

oscillations around are observed when VIN is close to OVLO.

Application Circuit 11

Reverse Polarity Protection

The UV and OV pins are protected against reverse polarity input

supplies by internal clamping diodes and the fault currents are

sufficiently limited by the impedance of the external resistor

divider, however, a low current diode with a 100V breakdown

rating must be inserted in series with the VDD pin.

This method (shown in Application Circuit 12) will protect the

hot swap control circuit however, due to the intrinsic diode in the

external MOSFET, the load will not be protected from reverse

polarity voltages.

GND

R1

487kΩ

R2

6.81kΩ

R3

9.76kΩ

-48V

D1

8

VDD

3 UV

2 OV

PWRGD / PWRGD 1

HV311

ENABLE / ENABLE +5V

Cload

DC/DC

PWM

COM

CONVERTER

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 gate

oscillations around are observed when VIN is close to OVLO.

Application Circuit 12

A092605

15

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