HV311LG Ver la hoja de datos (PDF) - Supertex Inc

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componentes Descripción

Fabricante

HV311LG

35-65V hotswap, controller with circuit breaker

Supertex Inc 

Application Information, cont’d.

If separate resistor dividers are used for OV and UV, then only

the positive (VDD) end of the UV resistor divider should be

connected to the short pin (Application Circuit 8).

If a system requires the use of a short connector pin on the

negative supply lead to guarantee that the power pins are fully

HV301/HV311

mated before the hotswap control circuit is enabled and a single

resistor divider string (R1, R2 and R3) is used, then a 6.2V to 10V

zener diode must be connected from the UV pin to the VEE pin,

as seen below in Application Circuit 9.

Long

Pin

GND

Short

Pin

GND

R1

475K

R2

16.2K

8

VDD

PWRGD / PWRGD 1

3

UV

R3

511K

2 OV

R4

10K

HV311

ENABLE / ENABLE +5V

Cload

DC/DC

PWM

COM

CONVERTER

RAMP VEE SENSE GATE

7

4

5

6

-48V

Long

Pin

C1

10nF

R5

12.5mΩ

Q1

IRF530

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

oscillations are observed when VIN is close to OV.

Application Circuit 8

Long

Pin

GND

R1

487kΩ

R2

6.81kΩ

R3

9.76kΩ

-48V

Short

Pin

-48V

Long

Pin

8

VDD

3 UV

2 OV

PWRGD / PWRGD 1

HV311

ENABLE / ENABLE +5V

Cload

DC/DC

PWM

COM

CONVERTER

RAMP VEE

7

4

6.2V

C1

10nF

SENSE GATE

56

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.

14

Application Circuit 9

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