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 

General Description, cont’d.

inactive state. Thereafter a programmable auto-retry timer will

hold the device off to allow the pass element to cool before

resetting and restarting. The auto-retry can be disabled using a

single resistor if desired.

The HV301/HV311 includes a current mode servo-circuit which

can be used as a return to limit during input voltage steps such

as would be seen in a diode “ORed” situation when power

switches back to regulated supply from battery operation. The

HV301/HV311 allow independent programming of the trigger

level of this phenomenon so that it may be set at a different level

to the current limit level if desired. Under all circumstances the

maximum servo period is limited to 100ms to protect the pass

element.

PWRGD Logic

Model

HV301

HV311

Condition

INACTIVE (Not Ready)

ACTIVE (Ready)

INACTIVE (Not Ready)

ACTIVE (Ready)

PWRGD

0

VEE

1

HI Z

1

HI Z

0

VEE

Absolute Maximum Ratings

VEE reference to VDD pin

VPWRGD referenced to VEE Voltage

VUV and VOV referenced to VEE Voltage

Operating Ambient Temperature

Operating Junction Temperature

Storage Temperature Range

+0.3V to -100V

-0.3V to +100V

-0.3V to +12V

-40°C to +85°C

-40°C to +125°C

-65°C to +150°C

Waveforms

Drain

50V/div

VIN

50V/div

Gate

5.00V/div

Iinrush

500mA/div

5.00ms/div

Ordering Information

Active State of Package Options

Power Good Signal

8 Pin SO

HIGH

HV301LG

LOW

HV311LG

Pinout

HV301/HV311

PWRGD (HV301)

PWRGD (HV311) 1

OV 2

UV 3

VEE 4

8 VDD

7 RAMP

6 GATE

5 SENSE

Pin Description

PWRGD – The Power Good Output Pin is held inactive on initial

power application and will go active when the external MOSFET

is fully turned on. This pin may be used as an enable control

when connected directly to a PWM power module.

OV – This OverVoltage (OV) sense pin, when raised above its

high threshold will immediately cause the GATE pin to be pulled

low. The GATE pin will remain low until the voltage on this pin falls

below the low threshold limit, initiating a new start-up cycle.

UV – This UnderVoltage (UV) sense pin, when below its low

threshold limit will immediately cause the GATE pin to be pulled

low. The GATE pin will remain low until the voltage on this pin

rises above the high threshold limit, initiating a new start-up

cycle.

VEE – This pin is the negative terminal of the power supply input

to the circuit.

VDD – This pin is the positive terminal of the power supply input

to the circuit.

RAMP – This pin provides a current output so that a timing ramp

voltage is generated when a capacitor is connected.

GATE – This is the Gate Driver Output for the external N-

Channel MOSFET.

SENSE – The current sense resistor connected from this pin to

VEE Pin programs the circuit breaker trip limit.

3

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