HV301LG 查看數據表（PDF） - Supertex Inc

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HV301LG

Hot Swap Controller (Negative Supply Rail)

Supertex Inc 

Technical Update / Alert

HV301/HV311

This alert applies to the HV301, HV302, HV311, and HV312 Hotswap Controllers

The internal circuit breaker may trip unintentionally in situ-

ations when the voltage at the VDD pin rises slowly as power

is applied.

This unintended tripping of the circuit breaker causes the

power-on sequence to be delayed by an additional Auto-

matic Restart Delay. The extra delay can be observed by

viewing the voltage waveform at the RAMP pin.

The inadvertant tripping of the circuit breaker does not

occur when the input voltage slew rate is greater than 400V

per ms. In a typical hotswap application, the rise of the

input voltage occurs in a couple of microseconds, and the

slew rate is well in excess of of the value necessary to

cause tripping of the circuit breaker.

Subsequent to this delay, this device will perform a regu-

lar start-up, thereby providing power to the load.

If technical assistance is required, please contact our applications department by e-mail at apps@supertex.com, or by

telephone at 408-222-4895.

Doc.# DSFP - HV301/HV311

A092605

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A092605

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