DocID027333 Rev 1

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HVLED001

Application information

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7.7

Disable and monitor feature

Several disabling means are available to externally disable the IC:

1.

Driving FB pin low (FB_DIS): this occurrence immediately stops the switching activity

until the FB voltage returns above the threshold.

2.

Driving CTRL pin low (CTRL_DIS): this occurrence immediately puts the device in

the low consumption mode; when the CTLR pin is left free, the internal biasing mean

pulls-up the voltage above the threshold entering the soft-start procedure.

3.

Driving CTRL pin high (AN_DIS): a CTRL voltage higher than the threshold for a time

longer than Tdis causes the device to enter the low consumption mode. The ART timer

performs an auto-recover procedure after Trec.

Anytime the HVLED001 device enters low consumption, an internal pull-down discharges

the soft-start capacitor and resets the soft-start time.