DS12748 Rev 2

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HVLED001B

Application information

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7.6.5

Output over voltage protection (oOVP)

In the case of ZCD sampled voltage being well above the VREF,PSR voltage (around 3 V),

OTA provides an extra sink current (2 mA typ.) to the FB pin to speed up the energy transfer

reduction and limiting the output voltage overshooting.

7.7

Disable and monitor feature

The OPTO pin can also be used as disabling mean to externally disable the IC: when pulled

to ground the device enters low consumption mode, while, when the OPTO pin is left free,

the internal biasing mean pulls up the voltage above the threshold entering the ramp-up

mode procedure.