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HVLED001B Scheda tecnica(PDF) 29 Page - STMicroelectronics

Il numero della parte HVLED001B
Spiegazioni elettronici  High power factor flyback controller with constant voltage primary-sensing and ultra-low standby consumption
PDF  33 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

HVLED001B Scheda tecnica(HTML) 29 Page - STMicroelectronics

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HVLED001B
Application information
33
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.



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