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HVLED001

Application information

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Figure 6. High power factor flyback – primary side regulated constant output voltage

The HVLED001 has four main operating modes: the start-up mode, active mode, stop mode

and low consumption mode.

7.1.1

Start-up mode

This state is entered to begin the switching activity (during application's turn on or exiting

from low consumption state). The HVSU is involved into the mechanism of VCC charging;

all other peripherals, except the UVLO and logic supply, are turned off to minimize the start-

up time.

During this state the CTLR pin is internally pulled to ground.