Datasheet

L6563H Application information
Doc ID 16047 Rev 3 37/49
consumption and drops more until the Vccrestart threshold is tripped. Now, the high voltage
start-up generator restarts and when the Vcc crosses again its turn on threshold the IC
starts switching. In this manner the power is transferred from mains to PFC output only
during a short time for each Trep cycle.
Figure 53. High-voltage start-up behaviour during latch-off protection
Figure 54. High-voltage start-up managing the dc-dc output short-circuit
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