NCP1615_16 datasheet(24/46 Pages) ONSEMI

Part #	NCP1615

Description	High Voltage High Efficiency Power Factor Correction Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1615

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24

Figure 21. Start−Up Timing Diagram

A timer is enabled once VHV drops below its disable

threshold, VBO(stop), typically 100 V. The controller is

disabled if VHV doesn’t exceed VBO(stop) before the

brownout timer expires, tBO, typically 54 ms. The timer is

set long enough to ignore a single cycle dropout. The timer

ramp starts charging once VHV drops below VBO(stop).

Figure 22 shows brownout detector waveforms during line

dropout.

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