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BM1C001F Datasheet(PDF) 9 Page - Rohm

Part # BM1C001F
Description  Power Factor Correction and Quasi-Resonant DC/DC converter IC
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BM1C001F Datasheet(HTML) 9 Page - Rohm

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TSZ02201-0F1F0A200010-1-2
© 2013 ROHM Co., Ltd. All rights reserved.
29.Aug.2013 Rev.002
www.rohm.com
TSZ22111
・15・001
BM1C001F
(5-3) PFC Output Voltage Switching Function
For AC input voltage that varies by region, in order to be as constant as possible boosting ratio by changing the PFC output
voltage, PFC is switching the output voltage by AC240V or AC100V-based systems. Thereby, PFC output voltage is changed
from 400V to 260V in the case of AC100V-based input. As a result, efficiency is improved.
This feature will detect if the system is AC240V or AC100V based in number and voltage level of the AC waveform that is
input to the BR pin. (Refer to Figure 14). See the timing chart of Figure 15, If the waveform (voltage higher than the voltage
detection ACIN (Th.=2.5V)) of 9 cycles is entered continuously, The PFC determines the AC240V system. In that case, PFC
changes the GM amplifier reference and the PFC output is changed to 400V from 260V.
Figure 14. PFC output voltage switching function
Figure 15. PFC output voltage switching Timing Chart


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