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BM1C001F Datasheet(PDF) 9 Page - Rohm |
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BM1C001F Datasheet(HTML) 9 Page - Rohm |
9 / 35 page Datasheet Datasheet 9/32 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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