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FAN6755UWMY Folha de dados(PDF) 4 Page - Fairchild Semiconductor |
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FAN6755UWMY Folha de dados(HTML) 4 Page - Fairchild Semiconductor |
4 / 17 page © 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6755W / FAN6755UW • Rev. 1.0.7 4 Pin Configuration Figure 4. Pin Configuration (Top View) Pin Definitions Pin # Name Description 1 VIN Line-voltage detection. The line-voltage detection is used for brownout protection with hysteresis. Constant output power limit over universal AC input range is also achieved using this VIN pin. It is suggested to add a low-pass filter to filter out line ripple on the bulk capacitor. Pulling VIN HIGH also triggers auto-restart protection. 2 FB The signal from the external compensation circuit is fed into this pin. The PWM duty cycle is determined in response to the signal on this pin and the current-sense signal on the SENSE pin. 3 SENSE Current sense. The sensed voltage is used for peak-current-mode control and cycle-by-cycle current limiting. 4 GND Ground 5 GATE The totem-pole output driver. Soft-driving waveform is implemented for improved EMI. 6 VDD Power supply. The internal protection circuit disables PWM output as long as VDD exceeds the OVP trigger point. 7 HV For startup, this pin is connected to the line input or bulk capacitor in series with resistors. SOP-7 VIN VDD GATE HV GND SENSE FB 1 7 6 5 4 2 3 |
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