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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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TC651ACUATR Datenblatt(PDF) 9 Page - STMicroelectronics |
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TC651ACUATR Datenblatt(HTML) 9 Page - STMicroelectronics |
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9 / 16 page  2004 Microchip Technology Inc. DS21450C-page 9 TC650/TC651 5.0 TYPICAL APPLICATIONS 5.1 Reducing Switching Noise For fans consuming more than 300 mA, a slowdown capacitor (CSLOW) is recommended for reducing switching PWM induced noise (see Figure 5-1). The value of this capacitor should be 4.7 µF to 47 µF, depending on the fan current consumption. See Application Note 771, “Suppressing Acoustic Noise in PWM Fan Speed Control Systems” (DS00771), for more information. FIGURE 5-1: Reducing Switching Noise. 1 8 27 3 6 4 5 NC VDD CSLOW PWM GND TOVER NC GND GND +5V VDD +12V TC650 TC651 SHDN GND PICmicro® DC Fan 500 mA SHDN Control Overtemperature Alert Microcontroller |
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