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TC650 Fiches technique(PDF) 7 Page - Microchip Technology

No de pièce TC650
Description  Tiny Integrated Temperature Sensor & Brushless DC Fan Controller with Over-Temperature Alert
PDF  14 Pages
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Fabricant  MICROCHIP [Microchip Technology]
Site Internet  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC650 Fiches technique(HTML) 7 Page - Microchip Technology

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© 2002 Microchip Technology Inc.
DS21450B-page 7
TC650/TC651
4.0
TYPICAL APPLICATIONS
4.1
Reducing Switching Noise
For fans consuming more than 300mA, a slowdown
capacitor (CSLOW) is recommended for reducing
switching PWM induced noise (see Figure 4-1). The
value of this capacitor should be 4.7
µFto47µF,
depending on the fan current consumption.
See Application Note AN771 “Suppressing Acoustic
Noise in PWM Fan Speed Control Systems” for more
information.
FIGURE 4-1:
REDUCING SWITCHING
NOISE
1
8
2
7
3
6
4
5
NC
VDD
CSLOW
PWM
GND
TOVER
NC
GND
GND
+5V VDD
+12V
TC650
TC651
SHDN
GND
µController
DC Fan
500mA
SHDN Control Over-Temp.
Alert



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