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TC651ADUATR Fiches technique(PDF) 9 Page - STMicroelectronics

No de pièce TC651ADUATR
Description  Tiny Integrated Temperature Sensor & Brushless DC Fan Controller with Overtemperature Alert
PDF  16 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TC651ADUATR Fiches technique(HTML) 9 Page - STMicroelectronics

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 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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