参数资料
型号: TC642DEMO
厂商: Microchip Technology
文件页数: 13/14页
文件大小: 0K
描述: DEMO BOARD FOR TC642/46/47/48/49
标准包装: 1
M
TC64X/TC64XB FAN CONTROL DEMO
BOARD USER ’S GUIDE
Appendix B. Bill-of-Materials (BOM)
B.1
DEMO BOARD COMPONENTS
Table B-1 lists typical components and the associated values that comprise the
TC64X/TC64XB Fan Control Demo Board.
TABLE B-1:
FAN CONTROL MODULE COMPONENTS LIST
Component
C 1
C 2
C 3
C 4
C 5
C 6
C 7
C 8
LED
Q 1 , Q 2
Q 3
Q 4
R 1 , R 2
R 3 , R 4
R 5
R 6
R 7
R 8
U 1
Typical Value
10 μF Radial Electrolytic
Capacitor
0.01 μF Ceramic Disk Capacitor
0.01 μF Ceramic Disk Capacitor
1.0 μF Ceramic Capacitor
Not used
0.1 μF Ceramic Disk Capacitor
0.47 μF to 1 μF Radial
Electrolytic Capacitor
0.01 μF Ceramic Disk Capacitor
10 mA Miniature LED
2N2222A NPN Transistor
See Applications section of
TC64X and TC64XB data
sheets.
2N3906 (or Equivalent) PNP
Transistor
See the Applications section of
the TC64X and TC64XB data
sheets.
See the Applications section of
the TC64X and TC64XB data
sheets.
See the Applications section of
the TC64X and TC64XB data
sheets.
See Applications section of the
TC64X and TC64XB data
sheets.
1.2 k ? , 1/4 Watt, 5% Resistor
470 ?, 1/4 Watt, 5% Resistor
TC642/B, TC646/B, TC647/B,
TC648/B or TC649/B Fan
Control devices
Comments
Power supply filter.
Bypass capacitor.
Bypass capacitor.
PWM capacitor. Typical value is 1.0 μF (PWM frequency of 30 Hz).
SENSE input coupling capacitor.
Fan acoustic noise suppression capacitor. (Optional)
Bypass capacitor.
LED lights when FAULT output is LOW (active). (Optional)
Darlington pair output option. If used, Q3 location MUST be left
open.
Single transistor output option. Can be bipolar transistor or logic
level MOSFET (depending on cost constraints and fan current). If
used, Q 1 and Q 2 locations MUST be left open.
LED Driver transistor (Optional).
Value depends on the type of sensor used and the desired fan
speed vs. temperature profile.
Value depends on the desired minimum fan speed setting
(TC642/2B, TC647/7B) or auto-shutdown temperature (TC646/6B,
TC648/8B, TC649/9B).
Base current limiting resistor. Value depends on the type of fan and
driver used. Typical values appear in Table B-1.
Fan Current sensing resistor. Value depends on full-speed fan
current. Typical values are shown in Table B-1.
LED Drive transistor base resistor (Optional).
LED Drive transistor series-limiting resistor (Optional).
? 2003 Microchip Technology Inc.
DS21401C-page 9
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