參數(shù)資料
型號： TC642EV
廠商： Microchip Technology Inc.
英文描述： PWM Fan Speed Controller with FanSense⑩ Technology
中文描述： 與FanSense PWM風扇速度控制器⑩技術
文件頁數(shù)： 13/28頁
文件大?。?/td> 485K
代理商： TC642EV
2002 Microchip Technology Inc.
DS21444C-page 13
TC642
Some applications require the fan to be powered from
the negative 12V supply to keep motor noise out of the
positive voltage power supplies. As is shown in
Figure 5-8, zener diode D
1
offsets the -12V power sup-
ply voltage, holding transistor Q
1
off when V
OUT
is low.
When V
OUT
is high, the voltage at the anode of D
1
increases by V
OUT
, causing Q
1
to turn on. Operation is
otherwise consistent with the case of fan operation
from +12V.
FIGURE 5-7:
Output Drive Transistor Circuit Topologies.
FIGURE 5-8:
Powering the Fan From a -12V Supply.
Q
1
Q
1
Q
2
GND
VDD
R
SENSE
R
BASE
V
OUT
V
OUT
Fan
a) Single Bipolar Transistor
Q
1
GND
V
DD
R
SENSE
V
OUT
c) N-Channel MOSFET
GND
V
DD
R
SENSE
R
BASE
Fan
b) Darlington Transistor Pair
Fan
GND
+5V
Q
1
*
V
DD
V
OUT
TC642
Fan
R
2
*
2.2 k
R
3
*
2.2
R
4
*
10 k
D
12.0V
Zener
-12V
*Note:
Value depends on the specific application and is shown for example only.
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相關代理商/技術參數(shù)
參數(shù)描述
TC642EV 制造商:Microchip Technology Inc 功能描述:Tools Development kit For Use
TC642VOA 功能描述:馬達/運動/點火控制器和驅(qū)動器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
TC642VOA713 功能描述:馬達/運動/點火控制器和驅(qū)動器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
TC642VPA 功能描述:馬達/運動/點火控制器和驅(qū)動器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
TC642VUA 功能描述:馬達/運動/點火控制器和驅(qū)動器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
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