參數(shù)資料
型號(hào)： TC647VUA
廠商： Microchip Technology Inc.
英文描述： PWM Fan Speed Controller with FanSense Technology
中文描述： 與FanSense PWM風(fēng)扇速度控制器技術(shù)
文件頁(yè)數(shù)： 15/28頁(yè)
文件大?。?/td> 478K
代理商： TC647VUA
2002 Microchip Technology Inc.
DS21447C-page 15
TC647
FIGURE 5-9:
Design Example.
5.8
TC647 as a Microcontroller
Peripheral
In a system containing a microcontroller or other host
intelligence, the TC647 can be effectively managed as
a CPU peripheral. Routine fan control functions can be
performed by the TC647 without controller intervention.
The microcontroller receives temperature data from one
or more points throughout the system. It calculates a fan
operating speed based on an algorithm specifically
designed for the application at hand. The processor
controls fan speed using complimentary port bits I/O1
through I/O3. Resistors R
1
through R
6
(5% tolerance)
form a crude 3-bit DAC that translates the 3-bit code
from the controller or processor's outputs into a 1.6V DC
control signal. A monolithic DAC or digital pot may be
used instead of the circuit shown in Figure 5-10.
With V
MIN
set to 1.8V, the TC647 has a minimum
operating speed of approximately 40% of full rated
speed when the processor's output code is 000[B].
Output codes 001[B] to 111[B] operate the fan from
roughly 40% to 100% of full speed. An open-drain
output from the processor I/O can be used to reset the
TC647 following detection of a fault condition. The
FAULT output can be connected to the processor's
interrupt input, or to an I/O pin, for polled operation (see
Figure 5-10).
FAULT
SENSE
NTC
10 k
@ 25
°
C
R1
20.5 k
R2
3.83 k
R5
33 k
R7
800
R6
18 k
R8
10 k
GND
Fan Shutdown
(Optional)
Q1
Q2
+12V
+5V
+5V
+5V
V
DD
V
IN
V
MIN
V
OUT
RSENSE
2.2
CSENSE
0.1 μF
C1
1 μF
C
F
TC647
Fan
C
B
0.01 μF
+
8
4
6
7
5
2
3
1
System
Fault
C
B
0.01 μF
C
B
1 μF
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TC648 Fan Speed Controller with Auto-Shutdown and Over-Temperature Alert
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TC647VUATR 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
TC648 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Fan Speed Controller with Auto-Shutdown and Over-Temperature Alert
TC648_13 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Fan Speed Controller with Auto-Shutdown and Over-Temperature Alert
TC648B 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:PWM Fan Speed Controllers With Auto-Shutdown, Fan Restart and FanSense⑩ Technology for Fault Detection
TC648BEOA 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Shtdn & Over-T Alert 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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
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