參數(shù)資料
型號(hào)： TC649EPA
廠商： Microchip Technology Inc.
英文描述： PWM Fan Speed Controller with Auto-Shutdown and FanSense⑩ Technology
中文描述： PWM風(fēng)扇帶自動(dòng)調(diào)速器關(guān)斷和FanSense⑩技術(shù)
文件頁(yè)數(shù)： 16/28頁(yè)
文件大?。?/td> 478K
代理商： TC649EPA
TC649
DS21449C-page 16
2002 Microchip Technology Inc.
5.8
TC649 as a Microcontroller
Peripheral
In a system containing a microcontroller or other host
intelligence, the TC649 can be effectively managed as
a CPU peripheral. Routine fan control functions can be
performed by the TC649 without processor interven-
tion. 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 complementary
port bits I/O1 through I/O3. Resistors R
1
through R
6
.
(5% tolerance) form a crude 3-bit DAC that translates
this 3-bit code from the 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
AS
set at 1.8V, the TC649 enters auto-shutdown
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/O0) can be used to reset the TC649
following detection of a fault condition. The FAULT out-
put can be connected to the processor's interrupt input
or to another I/O pin for polled operation.
FIGURE 5-10:
TC649 as a Microcontroller Peripheral.
FIGURE 5-11:
V
RELEASE
vs. Temperature.
CMOS
Microcontroller
TC649
V
IN
C
F
V
AS
GND
V
DD
V
OUT
SENSE
+5V
Analog or Digital
Temperature Data from
One or more Sensors
I/O1
I/O2
I/O3
INT
GND
(Optional)
(MSB)
R
1
110 k
R
2
240 k
R3
360 k
(LSB)
R
5
1.5 k
+5V
R
6
1 k
R
4
18 k
R
7
33 k
+5V
R
8
18 k
C
B
.01μF
+
1μF
CB
.01 μF
CMOS
Outputs
Open-Drain
Output
Fan
+12V
+5V
C
B
1 μF
R
9
800
+5V
R
10
10 k
0.1 μF
2N2222A
R
11
2.2
(RESET)
1
2
3
4
5
6
FAULT
7
8
I/O0
V
RELEASE
vs. Temperature
V
R
0C
25C
TEMPERATURE
85C
V
DD
= 3.0V
V
DD
= 4.0V
V
DD
= 5.0V
V
DD
= 5.5V
1.0
0.9
0.8
0.7
0.6
0.5
0.4
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TC649EUA 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Shtdn & 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
TC649EUATR 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Shtdn & 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
TC649VOA 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Shtdn & 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
TC649VOATR 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Shtdn & 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
TC649VPA 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Shtdn & 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
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