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参数资料
| 型号： | TC642EV |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | PWM Fan Speed Controller with FanSense⑩ Technology |
| 中文描述： | 与FanSense PWM风扇速度控制器⑩技术 |
| 文件页数： | 16/28页 |
| 文件大小： | 485K |
| 代理商： | TC642EV |
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TC642
DS21444C-page 16
2002 Microchip Technology Inc.
5.8
TC642 as a Microcontroller
Peripheral
In a system containing a microcontroller or other host
intelligence, the TC642 can be effectively managed as
a CPU peripheral. Routine fan control functions can be
performed by the TC642 without processor 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 complementary 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 processor's outputs into a 1.6V DC control sig-
nal. 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 TC642 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/O0) can be used to reset
the TC642 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.
FIGURE 5-10:
TC642 as a Microcontroller Peripheral.
TC642
V
IN
C
F
V
MIN
GND
V
DD
V
OUT
FAULT
SENSE
(Optional)
(MSB)
R
1
110 k
R
2
240 k
R
3
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
.01
μ
F
+
1
μ
F
C
B
.01
μ
F
Fan
+12V
+5V
C
B
1
μ
F
7
+
800
+5V
R
10
10 k
0.1
μ
F
2N2222A
R
11
2.2
1
2
3
4
5
6
8
(RESET)
CMOS
Microcontroller
+5V
Analog or Digital
Temperature
Data from one or
more Sensors
I/O0
I/O1
I/O2
I/O3
INT
GND
CMOS
Outputs
Open-drain
Outputs
R
9
相关PDF资料 |
PDF描述 |
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| TC654EUN | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
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| TC655 | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC665EUN | SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC642EV | 制造商:Microchip Technology Inc 功能描述:Tools Development kit For Use |
| TC642VOA | 功能描述:马达/运动/点火控制器和驱动器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TC642VOA713 | 功能描述:马达/运动/点火控制器和驱动器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TC642VPA | 功能描述:马达/运动/点火控制器和驱动器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TC642VUA | 功能描述:马达/运动/点火控制器和驱动器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
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