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参数资料
| 型号： | TC642EUA |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| 封装： | PLASTIC, MSOP-8 |
| 文件页数： | 7/28页 |
| 文件大小： | 485K |
| 代理商： | TC642EUA |
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2002 Microchip Technology Inc.
DS21444C-page 15
TC642
5.7
Power Supply Routing and
Bypassing
Noise present on the VIN and VMIN inputs may cause
erroneous operation of the FAULT output. As a result,
these inputs should be bypassed with a 0.01
F
capacitor mounted as close to the package as is possi-
ble. This is particularly true of VIN, which is usually
driven from a high impedance source (such as a ther-
mistor). In addition, the VDD input should be bypassed
with a 1 F capacitor. Grounds should be kept as short
as possible. To keep fan noise off the TC642 ground
pin, individual ground returns for the TC642 and the low
side of the fan current sense resistor should be used.
Design Example
Step 1. Calculate R1 and R2 based on using an NTC
having a resistance of 10 k
at TMIN (25°C)
and 4.65 k
R1 = 20.5 k
R2 = 3.83 k
Step 2. Set minimum fan speed VMIN = 1.8V.
Limit the divider current to 100 A from which
R5 = 33 k and R6 = 18 k.
Step 3. Design the output circuit.
Maximum fan motor current = 250 mA.
Q1 beta is chosen at 50 from which
R7 = 800 .
FIGURE 5-9:
Design Example.
FAULT
SENSE
NTC
10 k
@ 25C
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
VDD
VIN
VMIN
VOUT
RSENSE
2.2
CSENSE
0.1
F
C1
1
F
CF
TC642
Fan
CB
0.01 F
CB
0.01
F
+
CB
1
F
8
4
6
7
5
2
3
1
Fan/
Thermal Fault
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC642EUA713 | 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 |
| TC642EV | 功能描述:电源管理IC开发工具 For TC642/6/7/8/9 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| 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 |
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