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| 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： | 28/28页 |
| 文件大小： | 485K |
| 代理商： | TC642EUA |
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2002 Microchip Technology Inc.
DS21444C-page 9
TC642
5.0
TYPICAL APPLICATIONS
Designing with the TC642 involves the following:
(1) The temp sensor network must be configured to
deliver 1.25V to 2.65V on VIN for 0% to 100% of the
temperature range to be regulated.
(2) The minimum fan speed (VMIN) must be set.
(3) The output drive transistor and associated circuitry
must be selected.
(4) The SENSE network, RSENSE and CSENSE, must
be designed for maximum efficiency, while
delivering adequate signal amplitude.
(5) If shutdown capability is desired, the drive require-
ments of the external signal or circuit must be
considered.
The TC642 demonstration and prototyping board
(TC642DEMO), and the TC642 Evaluation Kit
(TC642EV), provide working examples of TC642 cir-
cuits and prototyping aids. The TC642DEMO is a
printed circuit board optimized for small size and ease
of inclusion into system prototypes. The TC642EV is a
larger board intended for benchtop development and
analysis. At the very least, anyone contemplating a
design using the TC642 should consult the documen-
tation for both TC642EV (DS21403) and TC642DEMO
(DS21401).
FIGURE 5-1:
Typical Application Circuit.
5.1
Temperature Sensor Design
The temperature signal connected to VIN must output a
voltage in the range of 1.25V to 2.65V (typical) for 0%
to 100% of the temperature range of interest. The
circuit in Figure 5-2 illustrates a convenient way to
provide this signal.
Figure 5-2 shows a simple temperature dependent
voltage divider circuit. RT1 is a conventional NTC ther-
mistor while R1 and R2 are standard resistors. The sup-
ply voltage, VDD, is divided between R2 and the parallel
combination of RT1 and R1 (for convenience, the paral-
lel combination of RT1 and R1 will be referred to as
RTEMP). The resistance of the thermistor at various
temperatures is obtained from the manufacturer’s
specifications. Thermistors are often referred to in
terms of their resistance at 25°C.
FAULT
SENSE
NTC
R1
R2
R3
R4
GND
Thermal
Shutdown
(Optional)
Note: *See cautions regarding latch-up considerations in Section 5.0, "Typical Applications".
Q1
+12V
+5V*
VDD
VIN
VMIN
VOUT
RBASE
RSENSE
CSENSE
CF
1 F
CF
TC642
Fan
CB
1 F
CB
0.01 F
CB
0.01 F
1
8
6
7
5
4
2
3
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相关代理商/技术参数 |
参数描述 |
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| 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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