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参数资料
| 型号： | TC646VOA713 |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SOIC-8 |
| 文件页数： | 6/28页 |
| 文件大小： | 473K |
| 代理商： | TC646VOA713 |
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TC646
DS21446C-page 14
2002 Microchip Technology Inc.
A base-current limiting resistor is required with bipolar
transistors. This is shown in Figure 5-6.
FIGURE 5-6:
Circuit For Determining
RBASE.
The correct value for this resistor can be determined as
follows:
VOH
= VRSENSE + VBE(SAT) + VRBASE
VRSENSE = IFAN x RSENSE
VRBASE
= RBASE x IBASE
IBASE
= IFAN / hFE
“Electrical Characteristics”; VBE(SAT) is given in the
chosen transistor data sheet. It is now possible to solve
for RBASE.
EQUATION
Some applications benefit from the fan being powered
from a negative supply to keep motor noise out of the
positive supply rails. This can be accomplished as
power supply voltage, holding transistor Q1 off when
VOUT is low. When VOUT is high, the voltage at the
anode of D1 increases by VOUT, causing Q1 to turn on.
Operation is otherwise the same as in the case of fan
operation from +12V.
FIGURE 5-7:
Output Drive Transistor Circuit Topologies.
Q1
GND
VDD
RSENSE
RBASE
VOH = 80% VDD
+ V
RBASE
–
VBE
(SAT)
–
+
VR
SENSE
–
Fan
+
RBASE =
VOH - VBE(SAT) - VRSENSE
IBASE
Q1
Q2
GND
VDD
RSENSE
RBASE
VOUT
Fan
a) Single Bipolar Transistor
Q1
GND
VDD
RSENSE
VOUT
c) N-Channel MOSFET
GND
VDD
RSENSE
RBASE
Fan
b) Darlington Transistor Pair
Fan
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| TC646EOA713 | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC646VUA713 | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC646VOA | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC646VOATR | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC646VPA | BRUSHLESS DC MOTOR CONTROLLER, PDIP8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC646VPA | 功能描述:马达/运动/点火控制器和驱动器 Shtdn & 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 |
| TC646VUA | 功能描述:马达/运动/点火控制器和驱动器 Shtdn & 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 |
| TC646VUA713 | 功能描述:马达/运动/点火控制器和驱动器 Shtdn & 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 |
| TC647 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controller with FanSense Technology |
| TC647_13 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controller with FanSensea?￠ Technology |
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