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| 型号： | TC665EUN |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO10 |
| 封装： | PLASTIC, MSOP-10 |
| 文件页数： | 18/36页 |
| 文件大小： | 695K |
| 代理商： | TC665EUN |
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2002 Microchip Technology Inc.
DS21737A-page 25
TC664/TC665
MOSFETs are very low, the TC664/TC665 devices can
charge and discharge them very quickly leading to very
fast edges. Of key concern is the turn-off edge of the
MOSFET. Since the fan motor winding is essentially an
inductor, when the MOSFET is turned off, the current
that was flowing through the motor wants to continue to
flow. If the fan does not have internal clamp diodes
around the windings of the motor, there is no path for
this current to flow through and the voltage at the drain
of the MOSFET may rise until the drain to source rating
of the MOSFET is exceeded. This will most likely cause
the MOSFET to go into avalanche mode. Since there is
very little energy in this occurrence, it will probably not
fail the device, but it would be a long term reliability
issue. The following is recommended:
Ask how the fan is designed. If the fan has clamp
diodes internally, you will not experience this
problem. If the fan does not have internal clamp
diodes, it is a good idea to put one externally
(Figure 7-8). You can also put a resistor between
VOUT and the gate of the MOSFET, which will help
slow down the turn-off and limit this condition.
FIGURE 7-7:
Output Drive Device Configurations.
TABLE 7-2:
FAN DRIVE DEVICE SELECTION TABLE (NOTE 2)
Device
Package
Max Vbe sat /
Vgs(V)
Min hfe
Vce/VDS
Fan Current
(mA)
Suggested
Rbase (ohms)
MMBT2222A
SOT-23
1.2
50
40
150
800
MPS2222A
TO-92
1.2
50
40
150
800
MPS6602
TO-92
1.2
50
40
500
301
SI2302
SOT-23
2.5
NA
20
500
MGSF1N02E
SOT-23
2.5
NA
20
500
SI4410
SO-8
4.5
NA
30
1000
SI2308
SOT-23
4.5
NA
60
500
Note 1: A series gate resistor may be used in order to control the MOSFET turn-on and turn-off times.
2: These drive devices are suggestions only. Fan currents listed are for individual fans.
Q1
GND
VDD
RSENSE
RBASE
VOUT
FAN
a) Single Bipolar Transistor
Q1
GND
VDD
RSENSE
VOUT
b) N-Channel MOSFET
FAN
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC665EUNTR | 功能描述:马达/运动/点火控制器和驱动器 Single 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 |
| TC67 | 功能描述:铝质电解电容器 - 带引线 40uF 350V RoHS:否 制造商:Kemet 引线类型: 电容:220 uF 容差:20 % 电压额定值:25 V 工作温度范围: 端接类型:Radial 外壳直径:8 mm 外壳长度:11 mm 引线间隔:5 mm 产品:General Purpose Electrolytic Capacitors 封装:Bulk |
| TC670 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Tiny Predictive Fan Failure Detector |
| TC670_03 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Tiny Predictive Fan Failure Detector |
| TC670_13 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Tiny Predictive Fan Failure Detector |
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