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參數(shù)資料
| 型號(hào)： | TC665EUN |
| 元件分類(lèi)： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO10 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁(yè)數(shù)： | 18/36頁(yè) |
| 文件大?。?/td> | 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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相關(guān)代理商/技術(shù)參數(shù) |
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| TC665EUNTR | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Single RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| TC67 | 功能描述:鋁質(zhì)電解電容器 - 帶引線(xiàn) 40uF 350V RoHS:否 制造商:Kemet 引線(xiàn)類(lèi)型: 電容:220 uF 容差:20 % 電壓額定值:25 V 工作溫度范圍: 端接類(lèi)型:Radial 外殼直徑:8 mm 外殼長(zhǎng)度:11 mm 引線(xiàn)間隔:5 mm 產(chǎn)品:General Purpose Electrolytic Capacitors 封裝:Bulk |
| TC670 | 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:Tiny Predictive Fan Failure Detector |
| TC670_03 | 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:Tiny Predictive Fan Failure Detector |
| TC670_13 | 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:Tiny Predictive Fan Failure Detector |
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