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參數(shù)資料
| 型號： | MSK3018 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | MOSFETs |
| 英文描述： | 30V N-Channel PowerTrench MOSFET |
| 中文描述： | 30V的N溝道的PowerTrench MOSFET的 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大小： | 325K |
| 代理商： | MSK3018 |
This deadtime should allow for the turn on and turn off time of the transistors, especially when slowing them down with gate
resistors. This situation will be present when switching motor direction, or when sophisticated timing schemes are used for servo
systems such as locked antiphase PWM'ing for high bandwidth operation.
APPLICATION NOTES
N-CHANNEL GATES (Q2,Q4,Q6)
For driving the N-Channel gates, it is important to keep in mind that it is essentially like driving a capacitance to a sufficient
voltage to get the channel fully on. Driving the gates to +15 volts with respect to their sources assures that the transistors are on.
This will keep the dissipation down to a minimum level [R
DS(ON)
specified in the data sheet]. How quickly the gate gets turned ON
and OFF will determine the dissipation of the transistor while it is transitioning from OFF to ON, and vice-versa. Turning the gate
ON and OFF too slow will cause excessive dissipation, while turning it ON and OFF too fast will cause excessive switching noise
in the system. It is important to have as low a driving impedance as practical for the size of the transistor. Many motor drive IC's
have sufficient gate drive capability for the MSK 3018. If not, paralleled CMOS standard gates will usually be sufficient. A series
resistor in the gate circuit slows it down, but also suppresses any ringing caused by stray inductances in the MOSFET circuit. The
selection of the resistor is determined by how fast the MOSFET wants to be switched. See Figure 1 for circuit details.
P-CHANNEL GATES (Q1,Q3,Q5)
Most everything applies to driving the P-Channel gates as the N-Channel gates. The only difference is that the P-Channel gate to
source voltage needs to be negative. Most motor drive IC's are set up with an open collector or drain output for directly interfacing
with the P-channel gates. If not, an external common emitter switching transistor configuration (see Figure 2) will turn the P-
Channel MOSFET on. All the other rules of MOSFET gate drive apply here. For high supply voltages, additional circuitry must be
used to protect the P-Channel gate from excessive voltages.
BRIDGE DRIVE CONSIDERATIONS
It is important that the logic used to turn ON and OFF the various transistors allow sufficient "dead time" between a high side
transistor and its low side transistor to make sure that at no time are they both ON. When they are, this is called "shoot-through",
and it places a momentary short across the power supply. This overly stresses the transistors and causes excessive noise as well.
See Figure 3.
Figure 1
Figure 2
Rev. A 7/00
3
Figure 3
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MSK3020 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:H-BRIDGE MOSFET POWER MODULE |
| MSK35 | 制造商:Marathon Special Products 功能描述:END BRACKET SECTIONAL TERMINAL BLOCK 制造商:MARATHON 功能描述:END BRACKET, SECTIONAL TERMINAL BLOCK 制造商:MARATHON 功能描述:END BRACKET, SECTIONAL TERMINAL BLOCK; Series:MIK 5; Accessory Type:End Bracket; For Use With:Sectional Terminal Blocks; Body Material:Polyamide; Color:Gray; Current Rating:40A; Depth:6mm; Height:38mm; Line Wire Range:#22-#10 AWG ;RoHS Compliant: Yes 制造商:Marathon Special Products 功能描述:Terminal Block |
| MSK3554 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:HIGH SPEED, WIDEBAND OPERATIONAL AMPLIFIER |
| MSK3554B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:HIGH SPEED, WIDEBAND OPERATIONAL AMPLIFIER |
| MSK35W | 制造商:Marathon Special Products 功能描述: |
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