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| 型號： | STD90NH02L-1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | N-channel 24V - 0.0052ohm - 60A - DPAK/IPAK STripFET TM Power MOSFET |
| 中文描述： | N溝道24V的- 0.0052ohm -第60A條-的DPAK /像是iPak STripFET商標功率MOSFET |
| 文件頁數(shù)： | 9/16頁 |
| 文件大小： | 460K |
| 代理商： | STD90NH02L-1 |
STD90NH02L- STD90NH02L-1
Appendix A
9/16
4
Appendix A
The power losses associated with the FETs in a synchronous buck converter can be
estimated using the equations shown in the table below. The formulas give a good
approximation, for the sake of performance comparison, of how different pairs of devices
affect the converter efficiency. However a very important parameter, the working
temperature, is not considered. The real device behavior is really dependent on how the
heat generated inside the devices is removed to allow for a safer working junction
temperature.
The low side (SW2) device requires:
Very low R
DS(on)
to reduce conduction losses
Small Qgls to reduce the gate charge losses
Small Coss to reduce losses due to output capacitance
Small Qrr to reduce losses on SW1 during its turn-on
The Cgd/Cgs ratio lower than Vth/Vgg ratio especially with low drain to source
voltage to avoid the cross conduction phenomenon;
The high side (SW1) device requires:
Small Rg and Ls to allow higher gate current peak and to limit the voltage feedback on
the gate
Small Qg to have a faster commutation and to reduce gate charge losses
Low R
DS(on)
to reduce the conduction losses.
●
●
●
●
●
●
●
●
●
●
●
Figure 19.
Buck converter: power losses estimation
Table 6.
Power losses calculation
High side switching (SW1)
Low side switch (SW2)
Pconduction
Pswitching
Zero Voltage Switching
δ
*
I
R
2
L
DS(on)SW1
)
1
*
I
R
2
L
DS(on)SW2
δ
g
L
I
I
*
f
*
)
Q
(Q
*
V
gd(SW1)
gsth(SW1)
in
+
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| STD90NH02LT4 | 功能描述:MOSFET N-Ch 24 Volt 60 Amp RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube |
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| STD920BLK | 功能描述:LED 安裝硬件 .2" DIA X .92" BLACK RoHS:否 制造商:Bivar 產(chǎn)品:LED Mounting Clips LED 大小:5 mm 材料:Nylon 顏色:Black 主體長度:4.4 mm 面板厚度尺寸: 封裝:Bulk |
| STD93003 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH VOLTAGE FAST-SWITCHING PNP POWER TRANSISTOR |
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