All Questions
Tagged with semiconductors power-electronics
56
questions
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1
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67
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I can't determine the value of diode zener
I can't determine the value of this Zener diode. The marking is KD H2.
-1
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1
answer
100
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Fixing hot plate and the heat sink, which thermoelectric module would produce more power?
Thermoelectric coolers (TECs) are typically used to generate temperature difference. Thermoelectric generators (TEGs), however, are used for power generation. While TECs are much cheaper than TEGs, ...
- 101
1
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0
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47
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Can anyone properly explain me the characteristic curve of the p-type JFET?
I know how a MOSFET works. But recently I wanted to know details about JFET.
When V(GS) = 0 volts there will obviously a current flowing through the p-type channel. What confuses me is how the ...
- 2,519
10
votes
2
answers
4k
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What is the difference between CPU transistors and generic ones?
Recently I had to build a h-bridge driver for my project, wireless power transmission. I learnt that I needed to have dead-time in my PWM signal given to IR2110, which doesn't have any dead-time ...
- 364
1
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1
answer
80
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Series limiting resistor?
I have used a 3.3V and a 4.7V Zener diode. What value series resistor do I need for them to work properly? The test current for 3.3V is 76mA and for 4.7V is 53mA.
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1
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148
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Zero Voltage in a power semiconductor chip
In an ON-mode silicon IGBT chip operating within a real power module, is the collector contact fixed at 0 V or emitter?
What about Power SiC MOSFET?
enter link description here
- 151
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1
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2k
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Majority Carrier Devices
Why majority carrier devices have higher ON state resistance compared to the ON state resistances of minority carrier devices?
- 47
3
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0
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135
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High frequency switching applications
I was reading that for high frequency switching applications with
semiconductors, the ratio of the electron to hole mobility should be high.
Why is it so? Is it a necessary condition always? Or ...
- 171
2
votes
0
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116
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How does a MOSFET conduct in saturation region?
It is a simple question but I could not find a straightforward answer.
When a MOSFET enters saturation region, the channel length starts to decrease, and the channel width is the smallest near the ...
0
votes
1
answer
219
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How deep does the depletion region in power diode penetrate the lightly doped n- layer under no bias?
I could find references for describing the depletion layer in a power diode under reverse bias and the consequent classification of Non-punch through and Punch-through diodes. But I couldn't find a ...
12
votes
1
answer
2k
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Why do power diodes have a p+ n- n+ construction and why not p+ p- n+?
I've been learning about power diodes and how they differ from low power diodes with the addition of a lightly doped n-type layer.
This n-type layer improves the breakdown voltage rating of the ...
1
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1
answer
538
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Ic and Vce equations of IGBT
I know in IGBTs while operating, parameters Ic (collector current) and Vce (collector-emitter voltage) are Tj (junction temperature) and Vge (gate-emitter voltage) dependent. Is there anything else ...
- 49
1
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1
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252
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Calculation of Vce from Ic-Vge Characteristic
We have found the Ic-Vge (collector current vs gate-emitter voltage) characteristic of an IGBT device as shown below at a high Vce (collector-emitter voltage) value (here 20V) from the datasheet (...
- 49
0
votes
2
answers
818
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Ic-Vge IGBT Curve
In the figure below, presented in the manufacturer datasheet, you can see the Ic-Vge curve of an IGBT device. As mentioned, it has been drawn at Vce=20V. What does this equality mean? Can we have such ...
- 49
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261
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How could the Gate-Source potential difference be neglected?
I’ve been reading the book
Electronic Principles by Malvino
In the Voltage-Divider bias section of JFET, if gate current is negligible then how did Gate Voltage attain a negative value, given Vdd ...
