Questions tagged [half-bridge]
8 questions
6
votes
4 answers
Schottky diode between the gate and source in half-bridge power section
Why some MOSFET half-bridge power sections have Schottky diodes between the source and the gate of MOSFTETs? For example D1 and D5 in the schematics here:
jpou
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3
votes
1 answer
Gate spikes in half-bridge IR2110 driven
Some time ago I posted a question about weird oscillograms of half-bridge, gate spikes on mosfet openings. After some investigation, it was revealed that the problem is not in transformer leakage inductance. When the upper or lower MOSFET is turning…
Erch
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2
votes
2 answers
How much voltage must a MOSFET withstand in a half-bridge configuration?
It seems a bit silly and I guess I know the answer but I don't know why it gave me some confusion, in a half-bridge configuration like the one in the image:
If between DC-Bus+ and DC-Bus- there is a voltage of 400VDC (for example), the voltage that…
WalterPH
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1
vote
2 answers
Half-bridge oscillogram spikes, possible shoot through
I built a half-bridge smps based on IR2110S, it is working but the oscillograms seems weird and mosfets are a little hot.
LOW side mosfet Vds.
Two oscillograms, mosfets midpoint as oscilloscope ground, probe on rail and probe on gnd. Lower…
Erch
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0
votes
0 answers
Active Half-Bridge Driver Circuit
Consider the folLowing half bridge circuit:
I'm designing a half-bridge circuit to be controlled by a microcontroller. Ultimately, there will be 3 copies of this circuit for an ESC. I am hoping to have reasonably fast switching times for the power…
0
votes
0 answers
Only using low side of high/low mosfet driver - can I leave the high pins disconnected?
I have the below circuit for a high/low mosfet driver half bridge, with an extra low side for running a brake resistor (note this is just one of the 3 half bridges for the BLDC controller)
I'm using the same high/low driver for the extra low side,…
Simm
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0
votes
1 answer
Half-Bridge with N-channel Mosfets and IR2101
I am building a half-bridge with IR2101 as half bridge driver and I am being confused by something in the datasheet of IR2101. My main supply voltage will be 40V. The VCC of the IR2101 will be 15V stepped down from the same supply. Below is the…
Muhammad Usman
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0
votes
2 answers
Why I'm getting different values than the simulator in precision half-wave rectifier?
I've build this circuit on the breadboard and with 5V AC I'm getting 2.5V at the output:
simulate this circuit – Schematic created using CircuitLab
The problem is in the simulator it outputs 1.678V, which calculates to:
(1.678 x 2) / 0.636 =…
ElectronSurf
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