Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [ir2101]

11 questions
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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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Half-bridge driver IR2101 shorting high side and low side (In a weird condition)

I am making my own FOC BLDC driver, but there is a weird problem when I control the gate driver using PWM. I am using three IR2101 driver IC to drive the six N-FETs, and I am using an STM32 (Blue pill) to output a PWM signal to the driver. As I…
Dennis Chang
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MOSFET driver IR2101 output (HO) stays high

I am trying to make BLDC driver with IR2101. MOSFETs I am using are IRFB4110PBF. So for testing I am currently using one pair. I am using oscilloscope to see the output waveform. What I see is that it always remain high as soon as I attach power.…
dharmikP
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Functionality of IR2101 driver

Please tell me the use of high-side floating supply voltage (VB) and high-side floating supply offset voltage (VS) in the IR2101 (datasheet) driver circuit and also the use of capacitor between them.
anmol kumar
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Homemade BLDC controller not functioning (IR2101)

I’m trying to make a controller with 3 H bridges (N-FET, IR2101 and a Arduino Mega). I’m sure that the problem is in my code but I don’t know how to fix it. I think that the problem is in the PWM.The pwm is the same in all phases. AH, BH and CH have…
Gustavo Carluccio
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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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Is it possible to use an IR2101S as just a low-side driver?

I know the IR2101 from reading all the other post is good for using two N-channel MOSFETs. It also states it has to be fed a square wave/PWM signal to get the bootstrapping to work correctly. I was wondering if I could just use the low-side driver…
mScientist
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Driving H-bridge with IR2101

I found a 500W inverter implementation with an Arduino Nano and IR2101. According to its schematic, I think the input connections of both IR2101 are wrong. If it is wrong, then why is this circuit is working fine in the video? Did I get it…
Deepak
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Bootstrapping circuit in IR2101

Please explain how the bootstrapping circuit help in driving both the mosfets connected to IR2101 driver.Please explain this by taking an example of any voltage so that I can understand easily.Explain how the capacitor charging and discharging…
anmol kumar
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Asking for help about gate drive circuit of a bidirectional dc-dc converter

I have a 40V to 400V 500W bidirectional DC-DC converter as shown the image below. I have trouble designing the gate drive circuit of the switches at the top of the circuit ( I mean S1 to S4 ) because all four switches are high side switches and I do…
Amir
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IR2101 high side internal structure

Can anyone explain to me what is the logic behind high side RS flip flop, pulse generator, pulse filter from IR2101 internal structure picture ? The input circuit is easy to understand and also the low side circuit.
pantarhei
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