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Questions tagged [shoot-through]

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Is that shoot through in phase leg configuration?

I am doing simulation using phase leg configuration. Anyone know why there is current spike at around 1.1us? (the last subplot). From the plot, is there a shoot through happen? The spike in blue trace ...
User691's user avatar
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3 votes
1 answer
119 views

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 ...
Erch's user avatar
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9 votes
3 answers
3k views

Why can't I get rid of shoot-through in my half-bridge circuit?

I am building a class D amplifer and I have getting shoot-through despite my best efforts to mitigate them using dead-time, miller clamping, and using high V_GS_threshold MOSFETs. Here is the circuit ...
Random Burnout's user avatar
5 votes
2 answers
598 views

Synchronous buck converter using DGD05463 gate driver: High-side gate goes high while low-side is also high --> Shoot-through

I am working on a synchronous buck converter design using the DGD05463 gate driver. The schematic can be seen below (the inductor is 4.7 µH). The input of the driver gets driven by a 400 kHz PWM ...
Fr4nky's user avatar
  • 107
3 votes
4 answers
3k views

Is dead time needed for a MOSFET?

Is it necessary to implement "dead time" (anti-shoot through) for MOSFETs? F=50kHz
arduplay's user avatar
3 votes
3 answers
291 views

Shoot-through inside gate driver ICs

We are driving a piezo transducer array with sub-1 μs pulses at an extremely low duty cycle. A single N-channel power MOSFET drives each transducer. Each power MOSFET transistor has a low side gate ...
jimolson's user avatar
0 votes
2 answers
549 views

High-side gate driver PWM output signal isn't going all the way down to 0 and it's causing shoot through

Over the past week I have been facing this problem where my high-side driver isn't going all the way down to 0 as seen by the simulation below. My low-side driver puts out a good a PWM signal, ...
Mr. Capacitor's user avatar
1 vote
1 answer
72 views

If a motor driver IC has shoot-through protection does the controller need to add deadtime?

I'm designing a motor driver and controller system for an E-Bike, and I'm currently using the IRSM836-084MA. The datasheet mentions that it has "cross-conduction prevention logic", but to my ...
shraiwi's user avatar
  • 21
7 votes
5 answers
2k views

Rail to rail +12/-12 V square wave generation with microcontroller

I need to generate a +/-12 V square wave, +/-0.4 V tolerance is allowed. The purpose is to drive the pilot signal of an electric vehicle level 2 charger, for those curious. EDIT (clarification): what ...
jamarju's user avatar
  • 311
0 votes
1 answer
546 views

Does complementary transistors have shoot throughs?

Here I have 2 push-pull circuits one made from a complementary BJT CPH5524 and the other using also a complementary MOSFET BSL316C. I would like to be able to push and pull at a frequency of about ...
Jake quin's user avatar
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0 votes
1 answer
3k views

How can I calculate the dead time to prevent shoot-through?

From Figure 1 is evident that to get the dead time I must define the values for RC. E.g my resistor is 220 ohms and capacitor is 0.1uF this gives me 22us at 1-time constant, however, when I measure ...
Daniel Bashy's user avatar
1 vote
0 answers
112 views

IGBT excessive Vge

I have a circuit with a PWM signal controlling the gate of an IGBT. It's a dual IGBT module, SKM150GB12. A relay delivers voltage to the collector, 2, and the power is delivered to a battery, Vbat+ on ...
Thomas C.'s user avatar
  • 153
2 votes
0 answers
795 views

BJT h-bridge shoot-through problem

I made an H-bridge using this schematic: Although the circuit mostly works fine, there is noticeable shoot-through.Even with no load at 150-200hz the input voltage drops by a lot.I added dead time of ...
Kostas Sarioglou's user avatar
6 votes
3 answers
1k views

Why there is no shoot-through in CMOS logic gate?

This picture is shown on Wikipedia. From my understanding of shoot-through, I think this circuit will shoot-through every cycle of pulse and destroy itself. Will it shoot through or are there any ...
M lab's user avatar
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0 votes
0 answers
513 views

Shoot through problem in 3-phase BLDC controller circuit

I have designed a 3-phase controller for a BLDC motor. I am checking one side of the bridge with a Pico-scope for shoot through. The wave-forms below are indicating that i am getting shoot through, ...
Daniel Bashy's user avatar
0 votes
2 answers
4k views

How is dead time in a half bridge implemented

I was wondering if dead-time in a bridge design is achieved by the turn-on and turn off resistors as shown below, so that the FETs turn on slower and turn off faster, thus avoiding shoot through. Or ...
Daniel Bashy's user avatar
2 votes
1 answer
2k views

H-Bridge shoot through at high voltage problem - Don't know the cause

I have this H-bridge circuit The circuit is for driving a 180VDC motor, it is built to taking in the High Bus voltage from 169VDC to 340VDC. it works with no problem up to 310VDC. However, at 340VDC, ...
AlexT's user avatar
  • 57
3 votes
3 answers
863 views

MOSFET High Side conducts when low side switches in H bridge circuit

I have designed an H-bridge circuit using IR4110 Mosfets. Q1 and Q4 are OFF, Q2 and Q3 are conducting. Gate of Q1 is left floating. Q2 being high side, its gate is connected to Vcc + 12V. The gate of ...
Winner's user avatar
  • 321
1 vote
1 answer
267 views

Simplifying H-bridge circuit

I am currently trying to build a PWM H-bridge. It has a power line of 12 V and the Arduino Uno provides the PWM. The MOSFETs I have are: IRLZ44S (N-channel) and FQD11P06TM (P-channel). Basically, the ...
Zalo de Molina's user avatar
0 votes
1 answer
2k views

What is miller shoot through voltage (aka cross conduction)?

Im studying mosfets switching characteristics and one thing I happen to come across is the concept of "cross conduction".I searched around the web and couldnt find answer to my question.Kindly read ...
calculusnoob's user avatar
2 votes
1 answer
782 views

Freewheel diodes and shoot-through prevention required on this low-voltage H-bridge?

I have built the following h-bridge: VMOT1 is at logic level (3.3V) FWD and REV are driven by MCU (no PWM in the scope examples given) Q7/Q8 are DMP1045 Q9/Q10 are BSS138 D3/D4 are 4 x 4148 the 2 ...
Genoil's user avatar
  • 258
0 votes
2 answers
354 views

How to prevent spdt shoot through?

I am working on a simple solar system for heating water. The idea is to use sun power and if not enough, use the power grid at night. I have a solar panel and a MPTT boost converter which collects the ...
ivanich's user avatar
1 vote
1 answer
626 views

MOSFET driver IC not supplying enough current

I am designing a class D audio amplifier using an HIP4080A integrated circuit to drive an H-bridge, simulating in Proteus. My problem is that the output pins of the integrated circuit, although rated ...
Andrei's user avatar
  • 13
-1 votes
4 answers
2k views

What H-Bridge principles am I missing in the circuit [closed]

I thought that an H-Bridge was simple enough to put together. So I loaded LTSPICE and made a sqaure wave with 4 voltage sources, 180 degrees out of phase and fed each oposing corer a signal ...
user186519's user avatar
-1 votes
2 answers
2k views

IGBT H-bridge failure

I am using Infineon's IGBT - IKW50N65H5 and IKW50N65F5 for a H-bridge inverter. The DC supply to the inverter is the line supply of 230VAC with KBPC5010's full wave rectification. The bridge was being ...
hp07's user avatar
  • 39
7 votes
2 answers
27k views

Will this simple four n-channel mosfet H-Bridge Circuit work?

This is my H-bridge circuit without considering Back EMF. In the real circuit I would put four fast recovery diode to eliminate the Back EMF.Maybe schottkies? Before I came up with this design , I ...
Frank's user avatar
  • 73
2 votes
0 answers
429 views

Deliberate Shoot-Through in H-bridge for EMI reduction

today I was analysing an H-bridge driver circuit in a commercial product which is used to drive a DC motor (approx 24V/4A) over an unshielded cable with about 1.5m length. When I did a simulation of ...
christoph's user avatar
  • 710
0 votes
3 answers
5k views

Cause of shoot-through in H-bridge

I've designed an H-bridge for a 15A DC motor. Power is applied by plugging in a very high-capacity Lithium battery. Unfortunately, when I plug in the battery, one of the transistors goes pop instantly ...
Dan Laks's user avatar
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3 votes
3 answers
688 views

H-bridge tiny spike?

My high and low side gate measurements to GND show a tiny little shoot through spike. Adding dead time, Zener bypasses over R(g) and from G-S, and TVS diodes does not do anything. The load is 100K and ...
ARMATAV's user avatar
  • 603
2 votes
1 answer
1k views

H-Bridge with Darlington BJTs, static shoot-through

I have built the following H-Bridge with TIP122 and TIP127 Darlington BJTs: It is made from parts I had around, and I plan to use it for currents up to 2A with a VCC of 12V. Note that 1N4937 diodes ...
Cerv's user avatar
  • 384
14 votes
2 answers
12k views

Why doesn't shoot-through occur on totem-pole structure?

I'm designing a totem-pole by BJTs in order to drive a MOSFET. I studied on several online examples and built up my circuit according to what I understood from them. However, there is a detail which ...
hkBattousai's user avatar
  • 14.1k
1 vote
3 answers
848 views

Will this circuit suffer from Shoot-Through? and is there a quick fix?

I'm considering a high-side, low-side driver using the DMG1016UDW COMPLEMENTARY PAIR ENHANCEMENT MODE MOSFET from diodes. The datasheet says The ON voltage is about 0.5V and ON the delays+rises is ...
MandoMando's user avatar
  • 3,262
4 votes
1 answer
3k views

BLDC Motor Driver Losses

That was a pdf when originally uploaded, but am now going to try to zoom in on the sub-circuits. Please let me know if there's a better way to do this. I'm trying to make a PIC-based BLDC motor ...
tarabyte's user avatar
  • 3,152