Checking if IGBT High Side Driver is Working

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Discussion Overview

The discussion revolves around checking the functionality of an IGBT high-side driver. Participants explore methods for verifying whether the driver is operational, including voltage measurements and circuit details. The conversation includes technical specifications and component values relevant to the setup.

Discussion Character

  • Technical explanation, Experimental/applied, Debate/contested

Main Points Raised

  • One participant asks how to check if the IGBT high-side driver is working.
  • Another participant suggests measuring the voltage between the positive supply rail and the gate drive using an isolated multimeter and mentions the potential need for an oscilloscope to observe switching waveforms.
  • A participant provides a link to the driver datasheet and specifies the values of the filter and charging pump capacitors, along with the supply voltage.
  • There is a recommendation to use small ceramic capacitors in parallel with the electrolytic capacitors to handle high-frequency noise from the IGBT.
  • One participant requests additional information, including the circuit diagram and part numbers for the components, indicating that the current information is insufficient.

Areas of Agreement / Disagreement

Participants express varying levels of agreement on the methods to check the driver, but there is no consensus on the specific circuit details or the adequacy of the provided information.

Contextual Notes

The discussion lacks a complete circuit diagram and specific part numbers for the IGBT, which may limit the ability to provide tailored advice. There are also assumptions regarding the types of capacitors used that have not been explicitly confirmed.

Who May Find This Useful

Individuals working with IGBT drivers, those troubleshooting high-side driver circuits, and participants interested in power electronics may find this discussion relevant.

billy fok
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currently I'm using IGBT High Side driver. May i know how to check is the driver working or not working??
 
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Exactly what voltages are you using ? Is it dangerous HV ?
Measure the voltage between the +ve supply rail and the gate drive with an isolated multimeter.
You might need to use an oscilloscope to see the switching waveforms.
Can you post your circuit with component values and the part numbers of the high-side driver and the IGBT.
 
Baluncore said:
Exactly what voltages are you using ? Is it dangerous HV ?
Measure the voltage between the +ve supply rail and the gate drive with an isolated multimeter.
You might need to use an oscilloscope to see the switching waveforms.
Can you post your circuit with component values and the part numbers of the high-side driver and the IGBT.
hi, thanks for the quick reply.. this is the driver that i use (http://www.rcscomponents.kiev.ua/datasheets/irs21850spbf.pdf)
for the filter capacitor value is 100 microF, and the charging pump capacitor 10 microF.
i supply 15V to Vcc... hope you are able to help me.
 

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billy fok said:
hi, thanks for the quick reply.. this is the driver that i use (http://www.rcscomponents.kiev.ua/datasheets/irs21850spbf.pdf)
for the filter capacitor value is 100 microF, and the charging pump capacitor 10 microF.
i supply 15V to Vcc... hope you are able to help me.

I assume that your capacitors (10μF, 100μF) are electrolytic capacitors. Remember to add small (ceramic) capacitors in parallel (100nF - 200nF) close to the driver) as the noise from the IGBT includes high frequency harmonics. An electrolytic capacitor is not fit for these, as it has some reactance contained.
 
Baluncore said:
Can you post your circuit with component values and the part numbers of the high-side driver and the IGBT.
Insufficient information. No circuit, no IGBT part number...
Symptoms would also be helpful.
 

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