Types of Isolated gate drivers | Optical Isolation | Inductive Isolation | Capacitive Isolation
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- Опубліковано 8 лип 2024
- #foolishengineer #MOSFETdriver #IsolatedGatedriver
0:00 Skip Intro
00:26 Types of isolated MOSFET drivers
01:10 Optical isolated driver
03:01 Inductive isolated driver
04:17 Capacitive Isolation
05:43 Drivers Comparison
References:
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Overall, good video. There is an error; UCC23513 is not an optical isolated gate driver. It’s an opto-emulated gate driver that uses capacitive isolation. A true optocoupler gate driver would be a device from Broadcom/Avago (ACPL-W302). Prop delay is much higher for traditional optocoupler gate drivers in the ~700ns range.
Rather than switching frequency, CMTI (common mode transit immunity) is usually a better indication of an isolated gate drivers switching capabilities with respect to noise. Higher switching speeds increase the dV/dt experienced at the switch node. That noise can couple onto the input and cause faults if the noise is too high. A gate driver with higher CMTI rating enables higher switching frequencies. Likely more relevant to MOSFET/SiC applications rather than IGBT applications.
Look forward to more videos
Thank you for your inputs! I'll check
Another issue is that the low side frequently needs to measure the output current and voltage on the high side in order to adjust the modulation for proper power, etc. How does one isolate the current shut and the voltage divider on the high side from the low side ? FYI, some big IGBTs have current shunts built into them. Great video.
I like the Inductive isolation driver.
Tks for the video.
Thank you so much! Please show support to my video with Super thanks and don't forget to subscribe to our channel
Excellent work
Thank you! Cheers!
Any comment on the isolated driver modules that use fibre optics to connect them to the control electronics ? Like Power Integration's 1SP0635V2A0D ?
I buy 20 tlp250 from r china the optocoupler cant drive any hide side switching when I add the boostrap on it work with a very low wattage but as soon as I connected low like a capacitor the optocoupler just stop working and heating up so is it that the tlp250 gate drive can’t driver anything and should only use to isolate?
You missed one. There is a MOSFET/IGBT driver that has a solar cell output. The LED shines on a photovoltaic cell generating a voltage which can be used to turn the gate. The advantage is not requiring an isolated power supply on the load side. Disadvantage is they're only good for on/off apps not high speed switching.
Can you suggest one part that can do what you describe ?
@@EhsanHabib TLP191B APV1121
Very Interesting IC.... Very useful for Small Scale Isolated Gate Driver requirements...... But i think Foolish Engineer didn't mentioned it because its not used most applications..... M
How can we make the gate pin negative 9 volts while the MOSFET stops conducting electricity? Help me make a video thank you.
Excellent presentation of the critical differences in these drivers.
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@@FoolishEngineer Do you do Patreon or similar?
No, not yet
Great video as always, may I ask you, is there only the opto solution when we are talking about DC?
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Can you elaborate?
@@FoolishEngineer He is wondering about transfering very slow-changing or DC signals across an isolator.
Yes, the opto-coupler would be the only one, unless a DC-chopping technique is used.
Always waiting new vdo...😇
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The 1ED3123MC12HXUMA1 requires a power supply on the HV side. Lets say the HV side is 1200V. How do you built a ~15VDC power supply from a 1200V source ? If you power the power supply from the LV side you've lost the isolation !
I would love to watch more about application of transformer base MOSFET driver
Okay!
There are also RF transmitted isolator ICs such as SI86XX model isolators.
Cool! I'll check those
Does one really need these abundant ad- unstopabilities? This way, it's hardly possible to seriously follow up & study your teaching friend. On top of this, depending on who you are, many people get seriously harassed by subliminal messages provided in them. This by first navigating people's thoughts and then play these out in the footages carefully interwoven, including harassment, psychological harassment, threats of imprisonment, extradition, death threaths, torture, to name but a few ... wake up to this please. Thank you for your work. UA-cam is your worst enemy, and one must be aware of this, Benjamin.
Can you please do the application circuits, like show the whole circuit. My project is based on this.
Yeah, sure!
Pls show some real images of parts also if possible
Sometimes subtitles disappears the valuable video content
You can disable subtitles
Switching frequency of 15-20kHz in the case of optoisolators is not accurate. Even it is used for SiC to switch at 100kHz-.
It is an example, we didn't make the comparison of the type of drivers but the individual components for understanding.
@@FoolishEngineer oKay, Thanks. by the great efforts and nice demonstration for beginners to understand the concept.