Gate Driver ICs Forum Discussions
As for the current sense ISPx/ISNx terminals, I would like to take measures against noise, so please let me know if you have any application notes about this terminal.
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Show LessHello,
Desat threshold voltage on most of the gate drivers for igbt are set at 9v. Is there a reason why it is at 9 v when most of the igbts reach full current capacity at around 2.5 Vce ? . from the data sheet of FS200R07PE4 , for 15 V Vge and 200A Ic the Vce sat is around 2.5v. If i want to the gate driver to cutoff the gate when the collector current is around 400A what should be the desat threshold voltage should i consider
Are there any documents or guidelines to choose the optimal blanking time for desat protection circuit
Thanks
Show Less2EDB9259Y, 2EDB8259F, 2EDR9259X, 2EDR8259X, 2EDR8259H can IGBT be driven with any of these products?
What is the difference between IGBT isolated gate driver and MOSFET isolated gate driver?
When I examine similar products from other companies, almost all of them say that they are suitable for driving isolated gate drivers, IGBT and MOSFET. When I go to the infineon.com gate driver selection page (2 channel isolated gate driver), only 3 appear.
thanks.
Show LessDear Community,
I am currently working on building the test circuit for the 2EDF8275F integrated circuit, as outlined on the first page of its datasheet. I have chosen standard values for capacitors and resistors as follows:
- C_VDDA = C_VDDB = 1uF
- R_g1 = R_g2 = 4 ohms
- Bootstrap diode: 1N4148
- Mosfet: TK42E12N1
- VDDB = 12V
- V_BUS = 30V
However, I am encountering an issue where the output voltage at the V_SW point remains a constant 12.6V without any variation like the expected PWM signal. I am seeking guidance on identifying and rectifying this error in my circuit. Here are my specific questions:
- Could you please help me troubleshoot and identify the potential source of the continuous 12.6V output at V_SW?
- Are there any specific considerations or adjustments I should make with the chosen components in my circuit?
- Additionally, I would like recommendations on verifying the functionality of the 2EDF8275F circuit under these conditions.
Mosfet datasheet: https://www.mouser.cl/datasheet/2/408/TK42E12N1_datasheet_en_20140630-1139969.pdf
2EDF8275F datasheet: https://www.infineon.com/dgdl/Infineon-2EDF8275F-DataSheet-v02_08-EN.pdf?fileId=8ac78c8c7c72fb9a017c73a8b6f0077d
Thank you in advance for your valuable insights and assistance.
Show Less下記ユーザーガイドp.20のFigure 13にてゲート抵抗がHigh側とLow側で1Ω異なっていますが、何か理由はございますでしょうか?
同じくFigure 13を見ると、SiCモジュールのLow側とゲートドライバのCOM間が1Ωで繋がれていますが、
これはそのことと関係しておりますでしょうか?
また別の理由でしたら、そちらについてもご教授いただきたいです。
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Show LessHello, We are looking for an isolated gate driver with 5A peak current rating and we came across your 1ED3461MC12M gate driver. We have a few questions regarding the RDY pin and FAULT pin Does the RDY and FAULT pin have to be connected to the MCU for the gate driver to reset after a fault because we have to make changes to the LV board if the connection to the mcu is required. RDY and FAULT pin acts as both output and input does that mean mcu has to give the input for the gate driver to reset or does it reset without external signal Thank u
Show LessLadies and Gentlemen,
We are using the IR2103SPBF to realise a totem pole stage for ohmic/inductive loads with two N-channel MOSFETs. This is working very well so far. However, we have noticed a behaviour that we can reproduce, which is causing us some concern. The IR2103 "pulls down" the input voltages through the microcontroller or function generator. Both tested simultaneously down to below two volts or lower, as soon as the system is switched off and on again briefly.
If we switch the system voltage off for a few seconds and then on again, the drivers show this behaviour. It appears as if the HIN and /LIN inputs are no longer high-impedance and even load the microcontroller or the function generator. We have documented this behaviour with the help of our scope and would like to show our circuit together with the attached circuit diagram section and ask whether you may know the problem or whether you know whether the behaviour could be remedied by an external circuit => e.g. controlled discharge of all capacitors when switching on/resetting?
Let's switch the entire system off for a longer period > 20 seconds and then switch it on again. The system restarts correctly and the logic levels of the microcontroller and the function generator are not affected.
Here are our boundary conditions:
Vcc = 12 V (buck/boost converter for IR2103 supply)
Vlogic = 3.4 V (microcontroller & all other ICs in the system)
GND same GND potential for all devices
Vtotem_pole = 11.8 V (designed for 9 V to 30 V) Totem pole supply (MOSFETs) => all tests with 11.8 V
Scope:
Channel 1 => yellow => Output Totem-Pole
Channel 2 => green => Input from function generator
Channel 4 => blue => Input from microcontroller
Kind regards
Show LessWhen I used the 1ED010i12-F2 to drive the SiC MOSFET (C3M0075120D), I had a problem with gate current oscillation. The red waveform is shown below, and the higher the bus voltage (buck circuit), the peak oscillation current of the gate also increases. The oscillation current reaches 3A when the bus voltage is 180V (the green waveform of channel 4 is the gate voltage waveform), so I wonder if this is because the gate driver of this IGBT cannot drive the SiC MOSFET. Furthermore, since the theoretical maximum gate current = driving voltage/internal resistance+external resistor = 20/9+6 = 1.3A, this far exceeds the theoretical value, I would like to ask if you understand the reason why this gate current oscillates and exceeds the theoretical value of the current.
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Show LessThe SCDL voltage setting range of the TLE7189f chip is 0.7-2.5v. How is the short circuit protection current actually designed by the chip calculated or how much voltage is recommended? (The drain voltage monitoring for an external MOSFET short circuit detection is activated immediately. The short circuit detection level is analog adjusted via the voltage settings on the SCDL pin. (There is a 1:1 conversion between the voltage applied to the SCDL pin and the drain voltage limit)
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