Hello Everyone,


I am trying to design DC solid state relay circuit using AUIRS21271STR gate driver and AUIRFR4620 mosfet to drive capacitive load such as motor controller. I have created the schematic for the circuit and would like to ask you to verify or suggest improvements on my design.

SSR design requirements:

• maximum load current 10A
  
• load voltage = upto 200V DC
  
• load capacitance 200 uF
  
• input isolation: required
  
• signal voltage: 3.3V
  
• 
  

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Hej.
Jeg er i gang med reparation af en solcelleinverter hvor modulet F3L15R12W2H3 er kortsluttet mellem ben G34 og N.
Derudover er IC kredsen 1ED020I12-FF defekt, sammen med MIC4452YM.
Mit spørgsmål går på, at jeg kun kan finde data på 1ED020I12-F2, som iflg. datablad ikke bruger ben 4.
På printet er der forbindelse til ben 4, så derfor tror jeg ikke at -F2 kan bruges i stedet for -FF , som jeg ikke kan finde datablad og leverandør af.
Kan noget erstatte -FF eller kan den skaffes et sted?

Hey.
I am in the process of repairing a solar cell inverter where the module F3L15R12W2H3 is short-circuited between pins G34 and N.
In addition, the IC circuit 1ED020I12-FF is defective, together with the MIC4452YM.
My question is that I can only find data on 1ED020I12-F2, which according to data sheet does not use pin 4.
On the print there is a connection to pin 4, so therefore I do not think that -F2 can be used instead of -FF, which I can not find data sheet and supplier of.
Can something replace -FF or can it be obtained somewhere? Show Less

Hello, I am a beginner developer using Infineon products for the first time.
A circuit for charge/discharge control was constructed using the AUIR3241S gate driver IC and 80V class MOSFET.
After applying 3.3V logic to Vin, external 12V was applied to VCC, and VGS was fixed with an 18V Zener diode.
However, there is a problem that the FET side does not conduct.
Thank you for your good comments.
Is my circuit configuration wrong?
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Hello friends,

I have little confusion while designing the controller board for mosfets.

I am using 3 x IRS21867S 4A Source/Sink Gate drivers with 6 mosfets (brushless driver). How much current would be needed for this IC's regulator?

12V 1Ampere regulator would be enough? Or should we use 12A (4A x 3) regulators? That peak currents are used by bootstrap capacitor or voltage regulator's bulk capacitors?

For this uncertainty I am usually trying to use highest current output regulators but I guess not much true. What can happen if I use 100mA regulator? At past when I used low current regulators I saw some unhealthy problems at drivers.

Regards Show Less

Hi all,

I have made a 36V 250W BLDC driver using the IR2136 controlled by a dspic33FJ. I have 10 of these designs running in the field with mostly success... Somehow there is a situation the driver doesn't work anymore. If i replace the IR2136 on the board everything works as expected...
The PWM signals are 3.3V and i have te EN input also connected to the dsPic digital output 3.3V.

Meanwhile i found the following in the datasheet for the EN input:

Do i need to operate this EN input as 5V to work properly?



Can anyone please confirm me if this is the case or 3.3v on EN input is fine?
This will help me a lot in finding the issue...

Many thanks in advance! Show Less

I am using the IPP016N08NF2S MOSFET in a synchornous buck converter. I am willing to use the 2ED2183S06F gate driver IC and i am not able to figure out what should be the bootstrap capacitor.

As per the datasheet(https://www.infineon.com/dgdl/Infineon-2ED2183-4-S06F-J-DataSheet-v02_21-EN.pdf?fileId=5546d4626cb27db2016cb8d765b229f7, page 14 ) of the gate driver,


I have confusion regarding the ∆VBS is the maximum allowable voltage drop at the bootstrap capacitor within a switching period, typically 1 V.
But if we use the formula of the ∆VBS ≤ (VCC – VF– VGSmin– VDSon), It is impossible to get the 1V for me.

How to deal with that.
I am supplying around 15V to the gate driver. It must have a maximum duty cycle of 99.99% and switching frequency of 100KHz. Show Less

Hi there,

As topic, where can I find it? I have looked everywhere but only found its brochure. Not even in MyICP's AURIX site. Do I need to apply for it? If so who should I contact?

Thanks for reading, any reply is appreciated. Show Less

Hi!


For the booster IC, the datasheet currently has theta-jA and theta-jC values. Could you share psi-JT for junction to top of case? I need this to estimate worst-case jn. temperature based on our case temperature measurements.

Thanks. Show Less

Hi,
Can you please advise if there is a drop-in alternative from Infineon to Microchip TC4428A?
IRS4428S is not suitable:
The propagation delay is 50ns typ and 95ns max (compared with 30ns typ and 35ns max).
Customer is using 1 driver per power MOSFET in a full bridge application and the deadtime between high-side and low-side power MOSFET can be as low as 30ns. This implies propagation delay variation between two drivers could result in longer than expected dead time (reduced efficiency) or in the other direction shoot through (both high-side and low-side MOSFETs on at the same time). Said another way they are not worried about the 50ns delay time but the variation of this number between parts (variation needs to be much less than 30ns).

There doesn't appear to be a drop-in from the newer Infineon parts.
Trying to use either the 2EDN7523 or 2EDN7524 and make use of the Enable pin to create an inv / non-inv part looks like it will require PCB changes, and the customer uses the TC4428A on multiple projects.

Would be good to hear if you know of any way to implement this without PCB changes.

Thanks,
Sharmalee Show Less

Hello all,

I am currently working with a PCB we have designed as a 3 phase inverter to do FOC control of a BLDC motor, aiming for 15kW (10KHz switching).

I am working through the calculations for the gate resistances but it isnt particularly clear where I obtain the total switching time for Rgon?? I have assumed that this is the sum of tr, tf, td(on) and td(off) from the IGBT datasheet?? (We are using 6x STGW40M120DF3 for the whole thing).

The design incorporates the optional gate resistor for the soft shutdown aswell as the series resistor at Vs and COM, I cant seem to find how these are calculated either? 🙂

The isolated power supply which is powering VDD on the three drivers is 2W, and Im also wondering if this is enough to run the three half-bridges sufficiently.

Any tips/pointers for this IC would be much appreciated.

Thanks all!

EDIT: I have grabbed the values from my spreadsheet to see if they check out:

For the above IGBTs (using 15V for VDD) I have calculated the following for the Rgon and Rgoff gate resistors, Rgon=4.863R (probably use 5R), Rgoff(max)=13.056R (Probably use 12R). I used a figure of 325ns for Tsw based on the above assumption. Show Less