Gate Driver ICs Forum Discussions

I want to use 2EDN7434FXTMA1 gate driver for my BMS application.

My gate current is 60A for which I have selected suitable MOSFET but I gate driver IC to turn on/off this MOSFETs.

I want to know if I Can use this gate driver for my application?

I just got confused with the number output current 5A. This output source current is referring to gate current of MOSFET and not the Drain (load) current.

Please correct me if my understanding is wrong?

Thanks in advance

Hi,

Please help me to find longevity for IR2127SPBF/IR2127STRPBF. Also let  me know if this part is going into NRND part soon, please suggest best alternate cost effective part.

Hello,

I have a question RE: the RDYC fault clear input function on the EiceDRIVER™ 1ED34x1Mc12M Enhanced gate drivers. I'm working on a design to replace legacy gate drivers used for an inverter IGBT stack in an H Bridge configuration. The trouble is the existing design does not have easy access to a microcontroller output (without a more significant redesign) to perform the RDYC fault clear input function, and instead only uses 1x pin on the existing microcontroller to report a fault (i.e. similar as FLT_N to detect Desat etc.).

The existing driver will latch in an internal fault state and clear internally after ~30uS (if all fault conditions are removed, gate driving has stopped etc. and the error out/error in pins are tied together). And the 1x output to the microcontroller we do have allows all other inverter functions to be stopped during the fault until reset by the user externally.

My question is, is there a recommended way to handle the RDYC fault clear input function in this scenario? I've noted through testing of the evaluation board and analysing the datasheet the RDYC needs a rising edge to reset. And there doesn't appear to be anyway (that I can see) to bypass or disable this need. 

Kind regards,

Hello,

I bought 48V- battery protection switch with 2ED4820-EM for referring my application of 48V 50~100A.

https://www.infineon.com/dgdl/Infineon-Infineon-R_48V_BATT_SWITCH10-UG-2021-20-v01_00-EN-UserManual-v01_00-EN.pdf?fileId=8ac78c8c7f2a768a017f86d56f66312f

The main role of the switch was short protection, I tried to test performance and function of modules in case of external (load) short.

The module was controlled by Serial CLI and I configured basic setting on the driver. 
Since a target system current is not that high, I set minimum values on the driver and tried to test short circuit protection at the load. 
I've tried started short test by using power supply first 48V, 8.4A current Limit before Li-Ion battery short circuit test.

There was no other circuitaries or eletric parts between the switch and power supply. and Load was open.

As soon as i short output load LD+ to LD-, I saw a little spark and the switch turned off properly.
But as soon as i tried to turn FET on again,  I realized that gate driver doesn't respone to the CLI command (eg. read registers)
(need further investigation but not really able to debug because of huge heat sink)

I thought it would be ok since there were current limit on the power supplier, and even I expected even short current would not that high so the gate is totally capable of handlihg short current. but now I have the module out of the function...

Referring the block diagram of Gate driver, I see the logic is operated by separated 5V from MCU board. so can somebody explain what circumstance could make gate driver logic controler out of function? (or can it be faulty module since i bought one from digikey....)

Hi there,

On your chip, does a persistently asserterted (low) chip-select pin interfere with the state machine's ability to transceive SPI data from a master?

I have the SCS/ pin pulled low in hardware and cannot receive any SPI data from the chip (using an STM32F4 as master).

Thanks,

Alec

Hi,

We used 1EDN7550U in our design to work as a high side switch, the schematic is as the below picture:

After I got the prototype board and did testing, I found 1EDN7550U didn't switch at all, I have tried to pull IN+ to 3.3V high,

it didn't switch, I have tried to input a 3.3V PWM signal to IN+, it didn't switch either, the pin 4 of MOSFET is about 48V,  supply +5V is OK, and I also have tried to connect VDD to a 12V supply, it didn't switch either,  would you tell me what is wrong with the design?

Thanks 

Kelvin

Hi There,

I am using the 6EDL7141 IC in a BLDC design. I intend to use the internally generated 3.3V DVDD to power an MCU on the same board.

My problem is that the IC seems to begin generating the DVDD voltage on power up, but it quickly shuts off. I am not sure if the whole chip is going into shutdown mode, or just the regulator section. After DVDD shuts off with the bus voltage still applied, the IC continues to consume power. The duration of DVDD shutdown appears to be between 200ms and 2 seconds.

Also note that the DVDD ripple at 3.3V is considerable.

I will attach schematic and scope shot of DVDD during power up.

Please note on schematic that all grounds are tied together.

Any help is much appreciated. Thanks,

Alec