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what does Max Vce=600v as mentioned in datasheet of ISO5500 mean?

NITESH JHA
Prodigy 50 points
Other Parts Discussed in Thread: ISO5452

I have STW40N95K53N-channel 950 V, 0.110 Ohm ,38 A ,MDmesh K5 Power MOSFET . But my Vds is not exceeding 600V can I use ISO5500 as my gate driver or should go for ISO5452 or some higher Vce rating gate driver

  • 0
    TI__Intellectual 2900 points
    Hi Nitesh,

    What is the supply voltage is on the secondary side of gate driver?
    Can you also please provide some more details regarding your design. Is it an inverter design?

    Regards,
    Anand Reghunathan
  • 0 in reply to Anand Reghunathan
    Prodigy 50 points

    Thanks Anand Reghunathan
    yes its a three phase inverter design and i want to generate a gate pulse from DSP(TMS28335) 0-3.3V. I m supplying secondary side with +15V and -15 V DC generated from flyback on board i m attaching schematic of my circuit .
    I m also attaching Gate Driver output Vgs which i got without putting any load across Drain and source of my IGBT (1MBH50D) .Is there a problem in my gate driver circuit or should i test by connecting load.

    Note:i have not used +15V and -15V zener in my board till now and used 10uF capacitor instead of 4.7uF for c02 different from as shown in schematic

    Edit: This is the VGS after adding +-15V  zener across Gate and source should i go on adding snubber and Load across switch now

  • 0 in reply to NITESH JHA
    Prodigy 50 points
    It was a problem due to snubber circuit of flyback made to supply secondary of ISO5500 , It worked finally but without load till now