Hi FvM,
I will give u a summary of the circuits operation
S1, S3 are high side drivers and PWM signal is applied to these as inputs
S2, S4 are low side drivers
When S1 and S4 conduct motor will run in forward direction
When S3 and S2 conduct motor will run in reverse direction
I am trying to run a motor lets say in forward direction , so the condition at the inputs would be
S1i = PWM signal
S2i = 0V
S3i = 0V
S4i = 5V
Ideally motor should run, For a 12V DC supply and motor load when i give this combination motor runs successfully and i see gates of S1o and S4o are conducting. But when i try with 220V DC supply and motor load with the same input combinations i see S1o and S3o are conducting instead of S1o and S4o. No matter what combination i follow, the high side drivers S1o and S3o are always ON and S2o, S4o are always off. I do not understand why this is happening
PS: S1i is input to high side of Ir2110 and S10 is high side output of Ir2110 and so on
I donot see any Drivers blowing away and the circuit is simple fine.
Regards,
Suresh
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Hi Fvm,
What do you mean by "No obvious problem with the shown driver circuit, except for a missing Vdd bypass capacitor.
Please explain and what is the value i need to have for the vdd bypass capacitor
Regards,
Suresh
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Regards,
Suresh