I'm looking for help on this mosfet drive circuit. The IC is a dual low side driver from IR. I have the Vs pulled up to 12 v. I am switching two IR Mosfets at 40khz. Each drain is connected to one side of a bifilar wound transformer which has the common winding at 115 vdc. This is a 300 watt load as the current measured at the drain is 2.6 amps. The problem is I can get only one mosfet to switch with the load attached. If I remove the load, both FETS switch. The buck boost transformer is connected to a transducer load.
Any ideas why the FETS would not switch with the load attached? I was wondering if I need to increase the Vs supply?
Thanks for your help.
Any ideas why the FETS would not switch with the load attached? I was wondering if I need to increase the Vs supply?
Thanks for your help.
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