Operating frequency is 125Khz, I will be building a circuit that's capable of providing 5W to a load. For the (receiver) Tx, arduino (5V) will provide a pwm to a mosfet driver which should then boast the gate voltage up to 10V that will be connected to 2 n-channel mosfet. N/b the driver will provide inverted signals.
The output will be connected to a resonance circuit which will be matched for the Rx(receiver circuit) which comprises resonance circuit, a full wave rectifier, a filter, liner regulator (to step down voltage to 5V) and finally connected to my load(Phone) Hence, Expected output is 5V and up to 1A = 5W to comfortably charge the phone.
I have been using fqa55n25 and irf2103 mosfet and mosfet driver and have been getting up 50V peak-to-peak but very LOW current. The output current on driver i'm measuring is 80mA on the highside, and 40mA on the low side. Duty cycle is 50%. I think the descrepancy in the current maybe as a result of a 60% to 40% duty cycle from from the driver i suppose to ensure there's no overshoot. based on the Ig = Qg/ton (values from mosfet datasheet) current required to charge cap on mosfet is 1.4A current me if i'm wrong hence, 80mA wouldn't cut it.
Lately, i realized that Gte charge, rise times and fall times should be considered when selecting mosfets. Hence, I need help figuring out a matching mosfet and it's driver. Help me consider the appropriate ic that will help generate up to 1.5A.
The output will be connected to a resonance circuit which will be matched for the Rx(receiver circuit) which comprises resonance circuit, a full wave rectifier, a filter, liner regulator (to step down voltage to 5V) and finally connected to my load(Phone) Hence, Expected output is 5V and up to 1A = 5W to comfortably charge the phone.
I have been using fqa55n25 and irf2103 mosfet and mosfet driver and have been getting up 50V peak-to-peak but very LOW current. The output current on driver i'm measuring is 80mA on the highside, and 40mA on the low side. Duty cycle is 50%. I think the descrepancy in the current maybe as a result of a 60% to 40% duty cycle from from the driver i suppose to ensure there's no overshoot. based on the Ig = Qg/ton (values from mosfet datasheet) current required to charge cap on mosfet is 1.4A current me if i'm wrong hence, 80mA wouldn't cut it.
Lately, i realized that Gte charge, rise times and fall times should be considered when selecting mosfets. Hence, I need help figuring out a matching mosfet and it's driver. Help me consider the appropriate ic that will help generate up to 1.5A.
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