Efficient power regulation for class-E amplifiers
A power converter device and method are provided. The power converter device includes an input power source and an input inductor configured for coupling a power of the input power source to the device. A switch is configured to regulate a power of the input power source through the input inductor. A shunting diode is coupled between the switch and the input inductor. A resonant load is coupled with the input inductor. A switching element is coupled with the input inductor and the resonant load and configured to operate at a fixed frequency. The power converter device also includes a control circuit for modulating a frequency of the switch and a driving module for driving the switching element at the fixed frequency. In an exemplary embodiment, the power converter device is a Class-E amplifier. The fixed frequency is a frequency equal to a resonant frequency of the resonant load. In one embodiment, the power converter device is configured as an integrated circuit device.
1. A differential power converter device comprising:
an input power source;
a first and a second input inductor configured for coupling a power of the input power source;
a switch coupled between the input power source and the first and the second input inductors, wherein the switch is configured to regulate a power of the input power source through the first and the second input inductor;
a shunting diode configured for shunting the power of the first and the second input inductor when the switch is open;
a resonant load coupled with the first and the second input inductor comprising a first capacitor, a second capacitor, a third capacitor, a series inductor and a load circuit; and
a first and a second switching element coupled with the first and the second input inductor, respectively, and coupled with the resonant load, the first and the second switching element configured to operate at a fixed frequency.
2. The device of claim 1 , further comprising a control circuit for modulating a frequency of the switch.
3. The device of claim 1 , further comprising a driving module for driving the first and the second switching element at the fixed frequency.
4. The device of claim 1 , wherein the differential power converter device comprises a Class-E amplifier.
5. The device of claim 1 , wherein the input power source comprises a DC voltage signal.
6. The device of claim 5 , wherein the DC voltage signal comprises a value approximately equal to 20 VDC.
7. The device of claim 1 , wherein the shunting diode is coupled between the switch and the first and the second input inductor.
8. The device of claim 1 , wherein the fixed frequency comprises a frequency equal to a resonant frequency of the resonant load.
9. The device of claim 1 , wherein the device is configured as an integrated circuit device.
10. The device of claim 1 , wherein the switch comprises a MOSFET device.
11. The device of claim 1 , wherein the shunting diode comprises instead a MOSFET device and the switch comprises a complimentary MOSFET device.
12. The device of claim 1 , wherein the switch is continuously closed and operated as a fuse-link.