Electrical circuit for delivering power to consumer electronic devices

An electrical circuit for providing electrical power for use in powering electronic devices, comprising:

• a power converter circuit electrically coupled to an electrical power source for receiving alternating current (AC) input power from the electrical source and delivering direct current (DC) output power to an electronic device, the power converter circuit including a transformer and a first switching device coupled to a primary side of the transformer for delivering power from the electrical power source to the transformer;
• a Hall Effect sensor coupled to the transformer for sensing a magnetic field being generated by the transformer;
• and
• a controller coupled to the Hall Effect sensor and the switching device, the controller configured to receive the sensed magnetic field from the Hall Effect sensor and transmit a control signal to the switching device to adjust the voltage level of power being delivered to the electronic device, the control signal being determined as a function of the sensed magnetic field.

An electrical circuit for providing electrical power for use in charging electronic devices, comprising:

• a rectifier circuit coupled to an electrical source for receiving the AC input power from the electrical source and converting the AC input power to DC input power
• a quasi-resonant circuit coupled to rectifier circuit, the quasi-resonant circuit including a first switching device, a diode, an inductor, and a capacitor;
• a power converter circuit coupled to the quasi-resonant circuit for receiving the DC input power signal from the quasi-resonant circuit and delivering a DC output power having a reduced voltage level, the power converter circuit including a transformer and a second switching device coupled to a primary side of the transformer for delivering power from quasi-resonant circuit to the transformer primary side of the transformer;
• a synchronous rectifier circuit coupled to the transformer, the synchronous rectifier circuit including a synchronous switching device coupled to a secondary side of the transformer and a synchronous rectifier controller coupled to the synchronous switching device for transmitting a switch control signal to the synchronous switching device to modify the output power being delivered to the electronic device;
• a voltage sensor coupled to the primary side of the transformer for sensing a voltage level of power being generated by the transformer;
• and
• a controller coupled to the voltage sensor and the switching device, the controller configured to receive the sensed voltage level from the voltage sensor and transmit control signals to the first and the second switching devices to adjust the voltage level of power being delivered to the electronic device.