Abstract: A cascaded synchronous bootstrap supply circuit with reduced voltage drop between the cascaded bootstrap capacitors by replacing bootstrap diodes with gallium nitride (GaN) transistors. GaN transistors have a much lower forward voltage drop than diodes, thus providing a cascaded gate driver bootstrap supply circuit with a reduced drop in bootstrap capacitor voltage, which is particularly important as the number of levels increases.

Abstract: A fully integrated GaN driver comprising a digital logic signal inverter, a level shifter circuit, a UVLO circuit, an output buffer stage, and (optionally) a FET to be driven, all integrated in a single package. The level shifter circuit converts a ground reference 0-5 V digital signal at the input to a 0-10 V digital signal at the output. The output drive circuitry includes a high side GaN FET that is inverted compared to the low side GaN FET. The inverted high side GaN FET allows switch operation, rather than a source follower topology, thus providing a digital voltage to control the main FET being driven by the circuit.

Abstract: A cascaded synchronous bootstrap supply circuit with reduced voltage drop between the cascaded bootstrap capacitors by replacing bootstrap diodes with gallium nitride (GaN) transistors. GaN transistors have a much lower forward voltage drop than diodes, thus providing a cascaded gate driver bootstrap supply circuit with a reduced drop in bootstrap capacitor voltage, which is particularly important as the number of levels increases.

Abstract: In embodiments, apparatuses, methods and systems associated with battery charging are disclosed herein. In various embodiments, a reference current selector may receive a battery voltage sense input and output a reference current level signal, a power point check detector may receive a power supply sense input and output a power point check signal, and a controller coupled to the reference current selector and the power point check detector may receive a battery current sense input and switch a control output based at least in part on the reference current level signal, the battery current sense input, and the power point check signal. Other embodiments may be described and/or claimed.

Abstract: A fully integrated GaN driver comprising a digital logic signal inverter, a level shifter circuit, a UVLO circuit, an output buffer stage, and (optionally) a FET to be driven, all integrated in a single package. The level shifter circuit converts a ground reference 0-5 V digital signal at the input to a 0-10 V digital signal at the output. The output drive circuitry includes a high side GaN FET that is inverted compared to the low side GaN FET. The inverted high side GaN FET allows switch operation, rather than a source follower topology, thus providing a digital voltage to control the main FET being driven by the circuit.

Abstract: In embodiments, apparatuses, methods and systems associated with battery charging are disclosed herein. In various embodiments, a reference current selector may receive a battery voltage sense input and output a reference current level signal, a power point check detector may receive a power supply sense input and output a power point check signal, and a controller coupled to the reference current selector and the power point check detector may receive a battery current sense input and switch a control output based at least in part on the reference current level signal, the battery current sense input, and the power point check signal. Other embodiments may be described and/or claimed.