Patent ID: 11863055
Assignee: PSEMI CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An auxiliary circuit configured to provide various voltages and/or signals to a converter circuit controller and/or a converter circuit, the auxiliary circuit including:
(a) a first terminal configured to be selectably coupled to a first voltage;
(b) a second terminal configured to be selectably coupled to a second voltage; and
(c) at least one input voltage selector, wherein a selected input voltage selector of the at least one input voltage selector has a first input coupled to the first terminal, a second input coupled to the second terminal of the auxiliary circuit, and an output, wherein the selected input voltage selector includes (1) a first diode and a first resistor coupled in series between the first terminal and the output, and (2) a second diode and a second resistor coupled in series between the second terminal and the output;
wherein the selected input voltage selector is configured to (1) selectively couple the greater of the first voltage or the second voltage to provide power to the auxiliary circuit from the output during a startup phase of the auxiliary circuit, and (2) selectively couple the lesser of the first voltage or the second voltage to provide power to the auxiliary circuit from the output during a steady-state operational phase of the auxiliary circuit while the lesser selected voltage meets or exceeds a specified minimum voltage for the steady-state operational phase.