Patent ID: 9413263
Filing Date: 2016-08-09
CPC Classification: H02M,H05B

Claim Text:
1. A transformerless power supply configured to limit heat generation at an output transistor, comprising: a power supply input configured to receive power from a time-varying input voltage source; a phase control circuit configured to generate a current control signal, wherein the current control signal commands power to be drawn from the power supply through an output transistor, wherein the current control signal commands the drawn power to have a minimum current when the time-varying input voltage is at a maximum level, and wherein the current control signal commands the drawn power to have a maximum current when the time-varying input voltage is at a minimum level; and a power supply output responsive to the output transistor, wherein the power supply output is configured to output power drawn from the power supply input via the output transistor, wherein the outputted power is at a consistent power level.