Texas Instruments Corporation

Ting-Li Hsu

Stefan Herzer

Qiao Yang

A ground reference circuit to generate a ground reference for a voltage reference circuit includes a resistor coupled in series with a transistor via a current mirror. The resistor is coupled between a ground reference terminal of the voltage reference circuit and a ground terminal of a power converter. The transistor control terminal is configured to receive a pulse width modulation (PWM) control signal having a duty cycle similar to a switching element duty cycle of the power converter. The current mirror circuit is coupled between a current terminal of the transistor and the ground reference terminal. A controller configured to control the switching element duty cycle may include the ground reference circuit, along with the voltage reference circuit, and a PWM circuit configured to determine the switching element duty cycle based on a comparison between a reference voltage provided by the voltage reference circuit and the converter output voltage.

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Aachen, Germany

Ting-Li Hsu