Infineon Technologies Austria Ag

Po-Jung Chung

Martin Krueger

Pierrick Ausseresse

Nitin Agarwal

Dong Li

Josef Fisch

Tung Yi Yang

A device for controlling a switching mode power supply includes a regulation module, a feedback node, and a resistance module. The regulation module is adapted to cause a switching module to selectively couple, based on an oscillation frequency, a primary side winding of a transformer and a supply to control a voltage, current, or power output at a secondary side winding of the transformer. The feedback node is adapted to receive an indication of a voltage at the secondary side winding of the transformer. The resistance module is adapted to selectively set a pull-up resistance based on a comparison between a time-controlled frequency and a voltage-controlled frequency that is generated based on a voltage at the feedback node, wherein the regulation module is adapted to set the oscillation frequency as the time-controlled frequency or the voltage-controlled frequency.

Adaptive control loop gain for switching mode power supply

A power supply as described herein includes a voltage converter, main controller, and a bias controller. The voltage converter including a primary stage and a secondary stage. The controller is operable to control regulation of an output voltage from the secondary stage based on a received feedback signal. As its name suggests, the output voltage from the secondary stage powers a load. During certain load conditions, the bias controller maintains (via novel biasing) a magnitude of a power supply voltage above a bias threshold value. More specifically, the bias controller is operable to prevent the power supply voltage from falling below the bias threshold value, preventing an under voltage lockout condition such that the controller is able to quickly continue conveyance of sufficient energy from the first stage to the second stage when the load increases a rate of consuming power provided by the output voltage.

Bias control in a voltage converter

A switched mode power supply (SMPS) to output a smoothly rising voltage (V) during startup and still operate efficiently during steady state. A smoothly rising Vthat avoids a negative voltage slope and voltage overshoot may be desirable in some applications. The techniques of this disclosure include an adaptive loading time controlled oscillator (TCO) compensation circuit that adjusts the TCO frequency to linearly regulate the feedback voltage from the half-bridge (V). The TCO compensation circuit adapts to the startup loading and self-adjusts the regulation speed for the handover point between the TCO and the voltage controlled oscillator (VCO).

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Taipei, Taiwan

Po-Jung Chung