Texas Instruments Corporation

Yihan Yao

Wei Zhao

Jianzhang Xie

Yue Wu

Xufeng Wu

Yueming Sun

Aspects of the disclosure provide for a circuit. In some examples, the circuit includes a timing circuit and a state machine circuit. The timing circuit determines a relationship between a duty cycle of a power converter and a threshold value. The state machine circuit is coupled to the timing circuit and includes a plurality of states including a buck state, a boost state, and a buck-boost state. The state machine circuit transitions among the plurality of states according to time domain control and voltage domain control, based at least partially on the determined relationship between the duty cycle and the threshold value, transitions among the states according to the time domain control when the time domain control indicates an exit from the buck-boost state, and transitions among the states according to the voltage domain control when the voltage domain control indicates the exit from a buck-boost state.

Wide switching frequency range switched mode power supply control topology

A system includes an input voltage node configured to provide an input voltage (VIN). The system also includes a load (R) and a switching converter coupled between the input voltage node and the load (R). The switching converter is configured to provide an output voltage (VOUT) to the load (R) based on the input voltage (VIN). The switching converter includes gate driver circuitry and a current mode control circuit coupled to the gate driver circuitry. The current mode control circuit is configured to output control signals to the gate driver circuitry in accordance with different modes of operation, wherein the current mode control circuit is configured to adjust a threshold (I*) used to switch between a discontinuous conduction mode (DCM) and a power save mode (PSM).

Adjustable power save mode threshold for switching converter

An apparatus comprises a voltage supply configured to provide an input voltage, a buck-boost converter coupled to the voltage supply and comprising an inductor, and a buck-boost controller coupled to the power supply and the buck-boost converter. The buck-boost controller comprises a mode controller coupled to the buck-boost converter and a comparator coupled to the mode controller and the buck-boost converter. The comparator is configured to compare an error signal based on an output voltage of the buck boost-converter to an output current of the inductor to produce a control signal. The mode controller is configured to control the output voltage at least in part according to the control signal.

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Shanghai, China

Yihan Yao