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Wide switching frequency range switching mode power supply control topology

A technology of operation mode and time domain control, applied in the direction of control/regulation system, conversion of DC power input to DC power output, instruments, etc.

Pending Publication Date: 2020-11-24
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different switching frequencies are suitable for specific application environments of SMPSs, but optimizing an SMPS controller for a wide range of switching frequencies can present challenges

Method used

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  • Wide switching frequency range switching mode power supply control topology
  • Wide switching frequency range switching mode power supply control topology
  • Wide switching frequency range switching mode power supply control topology

Examples

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Embodiment Construction

[0020] In some architectures, such as buck-boost, a switched mode power supply (SMPS) includes or can be coupled to an output / bulk capacitor in parallel with the load. The SMPS controller switches the power transistors to form a circuit configuration that causes the energy storage element to supply the load current to the load and / or output / bulk capacitor to maintain a regulated output voltage (eg, by filtering the switched load current). For example, a power transistor may be coupled to an energy storage inductor via a switching node / terminal. The energy storage inductor is switched between charge and discharge cycles by the SMPS controller to supply the inductor current (e.g., the current through the energy storage inductor) to the load and the output / bulk capacitor to filter the inductor current to maintains a regulated output voltage. In some examples, an SMPS can be configured for operation as a constant current source, with an energy storage element but no output / bulk c...

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PUM

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Abstract

The embodiments of the present invention relate to wide switching frequency range switching mode power supply control topology. Aspects of the disclosure provide for a circuit 300. In some examples, the circuit 300 includes a timing circuit 302 and a state machine circuit 308. 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 thestates 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 thevoltage domain control indicates the exit from a buck-boost state.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 850,775, filed May 21, 2019, and entitled "Buck-Boost DC- DC Converter (Buck-Boost DC-DC Converter with Wide Switching Frequency Range)", and is hereby incorporated herein by reference in its entirety. technical field [0003] Embodiments of the present disclosure relate to power supply technology, and more particularly, to wide switching frequency range switched mode power supply control topologies. Background technique [0004] A switched mode power supply (SMPS) delivers power from an input source to a load by switching one or more power transistors coupled to energy storage elements (such as inductors / transformers and / or capacitors) via switching nodes / terminals, the An energy storage element can be coupled to a load. A power transistor may be included in a power converter that includes or can be coupled to an energy storage element. ...

Claims

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Application Information

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IPC IPC(8): H02M3/158
CPCH02M3/1582
Inventor 解建章赵炜姚易寒吴越
Owner TEXAS INSTR INC