Multilevel voltage supply device and multilevel voltage supply method

Abstract

To provide a compact and highly power-efficient multilevel voltage supply device and multilevel voltage supply method. [Solution] The multilevel voltage supply device comprises: a single-inductor multi-output DC / DC converter that converts and generates an input power supply voltage into multiple supply voltages with different voltages for average power tracking; a multilevel voltage selection means that dynamically and discretely selects one load supply voltage from the multiple generated voltages as the supply voltage for average power tracking; and an exclusive single feedback control means that uniquely extracts only the voltage level of the one supply voltage dynamically and discretely selected by the multilevel voltage selection means, and feeds it back to the single-inductor multi-output DC / DC converter to configure a single feedback loop of the one selected load supply voltage, thereby controlling the output stabilization of the single-inductor multi-output DC / DC converter.

Claims

1. A single-inductor multi-output DC / DC converter means that converts the input power supply voltage to generate multiple supply voltages with different voltages for average power tracking, A multilevel voltage selection means dynamically and discretely selects one load supply voltage from the plurality of generated voltages as the supply voltage for average power tracking, An exclusive single feedback control means that uniquely extracts only the voltage level of one load supply voltage dynamically and discretely selected by the multi-level voltage selection means, and feeds it back to the single-inductor multi-output DC / DC converter to configure a single feedback loop of the selected load supply voltage, thereby enabling stabilization control of the output voltage in the single-inductor multi-output DC / DC converter. A multilevel voltage supply device equipped with the following features.

2. The exclusive single feedback control means, Divider circuits are provided for each of the multiple generated voltages, which divide the generated voltage using voltage divider resistors; Voltage follower circuits provided for multiple generated voltages; an anode OR circuit that wires OR the outputs of each voltage follower circuit using diodes provided at each output of each voltage follower circuit; and, A differential amplifier that compares the exclusive single feedback voltage signal of the anode OR circuit output with a reference voltage and outputs an error amplified output voltage as a single feedback loop signal, is included. The multilevel voltage supply device according to claim 1.

3. The voltage divider resistors of each divider circuit, provided at the input of multiple voltage follower circuits, are set so that all outputs produce the same divided voltage output for each rated output voltage during rated (100% load) operation. The multilevel voltage supply device according to claim 2.

4. A single-inductor multi-output DC / DC converter means, An energy (current) regeneration circuit comprising an energy storage inductor, an energy (current) regeneration coupling inductor tightly coupled to the energy storage inductor, and a commutation (freewheeling) diode connected to the current regeneration coupling inductor; An isolation transformer having a single primary winding and multiple secondary windings; A push-pull inverter with a pair of switching transistors drives the primary winding of the isolation transformer; Multiple rectifier circuits and multiple output capacitors are provided on each of the multiple secondary windings, which perform rectification and smoothing to generate multiple DC voltages; and, The system includes a sawtooth wave oscillator and a pulse width modulation control circuit that compares the sawtooth wave output voltage output from the sawtooth wave oscillator with the error amplified output voltage as a single feedback loop signal from a differential amplifier, and controls the duty cycle of pulse width modulation for switching control. The multilevel voltage supply device according to claim 2 or 3.

5. The multilevel voltage selection means outputs a supply voltage for average power tracking to the power amplifier. A multilevel voltage supply device according to any one of claims 1 to 3.

6. The multilevel voltage selection means is To address overcurrents associated with charging and discharging the input bulk capacitor of the power amplifier, A first current limiting circuit is formed by connecting a first current limiting resistor, a first bipolar transistor, and a first Schottky barrier diode to a forward FET switch. The reverse-direction FET switch is connected to a second current-limiting resistor and a second bipolar transistor. The multilevel switcher includes a second current limiting circuit connected to a second Schottky barrier diode, The multilevel voltage supply device according to claim 5.

7. A single-inductor multi-output DC / DC converter converts and generates multiple supply voltages of different levels for average power tracking from the input power supply voltage. The multilevel voltage selection means dynamically and discretely selects one load supply voltage from among multiple generated voltages as the supply voltage for average power tracking. A multilevel voltage supply method in which an exclusive single feedback control means uniquely extracts only the voltage level of one supply voltage dynamically and discretely selected by a multilevel voltage selection means and feeds it back to a single inductor multi-output DC / DC converter, thereby configuring a single feedback loop of the selected load supply voltage and thereby stabilizing the output voltage of the single inductor multi-output DC / DC converter.

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