Stable voltage converter with multiple pulse width modulated channels
AssigneeWinbond Electronics Corp.
InventorsAn-Tung Chen, Yung-Peng Hwang
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Abstract
A stable voltage converter is described. The stable voltage converter has an error amplifier, a plurality of subtraction circuits, a plurality of converter channels, and a plurality of current sensors. The error amplifier compares a reference voltage and an average output voltage to generate an error signal for stabilizing the output voltage of the converter. The subtraction circuits input the error signal and channel current signals generated by the current sensors, and then output modified error signals for controlling the converter channels to adequately output direct current power outputs.
Claims11
A stable voltage converter with multiple pulse width modulated channels, the converter comprising:
- a converter output having an average output voltage signal of the converter;
- an error amplifier inputting a reference voltage signal and the average output voltage signal, wherein said error amplifier compares the reference voltage signal and the average output voltage signal to generate an error signal;
- a plurality of subtraction circuits in parallel coupled with the error amplifier, wherein each of the subtraction circuits receives the error signal and a channel current signal, and generates a modified error signal;
- a plurality of converter channels, each of the converter channels coupled with one of the subtraction circuits, wherein each of the plurality of converter channels inputs the modified error signal and generates a direct current power output;
- and
- a plurality of current sensors, each of the current sensors coupled with one of the converter channel, wherein each of the current sensors measures the direct current power output and feeds back the channel current signal to the subtraction circuit coupled with the same converter channel.
A stable voltage converter with multiple pulse width modulated channels, the converter comprising:
- a converter output having an average output voltage signal of the converter;
- an error amplifier inputting a reference voltage signal and the average output voltage signal, wherein said error amplifier compares the reference voltage signal and the average output voltage signal to generate an error signal;
- a plurality of subtraction circuits in parallel coupled with the error amplifier, wherein each of the subtraction circuits receives the error signal and a channel current signal, and generates a modified error signal;
- a plurality of converter channels, each of the converter channels coupled with one of the subtraction circuits, wherein each of the plurality of converter channels comprises:
- a pulse width modulator inputting a ramp signal, said modified error signal and generating a pulse width modulator signal;
- a power switch coupled with said pulse width modulator, said power switch inputting the pulse width modulator signal and generating a pulse power output based on the pulse width modulator signal;
- and
- a filter coupled with said power switch and filtering said pulse power to generate the direct current power output;
- and
- a plurality of current sensors, each of the current sensors coupled with one of the converter channels, wherein each of the current sensors measures the direct current power output and feeds back the channel current signal to the subtraction circuit coupled with the same converter channel.
Dependencies are inferred from the claim text.