Dynamic power management circuit for controlling supply power of current type digital-to-analog converter

Abstract

The invention relates to a dynamic power management circuit for controlling the supply power of a current type digital-to-analog converter. The circuit is set as follows: under the condition that a boost type DC-DC circuit is used as a power supply of a current type digital-to-analog converter circuit, whether the DC-DC conversion circuit has the capability of driving a current type output stage circuit or not is judged through comparison by using a comparator, the boost process of the DC-DC circuit is controlled, and the purpose of self-adaptive adjustment of the power of the power supply is achieved. Under the condition of driving light load, the output voltage of the boost DC-DC circuit can be adjusted by using the circuit design method provided by the invention, the amplitude of the output voltage for driving the digital-to-analog converter circuit is the lowest, and the characteristic that the power supply voltage can be automatically adjusted according to output requirements ensures that the digital-to-analog converter circuit has the advantage of low power consumption.

Description

technical field [0001] The invention relates to the field of integrated circuits, and is a dynamic power management circuit for controlling the power supply of a current-mode digital-to-analog converter, which is mainly used in the power management circuit of the current-mode digital-to-analog converter. Background technique [0002] Current-mode digital-to-analog converters have been widely used in industrial process control, remote management equipment, programmable current sources, remote data converters and monitors, etc. Due to the deepening of the research on the structure of the digital-to-analog converter and the design requirements of various research institutions, the number of channels assigned to the digital-to-analog converter circuit is increasing. When the circuit structure of a single channel produces a part of the power loss during the design process, the overall power consumption of the circuit increases exponentially as the number of channels increases, ma...

AI Technical Summary

Problems solved by technology

At the same time, if the same power supply is used to power the digital-to-analog converter circuit to drive light loads, the divided voltage value of the power supply voltage actually applied to the load will only occupy a small part, and the power supply voltage will generate great waste.

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