Power Converting Circuit Precision Control via Feedback
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Solution Overview
Problem
Power converting circuits face challenges in precisely providing a small output signal due to the converting ratio and manufacturing variations, which affect power consumption efficiency in electronic products.
Innovation Solution
A power converting circuit design incorporating an upper gate switch, a comparator circuit, a delay circuit, and a pulse width modulation signal generating circuit, which adjusts the conduction time of the upper gate switch based on a reference signal and output signal comparison to achieve precise output signal generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the power converting circuit is configured to provide less output current for reducing power consumption, then power consumption is reduced, but the output signal precision deteriorates due to converting ratio and manufacturing variations
Solution Approach 1:
The patent implements a feedback control mechanism where the output signal is continuously compared with a reference signal through a comparator circuit. The comparison result feeds back to adjust the conduction time of the upper gate switch, ensuring that the output signal precisely matches the reference signal regardless of manufacturing variations or load conditions. This closed-loop feedback enables precise small signal output while maintaining low power consumption.
Solution Approach 2:
The patent dynamically adjusts the conduction time of the upper gate switch based on the comparison between output signal and reference signal. Instead of using fixed conduction times, the system adaptively modifies the conduction duration to compensate for manufacturing variations and maintain precise output control. This dynamic adjustment mechanism allows the circuit to achieve high precision in small signal outputs while operating efficiently at low power consumption levels.
2Measurement precision
If the conduction time of the upper gate switch is extended to compensate for manufacturing variations, then output signal precision improves, but power consumption increases
Solution Approach 1:
The feedback control mechanism continuously monitors the output signal and adjusts the conduction time dynamically. The comparator circuit compares the actual output with the reference signal, and only extends the conduction time when necessary to correct deviations caused by manufacturing variations. This on-demand adjustment prevents unnecessary extended conduction times that would waste power, achieving precision only when needed.
Solution Approach 2:
The patent changes the conduction time parameter dynamically based on the comparison result between output and reference signals. Instead of using a fixed extended conduction time for all operating conditions, the system adjusts this parameter adaptively - extending it only when the comparison indicates a deviation that needs correction. This parameter modulation achieves precision while minimizing power consumption by avoiding unnecessary extended conduction.
Data Source
AI summary
A power converting circuit includes an upper gate switch, a transistor, a current source circuit, a comparator circuit, a delay circuit, and a pulse width modulation signal generating circuit. The transistor and the current source circuit provide a reference signal. The comparator circuit generates a comparing signal according to the reference signal and an output signal provided by the upper gate switch. The delay circuit generates a delay signal according to the comparing signal and a clock signal. The pulse width modulation signal generating circuit generates a control signal for the upper gate switch according to the delay signal and the clock signal for configuring the conduction status of the upper gate switch. The power converting circuit adjusts the conduction time of the upper gate switch according to the reference signal and the output signal.