Voltage Regulation System with Variable Clock Frequency
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Solution Overview
Problem
Existing switch voltage regulators cannot adjust the switching frequency of the switch element according to the load condition, leading to increased power loss when the load is under low loading, as the switch element remains in a conducting state.
Innovation Solution
A voltage regulation system that includes a switch power stage circuit, a pulse generator, a comparator, and a clock generator, where the comparator dynamically adjusts the frequency of the clock signal based on the output voltage and reference voltage comparison, and the pulse signal, allowing the switch power stage circuit to adjust the output voltage according to the load condition, thereby reducing power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the switch element remains in a conducting state to maintain voltage output, then the voltage regulation is stable, but the power loss increases under low loading conditions
Solution Approach 1:
The patent implements dynamic switching frequency adjustment by detecting the load current magnitude and automatically modifying the switching frequency accordingly. Under heavy load conditions, the switching frequency is reduced to minimize power loss, while under light load conditions, the frequency is increased to maintain adequate voltage regulation. This dynamic adaptation resolves the contradiction between maintaining stable voltage output and reducing power loss across varying load conditions.
Solution Approach 2:
The patent changes the switching frequency parameter based on load conditions to optimize system performance. By detecting load current and adjusting the switching frequency parameter in real-time, the system achieves both stable voltage regulation and reduced power loss. The parameter change allows the switch element to operate efficiently across different loading scenarios without remaining continuously conducting.
2Ease of operation
If the switching frequency is kept constant, then the control is simple, but the power loss increases when the load is under low loading
Solution Approach 1:
The patent employs a feedback mechanism where the load current is detected and used to automatically adjust the switching frequency. The detection circuit monitors the load condition and provides feedback to the frequency control circuit, which then modifies the switching frequency accordingly. This closed-loop feedback system maintains control simplicity while enabling adaptive power loss reduction, as the adjustment occurs automatically based on real-time load conditions without complex manual intervention.
Solution Approach 2:
The system performs self-adjustment of switching frequency based on its own operational state. The detection circuit monitors the system's load condition and the control circuit automatically modifies the switching frequency without external intervention. This self-service capability maintains ease of operation while reducing power loss, as the system autonomously optimizes its performance based on real-time conditions.
3Stability of the object's composition
If the switch element conducts continuously to maintain output voltage, then the voltage output is steady, but the power loss increases
Solution Approach 1:
The patent replaces continuous conduction with periodic switching action. Instead of keeping the switch element continuously conducting, the system uses periodic pulse-width modulation (PWM) switching to maintain the average output voltage. The switching frequency and duty cycle are dynamically adjusted based on load conditions, allowing the system to maintain steady output voltage through periodic action rather than continuous conduction, thereby significantly reducing power loss in the switch element.
Data Source
AI summary
A voltage regulation system is provided. In the voltage regulation system, a frequency of a clock signal is adjusted and a pulse generator is controlled to output a pulse signal to a switch power stage circuit, to enable the switch power stage circuit to adjust an output voltage and output the adjusted output voltage to the load element. Through the aforementioned configuration, the switch power stage circuit adjusts the output voltage according to the situation of the load element, thus decreasing the power loss of the switch power stage circuit.