Low-Voltage Feedback Circuit for Efficient Boost Power Supplies
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Solution Overview
Problem
Existing power supply devices with boost circuits face high power consumption due to feedback circuits, which reduces efficiency.
Innovation Solution
A feedback circuit with a feedback voltage generation circuit, base voltage generation circuit, and compensation signal generation circuit that uses a lower feedback voltage derived from a bias voltage, reducing power consumption by limiting the feedback voltage to be lower than the bias voltage, and adjusting the compensation signal accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the feedback circuit directly monitors the output voltage in a boost circuit, then the output voltage can be stabilized, but the power consumption of the feedback circuit becomes high
Solution Approach 1:
The patent introduces an intermediary feedback voltage generation circuit that converts the high output voltage to a lower feedback voltage through a voltage conversion mechanism. This intermediary circuit acts as a mediator between the high-voltage output and the feedback control circuit, allowing the feedback function to be maintained while operating at lower voltage levels that consume less power.
Solution Approach 2:
The patent changes the voltage parameter of the feedback signal by generating a feedback voltage that is lower than the bias voltage through the feedback voltage generation circuit. This parameter transformation allows the feedback circuit to operate with reduced voltage levels, thereby reducing power consumption while still providing effective voltage regulation control.
2Measurement precision
If the feedback voltage is derived directly from the high output voltage, then accurate voltage monitoring is achieved, but the power consumption increases
Solution Approach 1:
The feedback voltage generation circuit serves as an intermediary that accurately transforms the output voltage information into a lower voltage feedback signal. This intermediary mechanism preserves the measurement accuracy needed for voltage monitoring while operating at energy-efficient voltage levels.
Solution Approach 2:
The patent transforms the voltage parameter from high output voltage to lower feedback voltage through the feedback voltage generation circuit. This parameter change enables the feedback circuit to maintain monitoring accuracy while reducing energy consumption by operating at lower voltage levels.
Data Source
AI summary
A feedback circuit is used for a power supply device. The power supply device includes a primary side circuit and a secondary side circuit. The feedback circuit includes a feedback voltage generation circuit, a base voltage generation circuit, and a compensation signal generation circuit. The feedback voltage generation circuit is electrically connected to the secondary side circuit. The feedback voltage generation circuit generates a feedback voltage according to a bias voltage and an output voltage of the power supply device. The base voltage generation circuit generates a base voltage according to the feedback voltage. The compensation signal generation circuit generates a compensation signal according to the feedback voltage and the base voltage and provides the compensation signal to a controller in the primary side circuit. A voltage value of the feedback voltage is lower than a voltage value of the bias voltage.