Undershoot Suppression Circuit for Power Supply Load Transients
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Solution Overview
Problem
Existing power supply circuits require manual adjustment of thresholds and repeated testing to achieve effective load transient response, which is inefficient and lacks automation.
Innovation Solution
An undershoot suppression circuit is introduced, comprising a rising edge determination circuit, a falling edge determination circuit, and a pulse generation circuit. This circuit automatically generates an undershoot suppression pulse based on the difference between the output voltage and a reference voltage, optimizing load transient response without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual threshold adjustment and repeated testing are used to achieve effective load transient response, then the power supply circuit can meet load requirements, but the development efficiency is low and the process is time-consuming
Solution Approach 1:
The undershoot suppression circuit automatically detects output voltage drops and generates suppression pulses without external intervention. The circuit self-adjusts by monitoring the output voltage through the rising edge determination circuit and falling edge determination circuit, eliminating the need for manual threshold adjustment and repeated testing while ensuring reliable load transient response
Solution Approach 2:
The circuit implements feedback control by continuously monitoring the output voltage and comparing it against reference levels. When the output voltage drops below the reference voltage by more than the threshold voltage, the feedback mechanism triggers the pulse generation circuit to produce suppression pulses, automatically adjusting the power stage circuits to maintain stable output without manual intervention
2Reliability
If manual threshold adjustment is performed to optimize load transient response, then the power supply circuit can be tuned, but the device complexity increases due to manual intervention requirements
Solution Approach 1:
The circuit automatically performs the function of threshold adjustment and optimization through its internal rising edge determination circuit and falling edge determination circuit. These circuits continuously monitor output voltage and autonomously generate appropriate suppression pulses, eliminating the need for manual parameter adjustment while maintaining optimal load transient response
Solution Approach 2:
The patent combines multiple functions (voltage monitoring, threshold comparison, pulse generation, and power stage control) into a single integrated undershoot suppression circuit. This merging of functions simplifies the overall system by eliminating separate manual adjustment mechanisms while maintaining comprehensive control over load transient response
Data Source
AI summary
The present disclosure provides a power supply circuit and an undershoot suppression circuit thereof. The undershoot suppression circuit includes a rising edge determination circuit, a falling edge determination circuit and a pulse generation circuit. The rising edge determination circuit detects a difference voltage between an output voltage of the power supply circuit and a reference voltage, and outputs a clock control signal with a first voltage level when the difference voltage is greater than a threshold voltage. The falling edge determination circuit detects the output voltage, and outputs a reset signal with the first voltage level when the output voltage is not smaller than the reference voltage. The pulse generation circuit generates an undershoot suppression pulse according to the clock control signal with the first voltage level and the reset signal with the first voltage level, so that the output voltage approaches the reference voltage.