Switching Regulator Transient Response Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Switching regulators controlled by PWM technology exhibit poor transient response and reliability due to load influence, leading to unstable power delivery and increased risk of power failure.
Innovation Solution
A transient response circuit for switching regulators, comprising a voltage reduction module with MOS transistors, acquisition modules, a comparison module, and pulse width modulation modules, which generate control signals based on acquisition, gating, and feedback signals to manage duty cycles and ensure stable power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If PWM control is used in switching regulator, then noise is reduced effectively, but transient response performance deteriorates
Solution Approach 1:
The control system is divided into two independent controllers: a traditional PWM controller for noise reduction and a transient response controller for improving dynamic performance. Each controller operates independently to address specific requirements without interfering with the other, allowing simultaneous optimization of both noise and transient response.
Solution Approach 2:
The patent combines PWM control with transient response control in a unified switching regulator system. The output signals from both controllers are merged to drive the switching transistor, integrating the advantages of both control methods into a single system that achieves both low noise and excellent transient response.
2Device complexity
If PWM control is used in switching regulator, then the circuit structure remains simple, but power delivery stability deteriorates
Solution Approach 1:
The control function is segmented between two controllers: the PWM controller maintains the simple circuit structure while the transient response controller specifically addresses power delivery stability. This segmentation allows the system to achieve enhanced stability without significantly increasing overall circuit complexity.
Solution Approach 2:
The transient response controller implements feedback control by monitoring the output voltage and adjusting the switching duty cycle accordingly. This feedback mechanism quickly responds to load changes and maintains stable power delivery, improving reliability while keeping the circuit structure relatively simple.
3Reliability
If transient response control is added to improve dynamic performance, then transient response improves, but device complexity increases
Solution Approach 1:
The control system is segmented into two specialized controllers, each with a specific function. The transient response controller is added as a separate module with dedicated components (operational amplifier, compensation capacitors, resistors) that work together to improve dynamic performance without requiring complete redesign of the existing PWM control structure.
Solution Approach 2:
The transient response controller is designed to work universally with standard switching regulator topologies. It uses general-purpose components like operational amplifiers and passive elements that can be integrated into various regulator designs, minimizing the increase in device complexity while achieving improved transient response across different applications.
Data Source
AI summary
A switching regulator has a voltage reduction module, a first acquisition module, a second acquisition module, a third acquisition module, a comparison module and a pulse width modulation module, wherein the comparison module compares a superposed signal of a flat-wave signal or a ramp signal and a feedback signal with an acquisition signal, and outputs a comparison signal; the second acquisition module outputs the ramp signal when the acquired output signal is greater than a preset value, otherwise outputs the flat-wave signal; or when the working current obtained from the main circuit is greater than a preset value, a ratio of the feedback signal output from the third acquisition module to the working current of the main circuit is 1, otherwise the ratio is less than 1. The switching regulator has the advantages of excellent transient response, quick response, and high reliability.