External Loop Compensation for Stable BUCK-BOOST Output
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Solution Overview
Problem
Traditional loop compensation apparatuses for BUCK-BOOST power supply chips struggle to meet power supply stability requirements, leading to unstable output ripples and restricting the high-reliability development of storage devices.
Innovation Solution
An external loop compensation apparatus comprising a power detection unit, compensation unit, and MCU that dynamically adjusts between phase and power compensation modes based on the BUCK-BOOST power supply chip's state, using a phase compensation unit and power compensation unit to provide adaptive compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional single loop compensation is used for BUCK-BOOST power supply chip, then device complexity is reduced, but power supply stability deteriorates
Solution Approach 1:
The patent divides the compensation function into two separate loops: inner loop compensation for basic stability and outer loop compensation for enhanced stability. The outer loop compensation apparatus includes a detection unit, processing unit, and execution unit that independently monitor and adjust the power supply output, thereby resolving the contradiction between simple structure and stable performance.
Solution Approach 2:
The patent introduces an intermediary outer loop compensation mechanism that mediates between the inner loop compensation and the power supply output. This outer loop acts as a mediator to detect output abnormalities and adjust compensation parameters, achieving improved stability without excessively increasing overall system complexity.
2Reliability
If outer loop compensation is added to BUCK-BOOST power supply chip, then power supply stability is improved, but device complexity increases
Solution Approach 1:
The outer loop compensation apparatus is designed with multi-functional units that can perform detection, processing, and execution of compensation actions. These units are integrated into the existing power supply system and can adapt to different working conditions, providing universal stability enhancement without proportionally increasing complexity.
Solution Approach 2:
The compensation system implements self-service through automatic detection and adjustment mechanisms. The detection unit continuously monitors output parameters, the processing unit automatically determines compensation needs, and the execution unit applies corrections without external intervention, reducing the operational complexity despite added structural elements.
Data Source
AI summary
The present disclosure discloses an external loop compensation apparatus and a method and system thereof, and a non-transitory readable storage medium. The loop compensation apparatus provided in the present disclosure includes a power detection unit, a compensation unit, and an MCU, wherein the power detection unit acquires a power supply parameter of a BUCK-BOOST power supply chip and then feeds back the power supply parameter to the MCU; according to the power supply parameter and a working state of the BUCK-BOOST power supply chip, the MCU determines that the working mode of the compensation unit is a phase compensation mode or a power compensation mode; and the compensation unit compensates for the BUCK-BOOST power supply chip according to a control signal of the MCU, so as to achieve effective output compensation for each working state of the BUCK-BOOST power supply chip.