Charge pump step-down constant-current circuit controlled by DSP and control method of charge pump step-down constant-current circuit

By using DSP control and PID algorithm in the charge pump step-down circuit, combined with the current detection and feedback loop module, high-precision control of the output current is achieved, solving the problem of large current fluctuations in traditional charge pump circuits when load changes, and improving the stability and energy efficiency of the system.

CN119727374AActive Publication Date: 2025-03-28YUEYING LIGHTING TECHNOLOGY (GUANGDONG) CO LTD
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Patent Information

Application Number
CN202411993192.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-03-28
Estimated Expiration
2044-12-31

AI Technical Summary

Technical Problem

Traditional charge pump step-down circuits lack precise current control capabilities, especially when the output current fluctuates greatly when the load changes, and rely on complex feedback circuits and analog controllers, which increases system cost and design complexity.

Method used

The charge pump voltage-down constant current circuit controlled by DSP includes a charge pump module, a current detection module, a feedback loop module and a DSP control module. Through the real-time calculation of DSP and the PID control algorithm, the closed-loop control of the output current is realized, and the protection mechanism and soft start function are included.

Benefits of technology

It realizes high-precision constant current output, which can maintain current and voltage stability when load fluctuates. The adaptive frequency control strategy optimizes energy conversion efficiency, reduces energy consumption, and improves the flexibility and scalability of the system.

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Abstract

The invention discloses a charge pump step-down constant current circuit adopting DSP control and a control method thereof, the charge pump step-down constant current circuit comprises a charge pump module, a current detection module, a feedback loop module and a DSP control module, the current detection module comprises a charging current detection module, a voltage detection module and a driving module, the feedback loop module comprises a voltage divider, a current detection resistor, a comparator and an error amplifier. Through the current detection module, the feedback loop module, the DSP control module, the protection mechanism module and the soft start function, the charge pump step-down constant current circuit controlled by the DSP is realized, the charge pump step-down constant current circuit has high-precision constant current output, and through real-time calculation and adjustment of the DSP, high-precision control of output current and voltage is realized. The current and the voltage can be kept stable even when the load fluctuates, the energy conversion efficiency is optimized through the self-adaptive frequency control strategy, the energy consumption is reduced, and meanwhile the flexibility and the expandability are improved.
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