A multi-channel dimmable light-off non-afterglow BUCK control circuit
By using a dual relay and N-1 single relay in the BUCK circuit, combined with the control of the optocoupler and transistor, the common anode N-channel dimming is realized, which solves the problems of high cost and low cost performance in the existing technology, and improves the cost performance and competitiveness of the product.
CN119325164BActive Publication Date: 2025-03-21GUANGDONG HUAHAODE ELECTRONIC TECHNOLOGY CO LTD
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Patent Information
- Application Number
- CN202411847588.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2044-12-16
AI Technical Summary
Technical Problem
The existing BUCK circuit with N-channel dimming off without afterglow is controlled by N dual-channel relays, resulting in high product cost and low cost performance.
Method used
A dual relay and N-1 single relay are used to realize the common anode N-channel dimming and shut down the BUCK circuit without afterglow. Through the cooperation of the optocoupler and transistor, the switching state of the relay is controlled to realize the dimming and shutdown function of the BUCK circuit.
Benefits of technology
It effectively reduces product costs, improves product cost performance and market competitiveness, and realizes the dimming and shutdown function of the common anode N-channel.
✦ Generated by Eureka AI based on patent content.
Abstract
A multi-channel dimmable light-off non-afterglow BUCK control circuit comprises a first output end, wherein the positive and negative electrodes of the first output end are respectively connected to the two endpoints of one end of a conduction end of a dual-channel relay K1, the two endpoints of the other end of the conduction end of the dual-channel relay K1 are commonly connected and connected to the drain of a MOS tube Q1, the source of the MOS tube Q1 is grounded, and the gate is connected to the control end of a main control unit U1; further comprising an optical coupler U3, wherein the positive electrode of the light-emitting end is connected to a control signal SW1 through a resistor R15, the negative electrode is grounded, the collector is connected to a voltage VDD, the emitter is grounded, the emitter is also connected to the base of a triode Q3, the collector of the triode Q3 is connected to the voltage VDD, the emitter outputs a voltage VCC1 and is connected to one end of a diode D3, the other end of the diode D3 outputs a first relay control signal and a signal RL1 through a resistor R13; further comprising a second BUCK circuit, wherein the BUCK circuit is connected to the signal RL1 through a diode D5.
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