一种LED灯控制电路及智能灯
By using a wide-voltage-range power supply circuit and boost circuit, combined with a totem pole drive circuit and multiple PWM signals, the problems of poor display effect and high cost caused by fixed current in existing LED lamp control circuits are solved, achieving flexible multi-color display and circuit simplification.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN GIANT LIGHTING TECHNOLOGY CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-17
AI Technical Summary
In existing LED light control circuits, the fixed current limits the power, making it impossible to adjust, resulting in poor display effects, color modes that cannot meet requirements, and complex and costly circuits.
It adopts a power supply circuit with a wide voltage range, combined with a boost circuit and a control circuit. Through a totem pole drive circuit and multiple PWM drive signals, it realizes a parallel topology, simplifies the circuit structure, reduces cascaded chips, and supports flexible adjustment of multiple LED modules.
It enables flexible adjustment of multiple LED modules, simplifies circuit structure, reduces costs, improves driving capability, reduces temperature, and supports multiple color displays.
Smart Images
Figure CN224521224U_ABST
Abstract
Claims
1. An LED lamp control circuit applied to an LED module, characterized in that, It includes a power supply circuit, a boost circuit, a control circuit, and several drive circuits; The power supply circuit is used to provide an input voltage, the range of which is 5~24V; The boost circuit is used to boost the input voltage and then output it to the LED module; The control circuit is connected to the LED module through the driving circuit. The control circuit is used to output multiple PWM driving signals to drive multiple LED modules. The driving circuit is a totem pole driving circuit. The control circuit is connected to the boost circuit and is used to output control signals to the boost circuit to control the working state of the boost circuit. The driving circuit includes a first switch, a second switch, a third switch, a first resistor, a second resistor, and a third resistor. The collector of the first switch is connected to a voltage source. The emitters of the first switch, the emitters of the second switch, and the gate of the third switch are connected together. The bases of the first switch and the second switch are connected together and connected to the control circuit to receive the PWM driving signal. The first resistor is connected between the collector and the base of the first switch. The second resistor is connected between the collector and the base of the second switch. The drain of the third switch is connected to the LED module. The source of the third switch is grounded through the third resistor. The source of the third switch is connected to the control circuit and is used to output a sampling current to the control circuit.
2. The LED lamp control circuit of claim 1, wherein, The power supply circuit includes a battery module, a power supply interface, a switching module, and a protection module. The battery module includes multiple lithium batteries connected in series. The power supply interface is used to connect to an external power source and is connected to the LED module through the boost circuit. The protection module is connected to the battery module and is used to monitor the charging and discharging status of the lithium batteries. The switching module is connected to the power supply interface and the battery module and is used to switch the power supply to the LED module from the external power source and the battery module.
3. The LED lamp control circuit as described in claim 2, characterized in that, The switching module includes a single voltage comparator. The first input terminal of the single voltage comparator is a fixed voltage. The second input terminal of the single voltage comparator is connected to the power supply interface. The output terminal of the single voltage comparator is used to output a level signal. When the input voltage is greater than or equal to a preset threshold, the single voltage comparator outputs a low-level signal so that the input voltage is directly input to the LED module.
4. The LED lamp control circuit of claim 3, wherein, The boost circuit includes a boost chip, model PW4040. The control circuit controls the operating state of the boost chip by sampling the input voltage. When the boost chip needs to boost the input voltage, the control circuit outputs a control signal to the feedback pin of the boost chip to control its boost ratio.
5. The LED lamp control circuit of claim 2, wherein, The protection module includes a battery management chip, model number CM1270, and the control circuit includes a control chip, model number WS8100_QFN48.
6. The LED lamp control circuit of claim 2, wherein, It also includes an indicator module, which includes a first indicator light and a second indicator light. The first indicator light is used to indicate that the battery module is charging, and the second indicator light is used to indicate that the battery module is fully charged.
7. The LED lamp control circuit of claim 1, wherein, The LED module consists of four groups, each group including an RGBW light strip. The control circuit outputs four PWM drive signals to drive the four color displays of the RGBW light strip respectively.
8. The LED lamp control circuit of claim 7, wherein, Multiple RGBW light strips are connected in parallel.
9. A smart lamp, characterized in that, Includes the LED lamp control circuit according to any one of claims 1 to 8.