LED lamp with constant current dimming drive circuit based on PWM input
US10499467B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2018 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Dec 18, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/59
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED lamp with constant current dimming drive circuit based on PWM input includes a PWM variable power supply input end, a PWM matching circuit, a voltage rectifying circuit, a DC-DC constant current output circuit and an LED lamp, and the voltage signal of the PWM variable power supply input end is provided by the PWM voltage output power supply, and the PWM variable power supply input end is respectively connected with the PWM matching circuit and the voltage rectifying circuit, and the PWM matching circuit is connected with the enable end of the DC-DC constant current output circuit, and the voltage rectifying circuit is connected to the power supply end of the DC-DC constant current output circuit, and the voltage of the voltage rectifying circuit changes according to the duty ratio of the voltage of the PWM variable power supply input end, and the voltage of the PWM variable power supply input end passes through the voltage dividing resistor of PWM matching circuit and output PWM control signal, and PWM control signal realizes non-stroboscopic adjustment LED lamp through the DC-DC constant current output circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.