Konstantstromtreiberschaltung, Verfahren zur Berechnung der Schaltungseingangsleistung und Lampe

Details

Veröffentlichungs-Nr.

EP4734662

Anmeldetag

20. Juni 2024

Veröffentlichung

26. Dezember 2024

Rechtsraum

EP

IPC

H05B45/345

Abstract

The present application provides a constant current drive circuit, a circuit input power calculation method, and a lamp. The constant current drive circuit comprises: a constant voltage module, converting an external alternating current into a direct current of a constant voltage, an output negative end of the constant voltage module being connected to a first resistor; a constant current module, being connected to the constant voltage module, and converting the direct current of the constant voltage into a direct current of a constant current; an operational amplifier detection module, detecting the voltage of the first resistor; and a control module, the control module being connected to an output positive end of the constant voltage module, and detecting an output voltage of the constant voltage module, the control module being also connected to the operational amplifier detection module, and an output end of the control module being connected to the constant current module and being configured to output a signal to the constant current module. The operational amplifier detection module is used to amplify the detected voltage of the first resistor by means of a preset amplification factor and then output the amplified voltage to the control module, and the control module can calculate input power of the constant current drive circuit according to the detected output voltage of the constant voltage module and the voltage of the first resistor.

Anmelder

Firmen

Suzhou Opple Lighting Co., Ltd.
Opple Lighting Co., Ltd.

Land

🇨🇳 China

Fachgebiete