LED drive device, battery charger and drive control circuit of LED drive device

Abstract

The invention relates to a drive control circuit which comprises an input power module connected with an input end, a PWM control module connected with the input power module, a perfusion circuit module connected with the output end of the PWM control module, a voltage fluctuation detection module connected with the input power module through an inductor L1 and a constant current source module connected with the voltage fluctuation detection module through a diode D4, wherein the constant current source module is connected with a load. Compared with the prior art, the drive control circuit has the advantages that an electrolysis capacitor is not included in the circuit, the circuit is simple in structure and can be conveniently integrated and miniaturized, and the service life of a power supply is long; the input power module has a reverse-connection-proof function, when the power supply is reversely connected, the circuit does not work, and safety and reliability of the circuit are effectively improved; output wide voltages and currents are adjustable, the adjustable interval is large, use flexibility is high, the application range is wide, and popularization is easy to achieve; the voltage fluctuation detection module can meet requirements for multiple functions and variety.

Description

technical field [0001] The invention relates to the technical field of load drive circuit control, in particular to a drive control circuit that provides constant voltage and constant current for loads. Background technique [0002] The use of LED lamps to realize lighting is becoming more and more widely used, but LED lamps cannot be directly connected to the power supply, but need to use a stable power supply as its driving power to work normally. There are various driving methods for LEDs. Most of the current LED drive power supply adopts the constant current method of switching voltage regulation, but this method is costly, the circuit is more complicated, and there will be electromagnetic interference; most of the circuits that convert the power supply into a constant current drive source include electrolytic capacitors. The electrolytic capacitor electrolyte is easy to dry up and be broken down, which affects the service life of the constant current drive source. [0...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a drive for the existing technology that most of the circuits that convert the power supply into a constant current or constant voltage drive source contain electrolytic capacitors, which affect the service life of the constant current drive source. Control circuit, simple circuit and long service life

[0005] Another technical problem to be solved by the present invention is to provide an A kind of LED driving device, wherein the driving control circuit connection structure is simple and the service life is long

[0006] Another technical problem to be solved by the present invention is to provide an A battery charger in which the drive control circuit has a simple connection structure and a long service life

Images