CN202085360U

CN202085360U - LED constant current driving power source capable of automatically steplessly adjusting in multi-period

Info

Publication number: CN202085360U
Application number: CN2011201707134U
Authority: CN
Inventors: 张彬; 梁化军; 邢玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-26
Filing date: 2011-05-26
Publication date: 2011-12-21
Anticipated expiration: 2021-05-26

Abstract

The utility model relates to an LED constant current driving power source capable of automatically steplessly adjusting in multi-period. The power resource includes an anti-surge circuit, an EMI filter circuit, a rectification circuit, a transformer winding circuit, a voltage and current feedback circuit, a voltage-stabilizing circuit, a DC/DC converting circuit, a controller circuit and a power factor correction (PFC) circuit. The rectification circuit includes a front-end rectification circuit, a rear-end rectification circuit and a field-effect tube circuit. The anti-surge circuit, the EMI filter circuit and the front-end rectification circuit are connected successively. The front-end rectification circuit and the rear-end rectification circuit are connected with transformer winding circuit separately. The transformer winding circuit, the field-effect tube circuit and the PFC circuit are connected successively. The controller circuit, the feedback circuit and the PFC circuit are connected successively. The transformer winding circuit, the voltage stabilizing circuit and the PFC circuit are connected successively. The transformer winding circuit, the stabilizing circuit and the feedback circuit are connected successively. The rear end of the rectification circuit, the DC/DC converting circuit and the feedback circuit are connected successively. The rear end of the rectification circuit, the DC/DC converting circuit and the controller circuit are connected successively.

Description

A kind of multi-period power automatic stepless adjustment type LED constant-current driving power supply

Technical field

The utility model relates to a kind of LED driving power equipment, specifically is a kind of multi-period power automatic stepless adjustment type LED constant-current driving power supply.

Background technology

In recent years, LED lighting technology fast development, but present LED driving power exists power output limited, problem such as output current, magnitude of voltage size are non-adjustable has reduced lighting quality, has restricted the application of LED illumination.

Summary of the invention

The purpose of this utility model is, guarantees the lighting power of LED lamp, improves energy conversion efficiency, improves lighting quality.

For achieving the above object, the utility model has adopted following technical scheme:

A kind of multi-period power automatic stepless adjustment type LED constant-current driving power supply, it is characterized in that: this power-supply device comprises anti-surge circuit, the EMI filter circuit, rectification circuit, the Transformer Winding circuit, voltage, current feedback circuit, voltage stabilizing circuit, the DC/DC translation circuit, controller circuitry and power factor correction (PFC) circuit; Rectification circuit comprises prime rectification circuit, back level rectification circuit and field effect transistor circuit; Anti-surge circuit, EMI filter circuit are connected successively with the prime rectification circuit; The prime rectification circuit is connected with the Transformer Winding circuit respectively with back level rectification circuit; Transformer Winding circuit, field effect transistor circuit and power factor correction (PFC) circuit are connected successively; Controller circuitry, feedback circuit are connected successively with power factor correction (PFC) circuit; Transformer Winding circuit, voltage stabilizing circuit are connected successively with pfc circuit; Transformer Winding circuit, voltage stabilizing circuit are connected successively with feedback circuit; Level, DC/DC translation circuit are connected successively with feedback circuit behind the rectification circuit; Level, DC/DC translation circuit are connected successively with controller circuitry behind the rectification circuit.

Compared with prior art, the utlity model has following useful effect:

Anti-surge circuit prevents the harm that the surge phenomenon may cause equipment; The EMI filter circuit prevents electromagnetic pollution between equipment and electrical network; Rectification circuit transfers alternating voltage to unidirectional pulsating nature direct voltage; The isolation between Transformer Winding circuit realization input and output and the transmission of energy; Voltage, current feedback circuit and controller circuitry are realized the programming Control of output current, voltage, the step-less adjustment of the programmed settings of working hour and day part power output; Pfc circuit is realized the efficient utilization of energy; Voltage stabilizing circuit is used for pfc circuit and feedback circuit work power supply; The DC/DC translation circuit is used for feedback circuit and controller circuitry work power supply.

Description of drawings

Fig. 1 is a LED constant-current driving power supply theory diagram.

Fig. 2 is anti-surge circuit, EMI filter circuit, prime rectification circuit, Transformer Winding circuit, back level rectification circuit and power field effect pipe circuit theory diagrams.

Fig. 3 is a DC/DC translation circuit schematic diagram.

Fig. 4 is current feedback circuit, voltage feedback circuit, voltage stabilizing circuit, power factor correction (PFC) circuit theory diagrams.

Fig. 5 is the controller circuitry schematic diagram.

Wherein, 1-anti-surge circuit; The 2-EMI filter circuit; 3-prime rectification circuit; 4-Transformer Winding circuit; Level rectification circuit behind the 5-; 6-power field effect pipe circuit; The 7-DC/DC translation circuit; The 8-current feedback circuit; The 9-voltage feedback circuit; The 10-voltage stabilizing circuit; 11-power factor correction (PFC) circuit; The 12-controller circuitry.

Embodiment

Below in conjunction with Figure of description 1-5 embodiment of the present utility model is described further, but the claimed scope of the utility model is not limited thereto.

See Fig. 1.A kind of multi-period power automatic stepless adjustment type LED constant-current driving power supply, it is characterized in that: this power-supply device comprises anti-surge circuit, the EMI filter circuit, rectification circuit, the Transformer Winding circuit, voltage, current feedback circuit, voltage stabilizing circuit, the DC/DC translation circuit, controller circuitry and power factor correction (PFC) circuit; Rectification circuit comprises prime rectification circuit, back level rectification circuit and field effect transistor circuit; Anti-surge circuit, EMI filter circuit are connected successively with the prime rectification circuit; The prime rectification circuit is connected with the Transformer Winding circuit respectively with back level rectification circuit; Transformer Winding circuit, field effect transistor circuit and power factor correction (PFC) circuit are connected successively; Controller circuitry, feedback circuit are connected successively with power factor correction (PFC) circuit; Transformer Winding circuit, voltage stabilizing circuit are connected successively with pfc circuit; Transformer Winding circuit, voltage stabilizing circuit are connected successively with feedback circuit; Level, DC/DC translation circuit are connected successively with feedback circuit behind the rectification circuit; Level, DC/DC translation circuit are connected successively with controller circuitry behind the rectification circuit.Gin among Fig. 1 and Gout are respectively input earth signal and output earth signal.

See Fig. 2.Anti-surge circuit comprises fuse and Transient Suppression Diode two parts, effectively prevents the big electric current that the surge phenomenon causes, the harm that overvoltage may cause equipment; The EMI filter circuit comprises two-stage, can be good at high frequency clutter and homophase disturbance current in the filtering electrical network, simultaneously the electromagnetic radiation that produces in the power supply is cut to bottom line, avoids miscellaneous equipment is caused harmful effect; Rectification circuit comprises prime rectification circuit, back level rectification circuit and power field effect pipe, with Transformer Winding circuit cooperating, transfers alternating voltage to unidirectional pulsating nature direct voltage, is used for the driving LED light fixture.The Transformer Winding circuit comprises an input winding and two output windings in application, totally three parts realize the transmission of energy from the prime rectification circuit to back level rectification circuit and voltage stabilizing circuit, and realizes the isolation between the input and output.

See Fig. 1 and Fig. 3.The DC/DC translation circuit utilizes the integrated power supply chip, and conversion rectification circuit output energy obtains DC power supply, is used for drive feedback circuit and controller circuitry work (being the in-line power (1) of Fig. 1).

See Fig. 1 and Fig. 4.Current feedback circuit and voltage feedback circuit compare electric current, the magnitude of voltage (being current detecting, the voltage detecting among Fig. 1) of the actual output of rectification circuit respectively with electric current, the voltage reference value (being Current Control, the voltage control among Fig. 1) that controller circuitry is set, comparative result is passed to power factor correction (PFC) circuit (being current feedback, the Voltage Feedback among Fig. 1), be used to export the PWM waveform of different frequency, different duty, the on off state of control rectification circuit field effect transistor is realized the control to rectification output current, voltage; The energy that voltage stabilizing circuit obtains by the Transformer Winding circuit (being the in-line power (2) among Fig. 1) is used to provide pfc circuit and feedback circuit work.

See Fig. 1 and Fig. 5.Controller circuitry is by the period of this power module work of setting and electric current, the voltage reference value of different period rectification outputs, final realize this power module output current, voltage programmable control, working hour programmable, day part power output step-less adjustment.Jtag interface among Fig. 1 is a director demon programming interface.

This power-supply device is used for LED lamp constant-current driving and works in multi-period, day part power automatic stepless adjusting.This power-supply device comprises anti-surge circuit, the EMI filter circuit, rectification circuit (comprising prime rectification circuit, back level rectification circuit and field effect transistor circuit), the Transformer Winding circuit, voltage, current feedback circuit, voltage stabilizing circuit, DC/DC translation circuit, controller circuitry and power factor correction (PFC) circuit.

This driving power has the advantages that electromagnetic pollution between the equipment of preventing and the electrical network and surge phenomenon produce, characteristics with input, output isolation, characteristics with output current, voltage programmable control, have working hour programmable and the characteristics of day part power output step-less adjustment, have the characteristics of High Power Factor simultaneously.

Claims

1. multi-period power automatic stepless adjustment type LED constant-current driving power supply, it is characterized in that: this power-supply device comprises anti-surge circuit, the EMI filter circuit, rectification circuit, the Transformer Winding circuit, voltage, current feedback circuit, voltage stabilizing circuit, the DC/DC translation circuit, controller circuitry and power factor correction (PFC) circuit; Rectification circuit comprises prime rectification circuit, back level rectification circuit and field effect transistor circuit; Anti-surge circuit, EMI filter circuit are connected successively with the prime rectification circuit; The prime rectification circuit is connected with the Transformer Winding circuit respectively with back level rectification circuit; Transformer Winding circuit, field effect transistor circuit and power factor correction (PFC) circuit are connected successively; Controller circuitry, feedback circuit are connected successively with power factor correction (PFC) circuit; Transformer Winding circuit, voltage stabilizing circuit are connected successively with pfc circuit; Transformer Winding circuit, voltage stabilizing circuit are connected successively with feedback circuit; Level, DC/DC translation circuit are connected successively with feedback circuit behind the rectification circuit; Level, DC/DC translation circuit are connected successively with controller circuitry behind the rectification circuit.