CN202652639U

CN202652639U - Driving power supply circuit free of electrolytic capacitor

Info

Publication number: CN202652639U
Application number: CN201220276588XU
Authority: CN
Inventors: 汤兆林
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-06-13
Filing date: 2012-06-13
Publication date: 2013-01-02
Anticipated expiration: 2022-06-13

Abstract

The utility model relates to a power supply circuit, particularly, a driving power supply circuit free of an electrolytic capacitor. The driving power supply circuit includes a bridge pile rectification circuit, a driving circuit, and loads. The bridge pile rectification circuit includes a rectifier diode set, and the driving circuit includes a driving control chip. The driving power supply circuit free of the electrolytic capacitor converts an AC civil power to a DC positive half wave via the bridge pile rectification circuit, and adjusts the parameters of an external element to obtain a stable voltage current, and branches multi-path outputs from the driving circuit to be used by each LED load, thereby preventing the LED load from being damaged because of over voltage.

Description

A kind of driving power circuit of no electrolytic capacitor

Technical field

The utility model relates to a kind of LED lighting source circuit, especially a kind of driving power circuit of no electrolytic capacitor.

Technical background

In the solution of the drive circuit that traditional LED throws light on, Main Problems has: one, use low voltage and high current, must use high-capacity LED, its production cost is difficult to reduce; Two, use the transformer switching energy of large volume, take sizable space; Three, use the high-voltage electrolytic capacitor that polarity is arranged, if long-time use the, the sharply life-span of reduction element.

The utility model content

The purpose of this utility model provides a kind ofly can not use high-voltage electrolytic capacitor, do not need transformer turn can and can drive with constant current type the driving power circuit of the no electrolytic capacitor of high-voltage LED, this circuit can significantly reduce the external element number, saves shared space.

To achieve these goals, the utility model adopts following technical scheme:

A kind of driving power circuit of no electrolytic capacitor, it comprises bridge heap rectification circuit, drive circuit and load three parts;

Described bridge heap rectification circuit comprises rectifier diode group BD1, the first rectification input, the second rectification input, the first rectification output end and the second rectification output end, described drive circuit comprises driving control chip U1, drives earth terminal, driving power end and some drive output, and described load comprises positive pole and negative pole; Described the first rectification input termination civil power live wire, described the second rectification input termination civil power zero line, described the first rectification output end connects the positive pole of load, and described the second rectification output end connects the driving earth terminal, the negative pole of described driver output termination load.

Preferably, described bridge heap rectification circuit also comprises:

Commutation capacitor C1 is used for rectified current is carried out filtering;

Transient Suppression Diode TVS1 is used for absorbing the surge power up to thousands of watts;

Described commutation capacitor C1 is in parallel with bridge heap rectification circuit with Transient Suppression Diode TVS1.

Preferably, described drive circuit also comprises:

Drive capacitor C 2, be used for high-frequency signal filtering;

Drive voltage stabilizing didoe Z2, a stable voltage is provided, prevent that overtension from causing in-line power unstable;

Principal current is set resistance R 1, is used for sampling, can set the flow valuve of rationing the power supply of principal current;

Described driving control chip U1 also comprises:

Earth terminal 10 is used for over the ground short circuit;

With driving capacitor C 2, the anodal external reference voltage terminal 9 that links to each other of driving voltage stabilizing didoe Z2, be used for connecting an external voltage respectively;

Principal current is set resistance terminal 8, is used for connecting principal current and sets resistance R 1.

Preferably, described drive output comprises 2 pin, 3 pin, 4 pin, 5 pin, 6 pin, 7 pin that drive control chip U1.

Owing to adopted such scheme, the driving power circuit of no electrolytic capacitor of the present utility model converts electric main to the direct current positive half wave by bridge heap rectification circuit, regulate the parameter of outer member, obtain a stably electric current and voltage, tell multichannel again and export to each paths of LEDs load use from drive circuit, load causes damage to LED to have avoided overtension.

Description of drawings

Fig. 1 is the circuit diagram of the utility model embodiment.

Embodiment

As shown in Figure 1, a kind of driving power circuit of no electrolytic capacitor, it comprises bridge heap rectification circuit 1, drive circuit 2, load 3; Bridge heap rectification circuit 1 comprises rectifier diode group BD1, the first rectification input, the second rectification input, the first rectification output end and the second rectification output end, bridge heap rectification circuit 1 is more level and smooth direct current with the direct rectification in grid alternating current source, uses for the next stage conversion; Drive circuit 2 comprises driving control chip U1, drives earth terminal, driving power end and some drive output, and load 3 comprises positive terminal and negative pole end; The first rectification input termination civil power live wire, the second rectification input termination civil power zero line, the first rectification output end connects the positive terminal of load, and the second rectification output end connects the driving earth terminal, the negative pole end of driver output termination load.

Bridge heap rectification circuit 1 also comprises commutation capacitor C1, is used for rectified current is carried out filtering; Transient Suppression Diode TVS1 is used for absorbing the surge power up to thousands of watts; Commutation capacitor C1 is in parallel with bridge heap rectification circuit 1 with Transient Suppression Diode TVS1.

Drive circuit 2 also comprises: drive capacitor C 2, be used for high-frequency signal filtering; Drive voltage stabilizing didoe Z2, a stable voltage is provided, prevent that overtension from causing in-line power unstable; Principal current is set resistance R 1, is used for sampling, can set the flow valuve of rationing the power supply of principal current;

Driving control chip U1 also comprises: earth terminal 10 is used for over the ground short circuit; With driving capacitor C 2, the anodal external reference voltage terminal 9 that links to each other of driving voltage stabilizing didoe Z2, be used for connecting an external voltage respectively; Principal current is set resistance terminal 8, is used for connecting principal current and sets resistance R 1.

Drive output comprises 2 pin, 3 pin, 4 pin, 5 pin, 6 pin, 7 pin that drive control chip U1, consists of six groups of current-limiting circuits, the different and difference to some extent of the current-limiting resistance that the every group of flow valuve of rationing the power supply established in complying with, and the 6th group current-limiting resistance is external, and all the other connect mode in adopting.

The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims

1. the driving power circuit of a no electrolytic capacitor is characterized in that, it comprises bridge heap rectification circuit, drive circuit and load three parts;

Described bridge heap rectification circuit comprises rectifier diode group (BD1), the first rectification input, the second rectification input, the first rectification output end and the second rectification output end, described drive circuit comprises driving control chip (U1), drives earth terminal, driving power end and some drive output, and described load comprises positive pole and negative pole; Described the first rectification input termination civil power live wire, described the second rectification input termination civil power zero line, described the first rectification output end connects the positive pole of load, and described the second rectification output end connects the driving earth terminal, the negative pole of described driver output termination load.

2. the driving power circuit of no electrolytic capacitor as claimed in claim 1 is characterized in that, described bridge heap rectification circuit also comprises:

Commutation capacitor (C1) is used for rectified current is carried out filtering;

Transient Suppression Diode (TVS1) is used for absorbing the surge power up to thousands of watts;

Described commutation capacitor (C1) is in parallel with bridge heap rectification circuit with Transient Suppression Diode (TVS1).

3. the driving power circuit of no electrolytic capacitor as claimed in claim 1 is characterized in that, described drive circuit also comprises:

Drive electric capacity (C2), be used for high-frequency signal filtering;

Drive voltage stabilizing didoe (Z2), a stable voltage is provided, prevent that overtension from causing in-line power unstable;

Principal current is set resistance (R1), is used for sampling, can set the flow valuve of rationing the power supply of principal current;

Described driving control chip (U1) also comprises:

Earth terminal (10) is used for over the ground short circuit;

With driving electric capacity (C2), the anodal external reference voltage terminal (9) that links to each other of driving voltage stabilizing didoe (Z2), be used for connecting an external voltage respectively;

Principal current is set resistance terminal (8), is used for connecting principal current and sets resistance (R1).

4. the driving power circuit of no electrolytic capacitor as claimed in claim 3 is characterized in that, described drive output comprises 2 pin, 3 pin, 4 pin, 5 pin, 6 pin, 7 pin that drive control chip (U1).