CN205378295U - LED constant voltage power supply controller - Google Patents

Abstract

The utility model discloses a LED constant voltage power supply controller, including transformer T, resistance R1, electric capacity C1, potentiometre RP1, triode VT1, diode D1 and triode VT2, resistance R1 one end connect respectively VCC and transformer T coil L1, triode VT3 collecting electrode and resistance R7 are connected respectively to the transformer T coil L1 other end, electric capacity C5 is connected to the resistance R7 other end, electric capacity C4 is connected respectively to the resistance R1 other end, triode VT3 base and transformer T coil L2, electric capacity C3 is connected respectively to the transformer T coil L2 other end, anodal and the diode D2 negative pole of diode D1, the electric capacity C4 other end and resistance R5 are connected respectively to diode D1 negative pole, triode VT2 collecting electrode is connected to the resistance R5 other end. The utility model discloses LED constant voltage power supply controller carries out steady voltage control at transformer T through once inclining, directly adopt transformer T to carry out isolating driver, has saved and has kept apart the design together for circuit structure is retrencied, and is small, with low costs, and application scope is wide.

Description

A kind of LED stabilized-voltage power supply controller

Technical field

This utility model relates to a kind of LED, specifically a kind of LED stabilized-voltage power supply controller.

Background technology

In today that energy crisis and climate warming problem are increasingly severe, energy-conservation become social focus subject under discussion with environmental protection.LED gets more and more people's extensive concerning because of features such as plurality of advantages such as it is efficient, energy-saving and environmental protection, life-span length, rich color, volume flicker little, resistance to, reliability are high, regulation and control are convenient, it is believed that be 21 century the most promising lighting source.Traditional electric filament lamp efficiency is low, power consumption is high；Fluorescent lamp power saving, but service life is short, frangible, and there is mercury pollution in garbage；There is the shortcomings such as efficiency is low, power consumption is high, the life-span is short, hazards of electromagnetic radiation in high-intensity gas discharge lamp；If the traditional lighting of current poor efficiency, highly energy-consuming can be replaced with LED illumination, current more and more urgent energy shortage and ecological deterioration problem can be alleviated undoubtedly.C-V characteristic and temperature characterisitic due to LED self so that the sensitivity of electric current is higher than the sensitivity to voltage by LED, therefore can not be powered directly to LED by traditional power supply.Therefore, make lighting source with LED and first will solve the problem of power drives, how to provide the LED power circuit that stability is high, cost is low to become the research direction of Ge great LED producer.Existing a lot of LED power controller is all after adopting transformator transformation, by voltage being carried out sampling processing in transformer secondary thus reaching the purpose of voltage stabilizing, but need unavoidably to be again with isolating means after transformer primary processes, the capacity of resisting disturbance making whole power-supply controller of electric strengthens, the whole controller volume made is relatively big, and the miniaturization for LED is quite unfavorable.

Utility model content

The purpose of this utility model is in that to provide a kind of LED stabilized-voltage power supply controller, with the problem solving to propose in above-mentioned background technology.

For achieving the above object, this utility model provides following technical scheme:

nullA kind of LED stabilized-voltage power supply controller，Including transformator T、Resistance R1、Electric capacity C1、Potentiometer RP1、Audion VT1、Diode D1 and audion VT2，Described resistance R1 one end connects power supply VCC and transformator T coil L1 respectively，The transformator T coil L1 other end is connecting triode VT3 colelctor electrode and resistance R7 respectively，The resistance R7 other end connects electric capacity C5，The resistance R1 other end connects electric capacity C4 respectively、Audion VT3 base stage and transformator T coil L2，The transformator T coil L2 other end connects electric capacity C3 respectively、Diode D1 positive pole and diode diode D2 negative pole，Diode D1 negative pole connects the electric capacity C4 other end and resistance R5 respectively，Resistance R5 other end connecting triode VT2 colelctor electrode，Audion VT2 base stage connects potentiometer RP2 slide plate and resistance R4 respectively，Potentiometer RP2 one end connects resistance R2 and audion VT1 colelctor electrode respectively，The resistance R2 other end connects electric capacity C1 respectively、Potentiometer RP1 one end、Resistance R3 and diode D3 negative pole，Diode D3 positive pole connection transformer T coil L3，The resistance R3 other end is connecting triode VT1 emitter stage and electric capacity C2 respectively，The electric capacity C2 other end connects the electric capacity C1 other end、The potentiometer RP2 other end、The resistance R4 other end、Audion VT2 emitter stage、The electric capacity C3 other end、Diode D2 positive pole、The resistance R6 other end、The electric capacity C5 other end and the transformator T coil L3 other end.

As this utility model further scheme: described transformator T coil L4 one end ground connection, other end connecting luminous diode LED.

Compared with prior art, the beneficial effects of the utility model are: this utility model LED stabilized-voltage power supply controller is by carrying out voltage stabilizing control at transformator T primary side, transformator T is directly adopted to carry out isolation drive, save one isolation design, circuit structure is simplified, volume is little, and cost is low, applied widely.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of LED stabilized-voltage power supply controller.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.

nullRefer to Fig. 1，In this utility model embodiment，A kind of LED stabilized-voltage power supply controller，Including transformator T、Resistance R1、Electric capacity C1、Potentiometer RP1、Audion VT1、Diode D1 and audion VT2，Described resistance R1 one end connects power supply VCC and transformator T coil L1 respectively，The transformator T coil L1 other end is connecting triode VT3 colelctor electrode and resistance R7 respectively，The resistance R7 other end connects electric capacity C5，The resistance R1 other end connects electric capacity C4 respectively、Audion VT3 base stage and transformator T coil L2，The transformator T coil L2 other end connects electric capacity C3 respectively、Diode D1 positive pole and diode diode D2 negative pole，Diode D1 negative pole connects the electric capacity C4 other end and resistance R5 respectively，Resistance R5 other end connecting triode VT2 colelctor electrode，Audion VT2 base stage connects potentiometer RP2 slide plate and resistance R4 respectively，Potentiometer RP2 one end connects resistance R2 and audion VT1 colelctor electrode respectively，The resistance R2 other end connects electric capacity C1 respectively、Potentiometer RP1 one end、Resistance R3 and diode D3 negative pole，Diode D3 positive pole connection transformer T coil L3，The resistance R3 other end is connecting triode VT1 emitter stage and electric capacity C2 respectively，The electric capacity C2 other end connects the electric capacity C1 other end、The potentiometer RP2 other end、The resistance R4 other end、Audion VT2 emitter stage、The electric capacity C3 other end、Diode D2 positive pole、The resistance R6 other end、The electric capacity C5 other end and the transformator T coil L3 other end；Described transformator T coil L4 one end ground connection, other end connecting luminous diode LED.

nullOperation principle of the present utility model is: refer to Fig. 1，When after the switch that switches on power，DC source VCC adds to the c pole of VT3 through switch transformer T coil L1，Also add to the b pole of VT3 through R1 simultaneously，Then the conducting of switching tube VT3，Electric current is had to pass through L1 winding，Due to electromagnetic induction，Transformator T coil L2 lower end induces positive feedback voltage，Give the b pole of VT3，Make that VT3's is saturated rapidly，The c electrode current of VT3 reaches maximum，Meanwhile，Transformator T coil L2 winding upper negative under positive induced voltage also tie through the b-e of VT3 and charge to C3，Its polarity be upper negative under just，Continuous rising with C3 charging voltage，The b electrode potential of VT3 constantly declines，Cause quickly exiting saturation region and entering amplification region of VT3，Then the electric current (namely flowing through the electric current of L1 winding) flowing through the e pole of VT3 is transferred to reduction by maximum，Cause L1、L2 induces the induced voltage contrary with the entrance saturation conduction process of VT3，It is upper just lower negative for L2，So that the b pole tension of VT3 reduces further，Quickly enter cut-off state，After the cut-off of VT3，The lower negative voltage of just going up that C3 fills begins through D2 electric discharge，This process makes again the b electrode potential of VT3 raise，When after C3 discharge off，The repetition said process again of VT3，Enter the cycle of operation of next cycle.

Its principle of stabilized voltage is: when certain reason makes power supply VCC output voltage raise, transformator T sample coil L3 two ends induced voltage must raise, therefore through D3 rectification, voltage after C1 must raise, the b pole tension ↑ → conducting comparing pipe VT1 is made to increase, be clamped because of e electrode potential prolongation → frequency decline → coil L4 output voltage deadline of the b electrode potential ↓ → VT3 of the e electrode potential ↓ → C4 anodic potentials ↓ → C4 negative pole current potential ↓ → VT3 of the b electrode potential ↓ → VT2 of the c electrode potential ↓ → VT2 of constant → VT1 ↓, achieve voltage stabilizing process, the process that power supply VCC output voltage reduces and said process contrast.

It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and when without departing substantially from spirit of the present utility model or basic feature, it is possible to realize this utility model in other specific forms.Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in this utility model.Any accompanying drawing labelling in claim should be considered as the claim that restriction is involved.

In addition, it is to be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, and the technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.

Claims (2)

1. null1. a LED stabilized-voltage power supply controller，Including transformator T、Resistance R1、Electric capacity C1、Potentiometer RP1、Audion VT1、Diode D1 and audion VT2，It is characterized in that，Described resistance R1 one end connects power supply VCC and transformator T coil L1 respectively，The transformator T coil L1 other end is connecting triode VT3 colelctor electrode and resistance R7 respectively，The resistance R7 other end connects electric capacity C5，The resistance R1 other end connects electric capacity C4 respectively、Audion VT3 base stage and transformator T coil L2，The transformator T coil L2 other end connects electric capacity C3 respectively、Diode D1 positive pole and diode diode D2 negative pole，Diode D1 negative pole connects the electric capacity C4 other end and resistance R5 respectively，Resistance R5 other end connecting triode VT2 colelctor electrode，Audion VT2 base stage connects potentiometer RP2 slide plate and resistance R4 respectively，Potentiometer RP2 one end connects resistance R2 and audion VT1 colelctor electrode respectively，The resistance R2 other end connects electric capacity C1 respectively、Potentiometer RP1 one end、Resistance R3 and diode D3 negative pole，Diode D3 positive pole connection transformer T coil L3，The resistance R3 other end is connecting triode VT1 emitter stage and electric capacity C2 respectively，The electric capacity C2 other end connects the electric capacity C1 other end、The potentiometer RP2 other end、The resistance R4 other end、Audion VT2 emitter stage、The electric capacity C3 other end、Diode D2 positive pole、The resistance R6 other end、The electric capacity C5 other end and the transformator T coil L3 other end.
2. 2. LED stabilized-voltage power supply controller according to claim 1, it is characterised in that described transformator T coil L4 one end ground connection, other end connecting luminous diode LED.