CN201496908U

CN201496908U - LED street lamp with intelligent time delay circuit

Info

Publication number: CN201496908U
Application number: CN2009203090593U
Authority: CN
Inventors: 周忠正
Original assignee: GUANGDONG HSK ELECTRONICS TECHNOLOGY Co Ltd
Current assignee: GUANGDONG HSK ELECTRONICS TECHNOLOGY Co Ltd
Priority date: 2009-08-27
Filing date: 2009-08-27
Publication date: 2010-06-02
Anticipated expiration: 2019-08-27

Abstract

The utility model discloses an LED street lamp with an intelligent temperature control circuit, which comprises an LED drive circuit 4, an LED drive circuit 3 which is connected in the LED module group 4 and drives the LED module group 4 to work, and an intelligent time delay circuit which is connected with the LED drive circuit 3, wherein the intelligent timing circuit comprises an intelligent chip control circuit 2 and an intelligent chip power supply circuit 1, direct current VIN which is externally input outputs voltage which is suitable for the intelligent chip control circuit 2 to work on the output end thereof through the intelligent chip power supply circuit 1, the intelligent chip control circuit 2 sends out control signals to control the LED drive circuit 3 according to programs which are set inside when the LED street lamp is started, electric current which flows into the LED module group 4 is gradually increased, the LED module group 4 is prevented from being damaged by the impact of current which is instantly increased when the LED module group 4 is started, thereby playing the time delay protection function.

Description

A kind of LED street lamp with intelligent delay circuit

Technical field

The utility model relates to the LED street lamp, refers to a kind of LED street lamp with intelligent delay circuit especially.

Background technology

LED is a kind of new type light source that adopts semiconductor light emitting, has working stability, the life-span is long, shock resistance is strong, luminous efficiency is high and advantage such as pollution-free.Compare with traditional street lamp, the street lamp that utilizes LED to make obtains popularizing rapidly especially.Whenever The night screen has hung down, all LED street lamps are all opened, and make entire city increase a aesthetic feeling., the LED street lamp can be subjected to the impact of the electric current of one instantaneous increase when opening, and this impact meeting causes damage to LED, thereby reduces its service life.This problem can not be ignored, but present LED street lamp does not take special measure to solve this problem.

The utility model content

The purpose of this utility model is: a kind of LED street lamp with intelligent delay circuit is provided; when this intelligence delay circuit is turned on light at the LED street lamp by the phenomenon of the rush of current of instantaneous increase; utilize the effect of intelligence time-delay; automatically make the current transitions of instantaneous increase become the electric current that increases gradually; avoid the LED street lamp to be subjected to the impact of big electric current with this, thereby play the effect of protection LED street lamp.

The technical scheme that the utility model provides is as follows: a kind of LED street lamp with intelligent delay circuit, comprise led drive circuit 3 and LED module 4, the DC voltage VIN of outside input comes 4 work of driving LED module by led drive circuit 3, it is characterized in that: also comprise the intelligent delay circuit that inserts led drive circuit 3, described intelligent delay circuit comprises intelligent chip control circuit 2 and intelligent chip power supply circuits 1, the DC voltage VIN of outside input is by intelligent chip power supply circuits 1, the voltage that is fit to 2 work of intelligent chip control circuit in its output output, intelligent chip control circuit 2 is started working under this voltage, according to program setting, when the LED street lamp is opened, send different control signals described led drive circuit 3 is controlled

As preferably; above-mentioned described intelligent chip power supply circuits 1 comprise: current-limiting resistance R11; R12; R13; biasing resistor R14; R15; R16; triode Q1; integrated circuit U3; filter capacitor C5; building-out capacitor C6; filter inductance L2 and overvoltage protection diode ZD1; described outside input direct voltage VIN inserts current-limiting resistance R11; R12; one end of R13 parallel connection; the other end in parallel connects the positive terminal of described filter capacitor C5; the tie point of the colelctor electrode of biasing resistor R14 and triode Q1; the other end of described biasing resistor R14 connects described integrated circuit U3 negative pole end; the tie point of the base stage of building-out capacitor C6 and triode Q1; the other end of described building-out capacitor C6 connects described biasing resistor R15; the tie point of the control end of biasing resistor R16 and integrated circuit U3; the described biasing resistor R15 other end connects the emitter stage of described triode Q1 and the tie point of filter inductance L2; the positive terminal of described integrated circuit U3; the negative pole end of filter capacitor C5; the other end of biasing resistor R16 and overvoltage protection diode DZ1 positive terminal ground connection; the negative pole end of described overvoltage protection diode DZ1 connects the tie point of the voltage VCC of the described filter inductance L2 other end and output, and the voltage VCC of described output inserts intelligent chip control circuit 2.

As preferably, above-mentioned intelligent chip control circuit 2 comprises: intelligent chip U2, reset resistor R7, R8, resonant capacitance C7, C8, filter capacitor C9, C10 and crystal oscillator CX1, the voltage VCC of described intelligent chip power supply circuits 1 output inserts the 1st pin of the intelligent chip U2 in the described intelligent chip control circuit 2 and the end of filter capacitor C10, the other end of described filter capacitor C10 connects the 14th pin and the ground of intelligent chip U2, the 2nd pin of described intelligent chip U2 connects the end of crystal oscillator CX1 and resonant capacitance C7, the other end of described resonant capacitance C7 connects the tie point on resonant capacitance C8 and ground, the other end of described crystal oscillator CX1 then connects the tie point of resonant capacitance C8 and intelligent chip U2 the 3rd pin, the voltage VCC of termination intelligent chip power supply circuits 1 output of described reset resistor R7, the tie point of another termination reset resistor R8 and filter capacitor C9, the other end ground connection of described filter capacitor C9, the other end of described reset resistor R8 then connects the 4th pin of intelligent chip U2, the ON/OFF signal and the 6th of the 5th pin output of described intelligent chip U2,7,8,9,10, the PWMD signal of 11 pin output inserts described led drive circuit 3.

The utlity model has following advantage: in traditional LED street lamp, set up intelligent delay circuit; this circuit is by the control to LED street lamp firing current; make the current transitions that moment increases when opening become the electric current that increases gradually; thereby avoid the LED street lamp when opening, to be subjected to the infringement of heavy current impact, protected the LED street lamp effectively.

Description of drawings

Fig. 1 is the utility model circuit block diagram.

Fig. 2 is the circuit theory diagrams of led drive circuit and LED module.

Fig. 3 is the circuit theory diagrams of intelligent chip control circuit.

Fig. 4 is the circuit theory diagrams of intelligent chip power supply circuits.

The specific embodiment

Below in conjunction with accompanying drawing concrete embodiment is illustrated:

As shown in Figure 1, a kind of LED street lamp with intelligent delay circuit, comprise led drive circuit 3 and LED module 4, the DC voltage VIN of outside input comes 4 work of driving LED module by led drive circuit 3, it is characterized in that: also comprise the intelligent delay circuit that inserts led drive circuit 3, described intelligent delay circuit comprises intelligent chip control circuit 2 and intelligent chip power supply circuits 1, the DC voltage VIN of outside input is by intelligent chip power supply circuits 1, the voltage that is fit to 2 work of intelligent chip control circuit in its output output, intelligent chip control circuit 2 is started working under this voltage, when the LED street lamp is opened, send control signal described led drive circuit 3 is controlled.

As shown in Figure 2; described led drive circuit 3 comprises: spike absorption diode D1; sustained diode 2; reverse connecting protection diode D3; filter capacitor C1; C2; C4; feedback capacity C3; current sense resistor R1; R5; R6; opening resistor R3; R4; feedback resistance R2; buck inductor L1 and integrated circuit U1; described outside input direct voltage VIN connects the end of described spike absorption diode D1; the negative pole end of reverse connecting protection diode D3; the 8th pin of integrated circuit U1; the end of the positive terminal of filter capacitor C1 and opening resistor R4; the described spike absorption diode D1 other end; the positive terminal of reverse connecting protection diode D3 and the negative pole end ground connection of filter capacitor C1; the other end of described opening resistor R4 connects opening resistor R3; the other end of described opening resistor R3 connects the 6th pin of integrated circuit U1; the end of described filter capacitor C2 connects the 7th pin of integrated circuit U1; other end ground connection; described current sense resistor R1; R5; R6 is connected in parallel; an end in parallel connects the 5th pin of integrated circuit; other end ground connection in parallel; described feedback capacity C3 serial connection feedback resistance R2; the other end of feedback capacity C3 connects the 2nd pin of integrated circuit U1; the other end of feedback resistance R2 connects the tie point of buck inductor L1 and integrated circuit U1 the 1st pin; the other end of described buck inductor L1 connects the negative pole end of sustained diode 2 and the tie point of filter capacitor C4; the positive terminal ground connection of described sustained diode 2; the other end of described filter capacitor C4 connects the 5th pin of integrated circuit U1; the 5th pin of intelligent chip U2 in the described intelligent chip control circuit 2 connects the 6th pin of integrated circuit U1; the 6th of intelligent chip U2; 7; 8; 9; 10; 11 pin connect the 3rd pin of integrated circuit U1, and the 5th pin of the negative pole end of described sustained diode 2 and integrated circuit U1 inserts described LED module 4 respectively.

As shown in Figure 3, described intelligent chip control circuit 2 comprises: intelligent chip U2, reset resistor R7, R8, resonant capacitance C7, C8, filter capacitor C9, C10 and crystal oscillator CX1, the voltage VCC of described intelligent chip power supply circuits 1 output inserts the 1st pin of the intelligent chip U2 in the described intelligent chip control circuit 2 and the end of filter capacitor C10, the other end of described filter capacitor C10 connects the 14th pin and the ground of intelligent chip U2, the 2nd pin of described intelligent chip U2 connects the end of crystal oscillator CX1 and resonant capacitance C7, the other end of described resonant capacitance C7 connects the tie point on resonant capacitance C8 and ground, the other end of described crystal oscillator CX1 then connects the tie point of resonant capacitance C8 and intelligent chip U2 the 3rd pin, the voltage VCC of termination intelligent chip power supply circuits 1 output of described reset resistor R7, the tie point of another termination reset resistor R8 and filter capacitor C9, the other end ground connection of described filter capacitor C9, the other end of described reset resistor R8 then connects the 4th pin of intelligent chip U2, the ON/OFF signal and the 6th of the 5th pin output of described intelligent chip U2,7,8,9,10, the PWMD signal of 11 pin output inserts described led drive circuit 3.

As shown in Figure 4; described intelligent chip power supply circuits 1 comprise: current-limiting resistance R11; R12; R13; biasing resistor R14; R15; R16; triode Q1; integrated circuit U3; filter capacitor C5; building-out capacitor C6; filter inductance L2 and overvoltage protection diode ZD1; described outside input direct voltage VIN inserts current-limiting resistance R11; R12; one end of R13 parallel connection; the other end in parallel connects the positive terminal of described filter capacitor C5; the tie point of the colelctor electrode of biasing resistor R14 and triode Q1; the other end of described biasing resistor R14 connects described integrated circuit U3 negative pole end; the tie point of the base stage of building-out capacitor C6 and triode Q1; the other end of described building-out capacitor C6 connects described biasing resistor R15; the tie point of the control end of biasing resistor R16 and integrated circuit U3; the described biasing resistor R15 other end connects the emitter stage of described triode Q1 and the tie point of filter inductance L2; the positive terminal of described integrated circuit U3; the negative pole end of filter capacitor C5; the other end of biasing resistor R16 and overvoltage protection diode DZ1 positive terminal ground connection; the negative pole end of described overvoltage protection diode DZ1 connects the tie point of the voltage VCC of the described filter inductance L2 other end and output, and the voltage VCC of described output inserts intelligent chip control circuit 2.

To be described in detail circuit structure of the present utility model below:

1; intelligent chip power supply circuits 1; the effect of this circuit is the direct-current working volts that the DC voltage of outside input converted to the safety and stability that is fit to 2 work of intelligent chip control circuit; wherein comprise a step-down triode Q1; an integrated circuit U3; a filter inductance L2 and an overvoltage protection diode ZD1; after the DC voltage VIN that step-down triode Q1 imports the outside carries out step-down; remove to control step-down triode Q1 by the adjustment of integrated circuit U3; the DC voltage of stable output; by the filtering of filter inductance L2 and the overvoltage protection of overvoltage protection diode ZD1, make the voltage VCC of intelligent chip power supply circuits 1 output safer stable at last.

2, intelligent chip control circuit 2, the effect of this circuit is to carry out the internal processes that sets, sending control signal then controls led drive circuit 4, wherein comprise an intelligent chip U2, a crystal oscillating circuit and a reset circuit, intelligent chip U2 is the core of entire circuit, the transmission of program implementation and control signal, and described crystal oscillating circuit has comprised a crystal oscillator CX1 and resonance capacitor C 7, C8, for intelligent control chip U2 provides stable operating frequency, described reset circuit has comprised reset resistor R7, R8 and a filter capacitor C9, intelligent chip U2 is resetted once when each start, can entanglement with the assurance program, intelligent chip U2 can operate as normal.

3, led drive circuit 4; the effect of this circuit is to provide suitable operating voltage, electric current and protective effect for LED module 5; wherein comprise an integrated circuit U1 and current sense resistor R1, R5, R6; this integrated circuit U1 exports to LED module 5 with outside input direct voltage VIN through after the step-down; simultaneously; current sense resistor R1, R5, R6 will detect and adjust accordingly the electric current of the LED module 5 of flowing through; prevent because of the excessive LED of the burning out module 5 of electric current, played protection LED module 5.

Certainly, above embodiment just is explanation rather than restriction the utility model, the above only is preferred embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, and are included in the utility model patent claim.

Claims

1. LED street lamp with intelligent delay circuit, comprise led drive circuit (3) and LED module (4), the DC voltage VIN of outside input comes driving LED module (4) work by led drive circuit (3), it is characterized in that: also comprise the intelligent delay circuit that inserts led drive circuit (3).

2. the LED street lamp with intelligent delay circuit according to claim 1, it is characterized in that: described intelligent delay circuit comprises intelligent chip control circuit (2) and intelligent chip power supply circuits (1), the DC voltage VIN of outside input is by intelligent chip power supply circuits (1), the voltage that is fit to intelligent chip control circuit (2) work in its output output, intelligent chip control circuit (2) is started working under this voltage, according to program setting,, send different signals described led drive circuit (3) is controlled in this light period at the LED street lamp.

3. the LED street lamp with intelligent delay circuit according to claim 2; it is characterized in that: described intelligent chip power supply circuits (1) comprising: current-limiting resistance R11; R12; R13; biasing resistor R14; R15; R16; triode Q1; integrated circuit U3; filter capacitor C5; building-out capacitor C6; filter inductance L2 and overvoltage protection diode ZD1; described outside input direct voltage VIN inserts current-limiting resistance R11; R12; one end of R13 parallel connection; the other end in parallel connects the positive terminal of described filter capacitor C5; the tie point of the colelctor electrode of biasing resistor R14 and triode Q1; the other end of described biasing resistor R14 connects described integrated circuit U3 negative pole end; the tie point of the base stage of building-out capacitor C6 and triode Q1; the other end of described building-out capacitor C6 connects described biasing resistor R15; the tie point of the control end of biasing resistor R16 and integrated circuit U3; the described biasing resistor R15 other end connects the emitter stage of described triode Q1 and the tie point of filter inductance L2; the positive terminal of described integrated circuit U3; the negative pole end of filter capacitor C5; the other end of biasing resistor R16 and overvoltage protection diode DZ1 positive terminal ground connection; the negative pole end of described overvoltage protection diode DZ1 connects the tie point of the voltage VCC of the described filter inductance L2 other end and output, and the voltage VCC of described output inserts intelligent chip control circuit (2).

4. the LED street lamp with intelligent delay circuit according to claim 2, it is characterized in that: described intelligent chip control circuit (2) comprising: intelligent chip U2, reset resistor R7, R8, resonant capacitance C7, C8, filter capacitor C9, C10 and crystal oscillator CX1, the voltage VCC of described intelligent chip power supply circuits (1) output inserts the 1st pin of the intelligent chip U2 in the described intelligent chip control circuit (2) and the end of filter capacitor C10, the other end of described filter capacitor C10 connects the 14th pin and the ground of intelligent chip U2, the 2nd pin of described intelligent chip U2 connects the end of crystal oscillator CX1 and resonant capacitance C7, the other end of described resonant capacitance C7 connects the tie point on resonant capacitance C8 and ground, the other end of described crystal oscillator CX1 then connects the tie point of resonant capacitance C8 and intelligent chip U2 the 3rd pin, the voltage VCC of termination intelligent chip power supply circuits (1) output of described reset resistor R7, the tie point of another termination reset resistor R8 and filter capacitor C9, the other end ground connection of described filter capacitor C9, the other end of described reset resistor R8 then connects the 4th pin of intelligent chip U2, the ON/OFF signal and the 6th of the 5th pin output of described intelligent chip U2,7,8,9,10, the PWMD signal of 11 pin output inserts described led drive circuit (3).

5. the LED street lamp with intelligent delay circuit according to claim 1; it is characterized in that: described led drive circuit (3) comprising: spike absorption diode D1; sustained diode 2; reverse connecting protection diode D3; filter capacitor C1; C2; C4; feedback capacity C3; current sense resistor R1; R5; R6; opening resistor R3; R4; feedback resistance R2; buck inductor L1 and integrated circuit U1; described outside input direct voltage VIN connects the end of described spike absorption diode D1; the negative pole end of reverse connecting protection diode D3; the 8th pin of integrated circuit U1; the end of the positive terminal of filter capacitor C1 and opening resistor R4; the described spike absorption diode D1 other end; the positive terminal of reverse connecting protection diode D3 and the negative pole end ground connection of filter capacitor C1; the other end of described opening resistor R4 connects opening resistor R3; the other end of described opening resistor R3 connects the 6th pin of integrated circuit U1; the end of described filter capacitor C2 connects the 7th pin of integrated circuit U1; other end ground connection; described current sense resistor R1; R5; R6 is connected in parallel; an end in parallel connects the 5th pin of integrated circuit; other end ground connection in parallel; described feedback capacity C3 serial connection feedback resistance R2; the other end of feedback capacity C3 connects the 2nd pin of integrated circuit U1; the other end of feedback resistance R2 connects the tie point of buck inductor L1 and integrated circuit U1 the 1st pin; the other end of described buck inductor L1 connects the negative pole end of sustained diode 2 and the tie point of filter capacitor C4; the positive terminal ground connection of described sustained diode 2; the other end of described filter capacitor C4 connects the 5th pin of integrated circuit U1; the 5th pin of intelligent chip U2 in the described intelligent chip control circuit (2) connects the 6th pin of integrated circuit U1; the 6th of intelligent chip U2; 7; 8; 9; 10; 11 pin connect the 3rd pin of integrated circuit U1, and the 5th pin of the negative pole end of described sustained diode 2 and integrated circuit U1 inserts described LED module (4) respectively.