CN201282579Y

CN201282579Y - Driving power of LED lamp

Info

Publication number: CN201282579Y
Application number: CNU2008201363483U
Authority: CN
Inventors: 范利; 杜建朝
Original assignee: BEIJING BADACHU AOBO SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: BEIJING BADACHU AOBO SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2008-09-23
Filing date: 2008-09-23
Publication date: 2009-07-29
Anticipated expiration: 2018-09-23

Abstract

The utility model relates to a power supply for driving an LED lamp, which comprises an AC/DC converter module, a DC/DC converter module, a single chip microcomputer, and a series load output module. The AC/DC converter module has one end thereof connected with an external power supply and the other end thereof connected with the DC/DC converter module via a wire; the DC/DC converter module has five wires extending out of the module; the single chip microcomputer is connected with the DC/DC converter module via three wires; and the series load output module comprises three series loads including LED I, LED II and LED III, each of which is connected with a load sensing circuit in parallel. The power supply supplies power to loads with 1 second time delay generated by the single chip microcomputer, so as to avoid impact on the LED loads at the moment of starting up; realizes energy-saving control; and arranges load sensing circuits, so as not to impact on normal working of other lamps in case that one of the lamps fails.

Description

The LED lamp driving power source

Technical field

The utility model relates to a kind of LED lamp driving power source.

Background technology

Modern society, energy-conserving and environment-protective have become the topic that people more and more pay close attention to, LED is strong with safe, less energy consumption, applicability, can be multicolor luminous, advantage such as antidetonation, life-span length, environmental protection, response speed be fast as new type light source more and more widely in the application of lighting field, the power supply of performance but the LED lamp is also had relatively high expectations simultaneously could guarantee the operate as normal of LED; What occur in early days is the serial LED Switching Power Supply, and its main circuit topology and linear power supply are similar, but power transistor works on off state.Power circuit is connected with the LED load, traditional way is that switch transformer adopts 3 windings, every group of independently-powered LED that gives, but because LED needs the constant current power supply, just every group all add a constant current control chip, and the conversion efficiency of constant current chip is 90% at present, and general switch power efficiency is 85% such words, calculates efficient, it is very low that actual efficiency=85%*90%=76.5% can fall, and adopt when connecting, after a lamp broke down, other lamp can not normally use.

The utility model content

The purpose of this utility model provides a kind of LED lamp driving power source, the deficiency that other lamp can not normally use after existing LED lamp power supply service efficiency was low to overcome, a lamp breaks down.

The purpose of this utility model is to be achieved through the following technical solutions:

A kind of LED lamp driving power source comprises AC/DC modular converter, DC/DC modular converter, single-chip microcomputer and load series connection output module, and described AC/DC modular converter one end is connected with external power supply, and the other end is connected with the DC/DC modular converter by lead; Described DC/DC modular converter has five leads to extend to module-external, wherein a lead is connected with the AC/DC modular converter, wherein three leads are connected to the two ends of single-chip microcomputer, and a remaining lead directly is connected with a connect end of output module of load; The described load series connection output module other end links to each other with a lead of DC/DC modular converter output, and described load series connection output module comprises three series load LED I, LED II, LEDIII, each LED load load detecting circuit all in parallel; Described single-chip microcomputer is connected by three leads with the DC/DC modular converter, and single-chip microcomputer one end is connected with load series connection output module; One end of load series connection output module links to each other with the lead of single-chip microcomputer output.

The beneficial effects of the utility model are: use single-chip microcomputer, produce time-delay in 1 second and power to the load the impact of moment to load LED of avoiding starting shooting; Realize Energy Saving Control simultaneously; Increase load detecting circuit, when one of them lamp goes wrong, do not influenced the operate as normal of other lamps.

Description of drawings

Fig. 1 is the circuit block diagram of LED lamp driving power source described in the utility model;

Fig. 2 is the load series connection output module circuit diagram of LED lamp driving power source described in the utility model.

Among the figure:

1, AC/DC modular converter; 2, DC/DC modular converter; 3, single-chip microcomputer; 4, load series connection output module; 5, lead; 11, external power supply; 41, LED I; 42, LED II; 43, LEDIII; 44, load detecting circuit.

Embodiment

Shown in Fig. 1-2, a kind of LED lamp driving power source described in the utility model, comprise AC/DC modular converter 1, DC/DC modular converter 2, single-chip microcomputer 3 and load series connection output module 4, described AC/DC modular converter 1 one ends are connected with external power supply 11, the other end is connected with DC/DC modular converter 2 by lead 5, and AC/DC modular converter 1 major function is that the alternating current 220V of input is converted to direct current 310V; Described DC/DC modular converter 2 has five leads 5 to extend to module-external, wherein a lead 5 is connected with AC/DC modular converter 1, for DC/DC modular converter 2 provides the electric current support, wherein three leads 5 are connected to the two ends of single-chip microcomputer 3, a remaining lead 5 directly is connected with an end of load series connection output module 4, and 2 effects of DC/DC modular converter are constant pressure and flow control; Described load series connection output module 4 other ends link to each other with a lead 5 of DC/DC modular converter 2 outputs, described load series connection output module 4 comprises three series load LED I 41, LED II 42, LEDIII 43, each LED load load detecting circuit 44 all in parallel, when load detecting circuit 44 breaks down at load LED41, with the LED41 short circuit; Described single-chip microcomputer 3 is connected by three leads 5 with DC/DC modular converter 2, and lead 5 of single-chip microcomputer 3 one ends output is connected with load series connection output module 4, and single-chip microcomputer 3 can be realized the time-delay and the Energy Saving Control in 1 second.

During concrete operations, after connecting AC power supplies, power supply is started working, output 72VDC voltage, since single-chip microcomputer 3 controls, the not direct supply load of this voltage, but power to the load through time-delay in 1 second, avoid starting shooting moment to the impact of load LED, the voltage on each lamp is that the utility model has increased load detecting circuit about 20V, when load detecting circuit breaks down at load LED I 41, with LED I 41 short circuits, whole circuit is connected, owing to be the constant current power supply, so electric current is constant, whole output voltage is downward modulation and then, and all the other LED damage, and reason also is like this.

Claims

1, a kind of LED lamp driving power source, it is characterized in that: comprise AC/DC modular converter (1), DC/DC modular converter (2), single-chip microcomputer (3) and load series connection output module (4), described AC/DC modular converter (1) one end is connected with external power supply (11), and the other end is connected with DC/DC modular converter (2) by lead (5); Described DC/DC modular converter (2) has five leads (5) to extend to module-external, wherein a lead (5) is connected with AC/DC modular converter (1), wherein three leads (5) are connected to the two ends of single-chip microcomputer (3), and a remaining lead (5) directly is connected with an end of load series connection output module (4); Described load series connection output module (4) other end links to each other with a lead (5) of DC/DC modular converter (2) output, described load series connection output module (4) comprises three series load LEDI (41), LED II (42), LED III (43), each LED load load detecting circuit (44) all in parallel; Described single-chip microcomputer (3) is connected by three leads (5) with DC/DC modular converter (2), and single-chip microcomputer (3) one ends are connected with load series connection output module (4); One end of load series connection output module (4) links to each other with the lead (5) of single-chip microcomputer (3) output.