CN202634805U

CN202634805U - LED fluorescent lamp power supply

Info

Publication number: CN202634805U
Application number: CN2012202205591U
Authority: CN
Inventors: 彭孟展
Original assignee: Shenzhen Driver-Led Lighting Co Ltd
Current assignee: Shenzhen Driver-Led Lighting Co Ltd
Priority date: 2012-05-16
Filing date: 2012-05-16
Publication date: 2012-12-26
Anticipated expiration: 2022-05-16

Abstract

The utility model provides an LED fluorescent lamp power supply, which comprises an electromagnetic compatibility module, a first rectifying and filtering module, a transformer, a pulse width modulation and power factor correction main control module, a clamping circuit protection module and a second rectifying and filtering module, wherein the electromagnetic compatibility module, the first rectifying and filtering module, the clamping circuit protection module and the transformer are respectively and electrically connected with the second rectifying and filtering module, and the pulse width modulation and power factor correction main control module is electrically connected with the first rectifying and filtering circuit and the clamping circuit protection module. The LED fluorescent lamp power supply has the advantages of low cost, strong stability and reliability, simple circuit structure, and good pulse frequency performance of the power supply.

Description

A kind of LED daylight lamp power source

Technical field

The utility model relates to field of power supplies, is meant a kind of LED daylight lamp power source especially.

Background technology

The LED daylight lamp power source is a kind of of LED driving, and it is most important parts in the LED fluorescent lamp, and it is improper to select, and the LED fluorescent lamp can not have been given play to performance, even can not normally use.

The LED daylight lamp power source of existing market all adopts traditional single stage PFC, and (the English full name of PFC is " Power Factor Correction "; The meaning is " power factor correction "; Power factor refers to the relation between effective power and the total power consumption, and just effective power is divided by the ratio of total power consumption; Basically power factor (PF) can be weighed the degree that electric power is used effectively, and when the power factor (PF) value is big more, represents its electric power utilance high more.) technical application, as adopting the ST26562 chip, the shortcoming that this technology exists is the peripheral circuit complex structure; The fault point is many; Any result who is peripheral circuit breaks down, and just makes LED daylight lamp power source cisco unity malfunction, and this LED fluorescent lamp source is with high costs.

In addition, a kind of LED daylight lamp power source also commonly used on the market is non-isolation daylight lamp power source, and the peripheral circuit of this scheme is also complicated, and the impulse current when load LED is started is big, and it is because be non-isolation scheme, causes the radiator electric leakage easily, and is dangerous.

The utility model content

The utility model proposes a kind of LED daylight lamp power source, has solved the baroque problem of LED daylight lamp power source peripheral circuit in the prior art, has simplified peripheral circuit, has improved the stability and the reliability of LED daylight lamp power source, has reduced cost.

The technical scheme of the utility model is achieved in that

A kind of LED daylight lamp power source comprises electromagnetic compatibility module, first rectification filtering module, transformer, pulse width modulation and power factor correction main control module, clamped circuit protection module and second rectification filtering module;

Said electromagnetic compatibility module, said first rectification filtering module, said clamped circuit protection module, said transformer and second rectification filtering module electrically connect successively;

Said pulse width modulation and power factor correction main control module electrically connect said first current rectifying and wave filtering circuit and said clamped circuit protection module.The utilization that cooperates of said pulse width modulation and power factor correction main control module and said transformer reduces cost greatly, improves and the perfect pulse frequency performance of LED daylight lamp power source.

Further, said clamped circuit protection module is the metal oxide layer semiconductor field-effect transistor.The use of said metal oxide layer semiconductor field-effect transistor has been played the better protection effect to circuit.

Further, said pulse width modulation and power factor correction main control module comprise chip, electric capacity, resistance, diode, triode and a plurality of node;

Said electric capacity comprises first electric capacity, second electric capacity, the 3rd electric capacity and the 4th electric capacity; Said resistance comprises first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance;

Said chip comprises first pin, second pin, the 3rd pin, the 4th pin, the 5th pin, the 6th pin, the 7th pin and the 8th pin;

Said diode comprises first diode and second diode;

Said node comprises first node, second node, the 3rd node, the 4th node and the 5th node.

Further, said first electric capacity and said second electric capacity are connected in parallel, one of which end ground connection, and its other end electrically connects through said first node and said the 7th pin;

Said the 8th pin is electrically connected to said first resistance, and said second resistance and said the 3rd resistance is connected in parallel, one of which end ground connection, and its other end is connected in series through said second node and said first resistance;

Said the 4th resistance and said first diode are connected in parallel, and the one of which end is connected on the said clamped circuit protection module through said triode, and its other end is electrically connected on said first pin through said the 3rd node;

Said the 4th pin is connected to said the 3rd electric capacity one end; Said the 5th resistance and said the 4th electric capacity are connected in parallel; The one of which end is connected in series through the 4th node and said the 3rd electric capacity other end, and its other end is electrically connected to said the 6th pin through the 5th node;

Said the 5th pin is electrically connected to said first rectification filtering module;

Said second pin and said the 3rd pin are electrically connected to said the 4th node;

Electrically connect said the 6th resistance, said second diode and said the 7th resistance between said the 5th node and said first node successively;

Said second node and said triode electrically connect.

The utility model LED daylight lamp power source adopts said pulse width modulation and power factor correction main control module to make; A plurality of functions are combined; Thereby simplified peripheral circuit; Improve the stability and the reliability of LED daylight lamp power source, improved the performance indication of power supply, and circuit structure has simply reduced cost.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structured flowchart of the utility model LED daylight lamp power source;

Fig. 2 is the circuit diagram of the utility model LED daylight lamp power source.

Embodiment

To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

With reference to Fig. 1 and Fig. 2, the utility model LED daylight lamp power source 1 comprises electromagnetic compatibility module 2, first rectification filtering module 3, transformer 4, pulse width modulation and power factor correction main control module 5, clamped circuit protection module 6 and second rectification filtering module 7; Said electromagnetic compatibility module 2, said first rectification filtering module 3, said clamped circuit protection module 6, said transformer 4 all electrically connect with second rectification filtering module 7, and said pulse width modulation electrically connects said first current rectifying and wave filtering circuit 3 and the said clamped circuit protection module 6 with power factor correction main control module 5.Pulse width modulation; It is the abbreviation of English " Pulse Width Modulation "; Be called for short pulse-width modulation; Be to utilize the numeral of microprocessor to export a kind of very effective technology that analog circuit is controlled, be widely used in from many fields of measurement, the power of communicating by letter control and conversion.Power factor correction is exactly distortion current to be proofreaied and correct be sinusoidal current, and makes it and the voltage same-phase, thereby makes power factor approach 1.The utilization that cooperates of said pulse width modulation and power factor correction main control module and said transformer; Simplified peripheral circuit; So reduced owing to peripheral circuit breaks down and caused the out-of-work probability of LED daylight lamp power source, raising and the perfect pulse frequency performance of LED daylight lamp power source.

Corresponding module is the same in the circuit of said electromagnetic compatibility module 2, said first rectification filtering module 3, said clamped circuit protection module 6 and said second rectification filtering module 7 and operation principle and the prior art, so get final product with reference to associated description of the prior art.

Preferably, said clamped circuit protection module 6 is the metal oxide layer semiconductor field-effect transistor.The metal oxide layer semiconductor field-effect transistor, (Metal-Oxide-Semiconductor Field-Effect Transistor MOSFET) is a kind of field-effect transistor that can be widely used in analog circuit and digital circuit to be called for short metal-oxide half field effect transistor.

Preferably, with reference to Fig. 2, said pulse width modulation and power factor correction main control module 5 comprise chip (not shown), electric capacity (not shown), resistance (not shown), diode (not shown), triode Q and a plurality of node; Said electric capacity comprises first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3 and the 4th capacitor C 4; Said resistance comprises first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6 and the 7th resistance R 7; Said chip comprises first pin 8, second pin 9, the 3rd pin 10, the 4th pin 11, the 5th pin 12, the 6th pin 13, the 7th pin 14 and the 8th pin 15; Said diode comprises the first diode D1 and the second diode D2; Said node comprises first node 16, second node 17, the 3rd node 18, the 4th node 19 and the 5th node 20.Said first capacitor C 1 is connected in parallel with said second capacitor C 2, one of which end ground connection, and its other end electrically connects through said first node 16 and said the 7th pin 14; Said the 8th pin 15 is electrically connected to said first resistance R 1, and said second resistance R 2 is connected in parallel with said the 3rd resistance R 3, one of which end ground connection, and its other end is connected in series with said first resistance R 1 through said second node 17; Said the 4th resistance R 4 is connected in parallel with the said first diode D1, and the one of which end is connected on the said clamped circuit protection module 6 through said triode Q, and its other end is electrically connected on said first pin 8 through said the 3rd node 18; Said the 4th pin 11 is connected to said the 3rd capacitor C 3 one ends; Said the 5th resistance R 5 is connected in parallel with said the 4th capacitor C 4; The one of which end is connected in series with said the 3rd capacitor C 3 other ends through the 4th node 19, and its other end is electrically connected to said the 6th pin 13 through the 5th node 20; Said the 5th pin 12 is electrically connected to said first rectification filtering module 3; Said second pin 9 is electrically connected to said the 4th node 19 with said the 3rd pin 10; Electrically connect said the 6th resistance R 6, the said second diode D2 and said the 7th resistance R 7 between said the 5th node 20 and said first node 16 successively; Said second node 17 electrically connects with said triode Q.

Preferably, all components and parts of the utility model LED daylight lamp power source all are arranged in the top layer of circuit board.

The utility model LED daylight lamp power source adopts said pulse width modulation and power factor correction main control module to make; A plurality of functions are combined; Thereby simplified peripheral circuit; Improve the stability and the reliability of LED daylight lamp power source, improved the performance indication of power supply, and circuit structure has simply reduced cost; In addition, all components and parts all are arranged in the top layer of PCB, and such Butut technology helps simplifying and cuts pin technology, and the user directly unifies to cut pin and gets final product on circuit board, thereby reduces production costs.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.

Claims

1. a LED daylight lamp power source is characterized in that, comprising:

Electromagnetic compatibility module, first rectification filtering module, transformer, pulse width modulation and power factor correction main control module, clamped circuit protection module and second rectification filtering module;

Said electromagnetic compatibility module, said first rectification filtering module, said clamped circuit protection module, said transformer all electrically connect with said second rectification filtering module;

Said pulse width modulation and power factor correction main control module electrically connect said first current rectifying and wave filtering circuit and said clamped circuit protection module.

2. LED daylight lamp power source as claimed in claim 1 is characterized in that, said clamped circuit protection module is the metal oxide layer semiconductor field-effect transistor.

3. LED daylight lamp power source as claimed in claim 1 is characterized in that, said pulse width modulation and power factor correction main control module comprise chip, electric capacity, resistance, diode, triode and a plurality of node;

Said electric capacity comprises first electric capacity, second electric capacity, the 3rd electric capacity and the 4th electric capacity;

Said resistance comprises first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance; Said chip comprises first pin, second pin, the 3rd pin, the 4th pin, the 5th pin, the 6th pin, the 7th pin and the 8th pin;

Said diode comprises first diode and second diode;

4. LED daylight lamp power source as claimed in claim 3 is characterized in that, said first electric capacity and said second electric capacity are connected in parallel, one of which end ground connection, and its other end electrically connects through said first node and said the 7th pin;

Said second node and said triode electrically connect.