CN201515524U

CN201515524U - LED fluorescent lamp driving power

Info

Publication number: CN201515524U
Application number: CN2009200609866U
Authority: CN
Inventors: 张文仲
Original assignee: Zhaoqing Duanzhou Jingyu Lighting-Electronics Factory
Current assignee: Zhaoqing Duanzhou Jingyu Lighting-Electronics Factory
Priority date: 2009-07-22
Filing date: 2009-07-22
Publication date: 2010-06-23
Anticipated expiration: 2019-07-22

Abstract

The utility model discloses an LED fluorescent lamp driving power, which comprises an EMI filter circuit module, a full-bridge rectifying circuit module, a power factor correction circuit module and an LED constant-current driving circuit module, wherein the EMI filter circuit module, the full-bridge rectifying circuit module, the power factor correction circuit module and the LED constant-current driving circuit module are sequentially connected with each other, and is characterized in that a control chip in the LED constant-current driving circuit module adopts HV991B; and the EMI filter circuit module is also connected with a surging current protection module. Since the constant-current driving circuit module adopts the HV9910B chip, not only the requirements of the low voltage and the large current can be satisfied, but also the output efficiency is improved; by adopting the surging current protection module, the working circuit is safer and more reliable, and the performance is more stable; and since the power factor correction circuit module is improved, the power factor is further improved, and the current harmonic constitution is reduced.

Description

The LED fluorescent lamp driving power supply

Technical field

The utility model relates to a kind of power circuit, specifically is meant a kind of LED fluorescent lamp driving power supply.

Background technology

In recent years, the kind of LED is constantly added, and performance improves year by year, and the utilization field is more extensive.The internal and external ornament lamp illumination of illumination inside and outside the back lighting of large-screen LCD, automobile, public place illumination, building, the aspects such as beautiful engineering at sight spot, city have obtained very big development.In order to reach bigger brightness and better reliability, great power LED progressively is used.

Because of global energy day is becoming tight, unremitting effort is all being made for seeking novel energy in each countries and regions.Especially relating to huge numbers of families' indoor and outdoor lighting class light source and auxiliary products thereof is subjected to national governments especially and shows great attention to.Because led light source has energy-saving environmental-protection function, whole world All Countries is tried hard to recommend the lighting that led light source constitutes, and as the 4th generation light source replace incandescent lamp, fluorescent lamp and electricity-saving lamp.Our country takes out 4,000,000,000,000 especially and stimulates domestic demand, and wherein, quite a few funds is used as capital construction, and the energy-conserving and environment-protective product that is associated with in the infrastructure just has LED indoor and outdoor lighting light fixture.Yet led light source should constitute different power by some lamp pearl assembled arrangement, satisfies different occasions and uses.Just need specific power supply to export lasting constant electric current and impel the LED lamp luminescence.Because the LED light fixture is an emerging industry, do not have formal standard, but reference is very few.At present, have part producer producing similar products on the market, but the drive circuit of selecting for use does not satisfy customer requirements yet, especially can not output LOW voltage, also there is the problem that delivery efficiency is lower, performance is stable inadequately simultaneously in this specific (special) requirements of electric current greatly.

In addition, along with the continuous development of power electronic technology, increasing switching power unit is widely used in various field, makes Switching Power Supply to the influence of electrical network, and seeming as degradation problem under harmonic pollution and the input power factor becomes increasingly conspicuous.For reducing harmonic pollution and the electromagnetic interference of device, corresponding harmonic suppressing method and circuit of power factor correction have been proposed to electrical network.Circuit of power factor correction generally is divided into Active Power Factor Correction (APFC) and PPFC (Passive Power Factor Correction) (PPFC).Active Power Factor Correction is fit to make high performance Switching Power Supply, but owing to will adopt special chip, cost is higher, is difficult to be applied on the Switching Power Supply of middle low power.Traditional passive alignment technique is to increase the rectifier bridge angle of flow with the LC filter in rectification circuit, improves power factor thereby reduce current harmonics.PPFC (Passive Power Factor Correction) has replaced the higher active device of price owing to components and parts such as adopting inductance, electric capacity, diode, thereby the cost of Switching Power Supply is reduced.But PPFC (Passive Power Factor Correction) also exists such as crest factor and the more high technical problem of harmonic content, and the even-order harmonic problem that exists in particularly traditional passive power factor correcting circuit is so it is badly in need of further improving.

The utility model content

The purpose of this utility model is to provide a kind of stable performance, delivery efficiency height, safe and reliable and improved power factor and reduced the LED fluorescent lamp driving power supply of current harmonics.

To achieve these goals, the technical solution adopted in the utility model is: the LED fluorescent lamp driving power supply, include EMI filter circuit module, full bridge rectifier module, circuit of power factor correction module, LED constant-current drive circuit module, described EMI filter circuit module, full bridge rectifier module, circuit of power factor correction module, LED constant-current drive circuit module connect successively, it is characterized in that: control chip used in the described LED constant-current drive circuit module adopts HV9910B.

Described circuit of power factor correction module is made up of electric capacity and three diodes of two parallel connections, this module discharges and recharges the angle of flow that has increased rectification circuit diode in the full bridge rectifier module by shunt capacitance, thereby improve power factor and reduce the current harmonics composition, particularly eliminate the even-order harmonic problem that exists in the passive power factor correcting circuit.

Also be connected with the surge current protection module that constitutes with fuse, resistance on the described EMI filter circuit module, fuse and resistance can effectively stop the destruction of surge current to the circuit elements device, and power supply is played the certain protection effect.

The operating voltage input VIN of chip HV9910B in the described LED constant-current drive circuit module draws corner connection a voltage stabilizing didoe BZX85C47, GATE among the chip HV9910B draws corner connection metal-oxide-semiconductor field effect transistor IRF840, is connected to backward channel diode SF38 in the drain electrode of described metal-oxide-semiconductor field effect transistor IRF840.

The beneficial effects of the utility model: because used control chip adopts HV9910B in the LED constant-current drive circuit module, not only satisfy low-voltage, the requirement of big electric current, but also improved delivery efficiency; Owing to adopt the surge current protection module, in the time of effectively preventing unexpected overheated, short circuit and open circuit phenomenon to occur because of Circuits System, and the phenomenon that causes burning circuit and burning load takes place, and makes the operating circuit safety and reliability, and performance is more stable; Because the circuit of power factor correction module has been done improvement, further improved power factor and reduced the composition of current harmonics.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a power supply block diagram of the present utility model;

Fig. 2 is an electrical schematic diagram shown in Figure 1.

Among the figure: 1, surge current protection module; 2, EMI filter circuit module; 3, full bridge rectifier module; 4, circuit of power factor correction module; 5, LED constant-current drive circuit module.

Embodiment

As shown in Figure 1 and Figure 2, the LED fluorescent lamp driving power supply, include EMI filter circuit module 2, full bridge rectifier module 3, circuit of power factor correction module 4, LED constant-current drive circuit module 5, described EMI filter circuit module 2, full bridge rectifier module 3, circuit of power factor correction module 4, LED constant-current drive circuit module 5 connect successively, and control chip used in the described LED constant-current drive circuit module 5 adopts HV9910B.Chip HV9910B adopts (off-time) pattern of constant turn-off time, its operating voltage input VIN draws corner connection a voltage stabilizing didoe BZX85C47, GATE among the chip HV9910B draws corner connection metal-oxide-semiconductor field effect transistor IRF840, is connected to backward channel diode SF38 in the drain electrode of described metal-oxide-semiconductor field effect transistor IRF840.Circuit of power factor correction module 4 is made up of capacitor C 4, C5 and three diode D5, D6, D7 of two parallel connections.Also be connected with the surge current protection module 1 that constitutes with fuse FUSE, resistance R 1 on the EMI filter circuit module 2.

Chip HV9910B has following characteristics:

A, it can (85～265VAC) power supplies also can be with 12～24VDC (or 48VDC) storage battery or solar cell for supplying power with international civil power; The direct voltage scope of B, input is extremely wide, is 8～450V; The constant-current driving current range of C, output is extremely wide, to more than the 1A, can drive low-power LED from tens mA, also can drive great power LED; D, it can form buck, lifting/lowering pressure type framework easily, to satisfy the demand of different power voltage; E, it can drive 1 LED to up to a hundred LED; F, power output are from several watts to tens watts.

Except above-mentioned versatility characteristics, this driving governor also has following characteristics.

● the conversion efficiency height can reach 85%～90%;

● the drive circuit of composition is basic, and peripheral component is few, and it is little not only to account for the PCB area, and production cost is low;

● there is the linear voltage regulator that can import 450VDC high pressure, output 7.5V inside.Need not external dropping resistor, make circuit more basic, and the exportable electric current of making analog light-adjusting circuit;

● two kinds of mode of operations are arranged: constant frequency pattern and (off-time) pattern of constant turn-off time;

● switching frequency is set by the user (the resistance R T of an external setpoint frequency);

● two kinds of dimming modes are arranged: simulation dimming mode and PWM dimming mode;

● the output driving current size is set with a peripheral hardware resistance R CS.

The drive circuit that this LED driving governor is formed equally also is applicable to battery-driven automobile is inside and outside and throws light on and the occasion (navigation light, street lamp etc.) of identification light (turning, fork truck, reversing) or solar cell for supplying power except that mainly applying to high-powered LED lamp that mains-supplied drives a plurality of series connection.

LED fluorescent lamp driving power supply main feature of the present utility model is as follows:

1, exchange input: 110/220VAC (50～60Hz);

2, power output: 〉=3W-120W;

3, high efficiency: 〉=85%, low no-load power consumption≤300mW;

4, High Power Factor: 〉=0.91 (110～260VAC);

5, high constant current output precision 20～1000mA≤± 2% (capable of regulating);

6, total harmonic distortion≤20%;

7, output current: constant current output 1000mAmax, can adjust with LED lamp string number;

8, output overcurrent, open-circuit-protection;

9, high power, low temperature rise, lower calorific value;

10, there are not high frequency audible noise, flicker free;

11, circuit design novelty, cost performance height;

12, stable and reliable for performance, long service life; 13, physical dimension can be changed with customer requirements.

Claims

1. LED fluorescent lamp driving power supply, include EMI filter circuit module (2), full bridge rectifier module (3), circuit of power factor correction module (4), LED constant-current drive circuit module (5), described EMI filter circuit module (2), full bridge rectifier module (3), circuit of power factor correction module (4), LED constant-current drive circuit module (5) connect successively, it is characterized in that: control chip used in the described LED constant-current drive circuit module (5) adopts HV9910B.

2. LED fluorescent lamp driving power supply according to claim 1 is characterized in that: described circuit of power factor correction module (4) is made up of electric capacity (C4, C5) and three diodes (D5, D6, D7) of two parallel connections.

3. LED fluorescent lamp driving power supply according to claim 1 is characterized in that: also be connected with the surge current protection module (1) that constitutes with fuse (FUSE), resistance (R1) on the described EMI filter circuit module (2).

4. LED fluorescent lamp driving power supply according to claim 1, it is characterized in that: the operating voltage input VIN of the chip HV9910B in the described LED constant-current drive circuit module (5) draws corner connection a voltage stabilizing didoe BZX85C47, GATE among the chip HV9910B draws corner connection metal-oxide-semiconductor field effect transistor IRF840, is connected to backward channel diode SF38 in the drain electrode of described metal-oxide-semiconductor field effect transistor IRF840.