CN102088812A

CN102088812A - Power supply drive module device for LED (light-emitting diode) general illumination

Info

Publication number: CN102088812A
Application number: CN2011100583139A
Authority: CN
Inventors: 程玉华
Original assignee: SUZHOU ZHUONENG MICROELECTRONIC TECHNOLOGY Co Ltd
Current assignee: SUZHOU ZHUONENG MICROELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2011-03-11
Filing date: 2011-03-11
Publication date: 2011-06-08

Abstract

The invention provides a power supply drive module device for LED (light-emitting diode) general illumination. The device can drive a plurality of smaller-power LED lighting modules at the same time; and lighting demands for different power grades can be realized by means of configuring the drive capability of a prime power factor correction (PFC) module and the number of the LED lighting modules. The power supply device comprises a plurality of LED lighting module interfaces and the PFC module, wherein, the LED lighting modules are connected via the interfaces; and the PFC module is used for correcting the power of the plurality of connected LED lighting modules, and the grade of output power can be adjusted.

Description

The power supply of LED general illumination drives die set

Technical field

The present invention relates to the LED field, relate in particular to the power supply that is used for the LED general illumination and drive die set.

Background technology

Led moduleization is the trend of high-power LED illumination development, its target is exactly design and produces the LED module of unified standard, as shown in Figure 1, the mode that is different from current LED lighting design, the LED module is with light source, thermal component, driving power synthesis module, produce in batches, produce standardized LED illuminating product, have cost, reliability and advantages such as easy assembling, easy replacement by mould.

The main aspect that the LED module is used is the LED street lamp, with the street lamp is example, a high-power LED street lamp can be formed by a plurality of lower-powered modules, if module power is 20W, if street lamp needs 100W, then get final product with five modules, in such application, each module all has independent power supply, directly be connected on the AC bus and just can work, for the consideration of application demand and cost, the power factor of power supply can be very not high in the module, the LED street lamp overall power factor that a plurality of modules form can be lower, and can't satisfy the requirement of whole LED street lamp has the very requirement of High Power Factor.

Summary of the invention

The invention provides the power supply that is used for the LED general illumination and drive die set, to improve LED light fixture overall power factor.This device can also drive the LED illumination module of a plurality of smaller powers simultaneously, by the driving force of configuration prime power factor correction module and the quantity of LED illumination module, can realize the lighting demand of different capacity grade, this supply unit comprises: a plurality of LED illumination module interfaces are used to insert the LED illumination module; The Active PFC module is used to proofread and correct the power of a plurality of LED illumination module of access, and the power grade of its output can be adjusted.This Active PFC module can improve the power factor (PF) of whole LED application luminaire.

Description of drawings

Fig. 1 is the structural representation of the LED illumination module of the embodiment of the invention;

Fig. 2 is the power device structure schematic diagram that has connected LED module power supply in the embodiment of the invention;

Fig. 3 is the LED module power supply architecture schematic diagram of the embodiment of the invention;

Fig. 4 is the inductive current waveform schematic diagram of the LED module power supply of the embodiment of the invention.

Embodiment

At the described problem of background technology, present embodiment is provided with the Active PFC module in supply unit, can improve whole power output factor, and this supply unit has a plurality of LED illumination module interfaces, present embodiment is a kind of supply unit that is used for the LED illumination module, this device can drive the LED illumination module of a plurality of smaller powers simultaneously, by the driving force of configuration prime power factor correction module and the quantity of LED illumination module, can realize the lighting demand of different capacity grade.

This supply unit comprises: a plurality of LED illumination module interfaces are used to insert the LED illumination module; The Active PFC module is used to proofread and correct the power of a plurality of LED illumination module of access, and the power grade of its output can be adjusted.This Active PFC module can improve the power factor (PF) of whole LED application luminaire.

Provide a kind of concrete enforcement structure of supply unit below:

As shown in Figure 2, be connected with the supply unit of module power supply for present embodiment, this device 100 includes power factor correction module 110 and LED module power module 120, whole supply unit is general alternating voltage input, so power factor correction module 110 includes: EMI filter unit 111, rectifier bridge 12a-d, input filter capacitor 113, Inductive component 116, output rectifier diode 118, power switch pipe 115, current sense resistor 114, power factor correction controller 117, output filter capacitor 119, wherein Inductive component 116, output rectifier diode 118, power switch pipe 115, current sense resistor 114 constitutes booster circuit, effect is the high-voltage DC power supply that will be converted to through the AC power of EMI filter unit 111 and rectifier bridge 12a-d about 400V, the effect of input filter capacitor 113 is to voltage filter after the rectification, the effect of output filter capacitor 119 is to the filtering of output high voltage source, the effect of pfc controller 117 is the duty ratios of regulating power switch pipe 115, the input voltage of different value is converted to the high-voltage dc voltage of identical value, through after the power factor correction module 110, the power factor of power supply is more than 0.9, and output voltage ripple voltage peak-to-peak value is directly imported as LED module power module 120 less than 110 outputs of 10V power factor correction module.

LED module power module 120 includes LED module power supply 121a-121n, and each LED module output power of power supply is 30W, and the output that is directly connected to factor correcting module 110 just can be worked, thereby lights the led light source in the LED module.

As shown in Figure 3, LED module power source design for present embodiment, this module power supply 200 is the driving power among Fig. 1, also as LED module power supply 121a among Fig. 2, include input filter capacitor 201, inductance 205, rectifier diode 202, power switch pipe 203, current sense resistor 204, Buck controller 206, wherein inductance 205, rectifier diode 202, power switch pipe 203, current sense resistor 204 is formed buck configuration, effect is that the output high-tension electricity potential source with power factor correction module 110 is converted to the low source, the direct driving LED light source of whole module so can be realized the illumination functions of whole LED module.The reduction voltage circuit that is different from other, this step-down module is operated in degree of depth continuous current mode, does not need output capacitance in this module, utilizes inductance as current source, thereby can prolong the life-span of power supply.Inductance 205 current waveforms as shown in Figure 4,1 is inductive current peak, 2 is the inductive current waveform, 3 is inductive current mean value, 6 is the inductive current minimum value, and 4 is 203 turn-off times of power tube, and 5 is power tube 203 ON time, be in for 5 stages, inductive current increases, inductive energy storage; Be in for 4 stages, inductive current reduces, and inductance releases energy, and the electric current that flows through inductance 205 is the electric current that flows through LED300.When constant power pipe switching frequency, the slope that inductive current descends is Vo/L, and wherein L is 205 inductance value, V _OBe the pressure drop of LED300, inductive current mean value is the mean value of inductive current peak and inductive current minimum value, in application, as long as configuration switch frequency, inductive current maximum and inductance value, just can determine inductive current mean value, as can be seen from the figure, inductive current is continuous.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. a power supply that is used for the LED general illumination drives die set, it is characterized in that, comprising:

A plurality of LED illumination module interfaces are used to insert the LED illumination module;

The Active PFC module is used to proofread and correct the power of a plurality of LED illumination module of access, and the power grade of its output can be adjusted.

2. supply unit as claimed in claim 1 is characterized in that, described Active PFC module can according to LED throw light on required power grade adjust self output power grade.

3. supply unit as claimed in claim 1 is characterized in that, the module power supply that described LED illumination module adopts is the voltage-dropping type structure.

4. supply unit as claimed in claim 1 is characterized in that, described LED illumination module interface has two outputs, is used for connecting two incoming ends of LED illumination module module power supply.

5. supply unit as claimed in claim 1 is characterized in that, described Active PFC module specifically comprises:

The EMI filter unit is in order to carry out EMI filtering to input signal;

Rectification unit is in order to the input signal rectification;

Input filter capacitor is in order to the signal filtering after the rectification;

The PFC booster circuit is in order to boost to high-voltage dc signal with voltage of signals after the rectification;

Pfc controller is in order to control PFC booster circuit;

Output filter capacitor is in order to the high-voltage dc signal filtering to the output of PFC booster circuit.