CN205213105U - LED drive power supply goes ripple module - Google Patents

Abstract

The utility model provides a LED drive power supply goes ripple module, including four ports, be power supply port V+ respectively, LED current terminal mouth LE, current detection port CS and ground port G still have stroboscopic chip U1, go stroboscopic chip U1 to have VIN pin (1), GND pin (2), VC pin (3), VG pin (4), VS pin (5) and VLMT pin (6), power supply port V+ connecting resistance R2, resistance R2 connect electric capacity C1 and VIN pin (1), and GND pin (2) are connected with earthing terminal (0), and VC pin (3) are connecting resistance R3 and electric capacity C3 respectively, and VG pin (4) are connected with electric capacity C2 and are connected with MOS pipe Q1, MOS pipe Q1 is connected with resistance R5 and LED current terminal mouth LE, and VS pin (5) are connected with current detection port CS, and VLMT pin (6) are connected with resistance R1, resistance R1 connects MOS pipe Q1. This kind of structure need not change original circuit, need not increase power supply size again, and production is nimble convenient, can adapt to customer's requirement better to the competitiveness that improves production efficiency and improve the product.

Description

LED drive power goes ripple module

Technical field

The utility model relates to LED drive power technical field, goes ripple module in particular to a kind of LED drive power.

Background technology

Make a general survey of current LED power market, LED power is divided by power factor and is mainly divided into two large classes: High Power Factor and low power factor, but this two classes power pin cuts both ways concerning LED load.

The LED power of low power factor is connected to bulky capacitor filtering due to input, therefore the ripple voltage exported is very little, the stroboscopic of LED is also very little even close to not having, LED lamp without stroboscopic can not make people come over dizzy, the eyes that can also reduce works long hours simultaneously brings are uncomfortable, but the bulky capacitor of input is while minimizing stroboscopic, also power factor can be made to reduce, the power supply of low power factor not only can accelerate the loss of circuit, also can increase the burden of supply transformer, the conveying capacity of whole electrical network and power grid quality are weakened greatly.The LED power of High Power Factor but follows the on the contrary of low power factor, the LED power of High Power Factor due to power factor high, the cost of circuit wire diameter can also be reduced while alleviating electrical network burden, but its output voltage ripple is very large, although its stroboscopic imperceptible of the LED naked eyes with High Power Factor, but use can make eyes feel exhausted for a long time, affects the health of eyes.

Therefore in order to protect the eye health of user, improving product competitiveness, needing the structure for the LED power of High Power Factor to carry out Curve guide impeller and control its stroboscopic.Be in the patent document of CN201420695017.9 " a kind of without stroboscopic LED lamp tube driving power " by name in Chinese Patent Application No., disclose a kind of without stroboscopic LED lamp tube driving power, it is characterized in that, comprise the fuse, surge absorbing circuit, EMI anti-jamming circuit, bridge rectifier, PWM chip governor circuit, high frequency transformer reduction voltage circuit and the diode rectification filter circuit that connect successively, AC civil power inputs through fuse, exports a stable current/voltage finally by diode rectification filter circuit.But this design can only be applied in the application example of specific standard, cannot be directly general in other LED drive power by the effect of going ripple to reach without stroboscopic, as customer demand change, the product of other specifications be produced, must redesign and produce, enterprise's production cost is higher.

So design a kind of can be common to the LED drive power of different size go ripple module, can effectively save design cost and production cost, improving production efficiency, there is significant practical value.

Utility model content

The utility model provides a kind of LED drive power to go ripple module, and solving the driving power with ripple function of different size in prior art needs specialized designs, and element cannot be general, and the problem such as longer consuming time is produced in design.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: LED drive power goes ripple module, comprise four ports, be respectively power supply port V+, LED current port LE, current detecting port CS and ground port G, also there is stroboscopic chip U1, the described stroboscopic chip U1 that goes has VIN pin (1), GND pin (2), VC pin (3), VG pin (4), VS pin (5) and VLMT pin (6), described power supply port V+ contact resistance R2, resistance R2 connects electric capacity C1 and VIN pin (1), GND pin (2) is connected with earth terminal 0, VC pin (3) is contact resistance R3 and electric capacity C3 respectively, VG pin (4) is connected with electric capacity C2 and is connected with metal-oxide-semiconductor Q1, described metal-oxide-semiconductor Q1 is connected with resistance R5 and LED current port LE, VS pin (5) is connected with current detecting port CS, and VLMT pin (6) is connected with resistance R1, described resistance R1 connects metal-oxide-semiconductor Q1.

Further, described electric capacity C1, earth terminal (0), resistance R3, electric capacity C3, electric capacity C2 and resistance R5 all connect grounding ports G.

Further, electric capacity C2 is filter capacitor.

Further, described LED drive power goes ripple module installation in a pcb board, and described pcb board has external pin.

The utility model is mainly according to the ripple amplitude of output voltage, make metal-oxide-semiconductor Q1 become a dynamic electric resistor by the dynamic adjustments of stroboscopic chip U1, ripple Larger Dynamic resistance is just large, and the little dynamic electric resistor of ripple is just little, LED electrical pressure is maintained a relatively stable state, thus obtains less output ripple.

The beneficial effects of the utility model: as long as be provided with the LED power of the High Power Factor of module slot, can use this to go ripple module.As client needs the high power factor direct current power supply without stroboscopic, on the basis of original high power factor direct current power supply, the slot of module alignment with mark is plugged during production, neither need to change original circuit, do not need again to increase power volume, produce flexible, the more important thing is the requirement that can adapt to client better, as client does not need ripple function also can not install this module, reduce the cost of LED drive power, thus enhance productivity and improve the competitiveness of product.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is circuit diagram of the present utility model;

Fig. 2 is pcb board schematic diagram of the present utility model.

Embodiment

Below in conjunction with the accompanying drawing in the utility model, be clearly and completely described the technical scheme in the utility model, obviously, described is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of the utility model protection.

Below enforcement of the present utility model is described in detail by reference to the accompanying drawings, as Fig. 1, shown in 2, LED drive power goes ripple module, comprise four ports, be respectively power supply port V+, LED current port LE, current detecting port CS and ground port G, also there is stroboscopic chip U1, and be preferably JW1221 chip, the described stroboscopic chip U1 that goes has VIN pin 1, GND pin 2, VC pin 3, VG pin 4, VS pin 5 and VLMT pin 6, described power supply port V+ contact resistance R2, resistance R2 connects electric capacity C1 and VIN pin 1, GND pin 2 is connected with earth terminal 0, VC pin 3 is contact resistance R3 and electric capacity C3 respectively, VG pin 4 is connected with filter capacitor C2 and is connected with metal-oxide-semiconductor Q1, described metal-oxide-semiconductor Q1 is connected with resistance R5 and LED current port LE, VS pin 5 is connected with current detecting port CS, and VLMT pin 6 is connected with resistance R1, described resistance R1 connects metal-oxide-semiconductor Q1.Described electric capacity C1, earth terminal 0, resistance R3, electric capacity C3, electric capacity C2 and resistance R5 all connect grounding ports G.Said structure is arranged at a pcb board, and described pcb board has external pin Y.

The utility model is when operating, and power supply port V+ is charged to electric capacity C1 by resistance R2, and when electric capacity C1 reaches the starting resistor of chip, chip is started working; Resistance R3 and electric capacity C3 is the loop compensation of chip, and this compensating circuit makes the performance of chip more stable; Output current flows into LED current port LE after LED, is controlled by metal-oxide-semiconductor Q1, and VLMT pin 6 detects the drain voltage of metal-oxide-semiconductor Q1 by resistance R1 simultaneously, and when drain voltage exceedes short-circuit protection threshold voltage, chip closes metal-oxide-semiconductor Q1; The filter capacitor C2 of driving stage is used for the interference signal of filtering driving stage; By regulating the resistance of R5 resistance, correspondingly output current can be changed.

The above, content of the present utility model is not limited to cited by embodiment, and those of ordinary skill in the art take the conversion of any equivalence to the utility model scheme by reading the utility model specification, be claim of the present utility model and contain.

Claims (4)

1.LED driving power goes ripple module, it is characterized in that, comprise four ports, be respectively power supply port V+, LED current port LE, current detecting port CS and ground port G, also there is stroboscopic chip U1, the described stroboscopic chip U1 that goes has VIN pin (1), GND pin (2), VC pin (3), VG pin (4), VS pin (5) and VLMT pin (6), described power supply port V+ contact resistance R2, resistance R2 connects electric capacity C1 and VIN pin (1), GND pin (2) is connected with earth terminal (0), VC pin (3) is contact resistance R3 and electric capacity C3 respectively, VG pin (4) is connected with electric capacity C2 and is connected with metal-oxide-semiconductor Q1, described metal-oxide-semiconductor Q1 is connected with resistance R5 and LED current port LE, VS pin (5) is connected with current detecting port CS, and VLMT pin (6) is connected with resistance R1, described resistance R1 connects metal-oxide-semiconductor Q1.

2. go ripple module according to the LED drive power described in claim 1, it is characterized in that, described electric capacity C1, earth terminal (0), resistance R3, electric capacity C3, electric capacity C2 and resistance R5 all connect grounding ports G.

3. go ripple module according to the LED drive power described in claim 1, it is characterized in that, electric capacity C2 is filter capacitor.

4. go ripple module according to the LED drive power described in claim 1, it is characterized in that, described LED drive power goes ripple module installation in a pcb board, and described pcb board has external pin.