CN208174000U - A kind of mode of laser group driving circuit based on 3501 chips - Google Patents

Abstract

The utility model relates to a kind of mode of laser group driving circuit based on 3501 chips, belongs to technical field of integrated circuits.The mode of laser group driving circuit includes：3501 chips and bleeder circuit, first pin of 3501 chip is connect with the second pin of itself, the third pin of 3501 chip is grounded, the 4th pin and the 5th pin of 3501 chip are connect with the bleeder circuit, 6th pin of 3501 chip is through a capacity earth, 7th pin of 3501 chip is grounded, for connecting with the negative pole end of mode of laser group, first pin is also respectively used to connect with the positive terminal of the mode of laser group and a power supply 8th pin of 3501 chip.The mode of laser group driving circuit using 3501 chips as driving element, to provide required operating current for mode of laser group, with guarantee the mode of laser group can still can be reliable and stable in various working environments complicated and changeable work.

Description

A kind of mode of laser group driving circuit based on 3501 chips

Technical field

The utility model belongs to technical field of integrated circuits, and in particular to a kind of mode of laser group driving based on 3501 chips Circuit.

Background technique

Mode of laser group is widely used in the engineerings such as ranging, building neck due to having the features such as brightness is high, intuitive and precision is high Domain.Since the working environment of mode of laser group is complicated and changeable, and working environment complicated and changeable will affect the workability of mode of laser group Can, therefore, how to guarantee in various working environments complicated and changeable, the work that mode of laser group still can be reliable and stable becomes Focus of attention in industry.

Utility model content

In consideration of it, the purpose of this utility model is to provide one kind to be based on 3501 chip laser mould group driving circuits, to have Effect ground improves the above problem.

What the embodiments of the present invention were realized in：

The utility model embodiment provides one kind based on 3501 chip laser mould group driving circuits, including：3501 chips And bleeder circuit, the first pin of 3501 chip are connect with the second pin of itself, the third pin of 3501 chip Ground connection, the 4th pin and the 5th pin of 3501 chip are connect with the bleeder circuit, and the 6th of 3501 chip the Pin is grounded through a capacity earth, the 7th pin of 3501 chip, and the 8th pin of 3501 chip is used for and laser The negative pole end of mould group connects, and first pin is also respectively used to connect with the positive terminal of the mode of laser group and a power supply.

In the utility model optional embodiment, the bleeder circuit includes：First resistor and second resistance, described One end of one resistance is connect with the 4th pin, the other end of the first resistor respectively with the 5th pin and described One end of two resistance connects, the other end ground connection of the second resistance.

In the utility model optional embodiment, the bleeder circuit further includes：First filter capacitor, first filter One end of wave capacitor is connect with the other end of the first resistor, the other end ground connection of first filter capacitor.

In the utility model optional embodiment, the mode of laser group driving circuit further includes：Second filter capacitor, institute The one end for stating the second filter capacitor is connect with first pin, the other end ground connection of second filter capacitor.

In the utility model optional embodiment, the mode of laser group driving circuit further includes：Current-limiting resistance, described Seven pins are grounded through the current-limiting resistance.

In the utility model optional embodiment, the first resistor is slide rheostat.

In the utility model optional embodiment, the second resistance is slide rheostat.

In the utility model optional embodiment, first filter capacitor is 104 capacitors.

In the utility model optional embodiment, second filter capacitor is 104 capacitors.

In the utility model optional embodiment, the resistance value of the current-limiting resistance is 0.33 ohm.

It is provided by the embodiment of the utility model to be based on 3501 chip laser mould group driving circuits, including：3501 chips and point First pin of volt circuit, 3501 chip is connect with the second pin of itself, the third pin ground connection of 3501 chip, The 4th pin and the 5th pin of 3501 chip are connect with the bleeder circuit, the 6th pin warp of 3501 chip One capacity earth, the 7th pin ground connection of 3501 chip, the 8th pin of 3501 chip are used for and mode of laser group Negative pole end connection, first pin are also respectively used to connect with the positive terminal of the mode of laser group and a power supply.The mode of laser Group driving circuit uses 3501 chips as driving element, to provide required operating current, and 3501 core for mode of laser group 4th pin of piece and the 5th pin are connect with bleeder circuit, i.e., the voltage exported through the 4th pin is divided through bleeder circuit Input voltage of the voltage afterwards as the 5th pin, to guarantee that the mode of laser group can be in various working environments complicated and changeable still So reliable and stable work of energy.

Other feature and advantage of the utility model will illustrate in subsequent specification, also, partly from specification It becomes apparent, or is understood and implementing the utility model embodiment.The purpose of this utility model and other advantages can It is achieved and obtained by specifically noted structure in written specification, claims and attached drawing.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other attached drawings.By the way that shown in attached drawing, the above and other purpose, feature and advantage of the utility model will more Clearly.Identical appended drawing reference indicates identical part in all the attached drawings.Do not drawn by actual size equal proportion scaling deliberately Attached drawing processed, it is preferred that emphasis is show the purport of the utility model.

Fig. 1 shows a kind of mode of laser group driving circuit based on 3501 chips of an embodiment of the present invention offer Circuit diagram.

Fig. 2 shows a kind of mode of laser group driving circuits based on 3501 chips that another embodiment of the utility model provides Circuit diagram.

Fig. 3 shows a kind of mode of laser group driving circuit based on 3501 chips of another embodiment of the utility model offer Circuit diagram.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.

Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the range of the utility model protection.

It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.

In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", The orientation or positional relationship of the instructions such as "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings or this is practical new Type product using when the orientation or positional relationship usually put, be merely for convenience of describing the present invention and simplifying the description, and It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore It should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and It cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition Solve the concrete meaning of above-mentioned term in the present invention.

First embodiment

The utility model embodiment provides a kind of mode of laser group driving circuit based on 3501 chips, as shown in Figure 1.It should Mode of laser group driving circuit includes：3501 chips and bleeder circuit.

Core element of 3501 chip as the mode of laser group driving circuit, is encapsulated using DFN8, that is, includes：First Pin, second pin, third pin, the 4th pin, the 5th pin, the 6th pin, the 7th pin and the 8th pin.Wherein, Fig. 1 In U1 be 3501 above-mentioned chips.

First pin is positive pole pin, that is, meets VCC, when in use, which connect with a power supply, and second pin is Enabled pin, when the second pin connects high level, which is in the operating mode that can be worked normally, and works in line Property constant current mode, therefore, when using 3501 chip, which connects high level, such as connect with the first pin, meets VCC. Third pin is power cathode, i.e. GND pin, is grounded when in use.4th pin is benchmark voltage output pin, provides one Stable voltage output is connect with a bleeder circuit when in use, so that the voltage exported through the 4th pin divides through bleeder circuit The 5th pin is conveyed to after pressure.5th pin is to obtain partial pressure pin to connect with the bleeder circuit, to obtain through bleeder circuit Voltage after partial pressure.6th pin of 3501 chip is grounded through a capacitor C0, when capacitor C0 is used to inhibit electrifying startup, The transient current spike of generation, to protect mode of laser group not to be burned.7th pin ground connection, current-limiting resistance is 0 ohm at this time, core The operating current of piece supply mode of laser group reaches maximum value.8th pin connects the negative pole end of mode of laser group.In addition, mode of laser group Positive terminal when in use, connects positive pole, namely connects the first pin.

As an alternative embodiment, the bleeder circuit includes：First resistor R1 and second resistance R2.Described first One end of resistance R1 is connect with the 4th pin, the other end of the first resistor R1 respectively with the 5th pin and described One end of second resistance R2 connects, the other end ground connection of the second resistance R2.

Wherein, as an alternative embodiment, above-mentioned first resistor R1 can be resistance value it is fixed can not power transformation Resistance is also possible to the variable slide rheostat of resistance value.Similarly, above-mentioned second resistance R2 can be the immutable of resistance value fixation Resistance is also possible to the variable slide rheostat of resistance value.

Second embodiment

Mode of laser group driving circuit provided in this embodiment based on 3501 chips, compared with first embodiment, such as Fig. 2 institute Show, the difference is that, mode of laser group driving circuit provided in this embodiment further includes：Filter capacitor C2 (the second filtered electrical Hold) and current-limiting resistance R3.

Further, in order to stablize the performance of the mode of laser group driving circuit, between the first pin and third pin A filter capacitor C2 is accessed, i.e., described first pin is also grounded through a filter capacitor C2, is connect for filtering out the first pin The ripple in voltage signal that power supply is exported.

Wherein, the capacitance of filter capacitor C2 can select the capacitor of 100NF, i.e. 104 capacitors, be also possible to using 1UF Capacitor, i.e. 105 capacitors and the capacitor of other capacitances, such as 10UF, i.e. 106 capacitors.

Further, the 7th pin is grounded through a current-limiting resistance R3, the external current-limiting resistance R3 cooperation the 5th of the 7th pin The partial pressure of pin input obtains a specific current value, this current value is work needed for mode of laser group according to Ohm's law Make electric current.

It wherein, should as an alternative embodiment, above-mentioned current-limiting resistance R3 is the fixed fixed resistance of resistance value The resistance value of current-limiting resistance R3 is usually at 1 ohm hereinafter, such as 0.33 ohm.

3rd embodiment

Mode of laser group driving circuit provided in this embodiment based on 3501 chips, compared with second embodiment, such as Fig. 3 institute Show, the difference is that, mode of laser group driving circuit provided in this embodiment further includes：Another filter capacitor C1 (the first filter Wave capacitor).Further, i.e., the bleeder circuit in the present embodiment is different from bleeder circuit shown in second embodiment, this implementation Bleeder circuit shown in example further includes filter capacitor C1 other than including first resistor R1 and second resistance R2.

Further, one end of filter capacitor C1 is connect with the other end of the first resistor R1, the filter capacitor The other end of C1 is grounded, the ripple in voltage for filtering out the output of the 4th pin.

Wherein, the capacitance of filter capacitor C1 can select the capacitor of 100NF, i.e. 104 capacitors, be also possible to using 1UF Capacitor, i.e. 105 capacitors and the capacitor of other capacitances, such as 10UF, i.e. 106 capacitors.

It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of mode of laser group driving circuit based on 3501 chips, which is characterized in that including：3501 chips and bleeder circuit, First pin of 3501 chip is connect with the second pin of itself, the third pin ground connection of 3501 chip, described 4th pin of 3501 chips and the 5th pin are connect with the bleeder circuit, and the 6th pin of 3501 chip is through an electricity Hold ground connection, the 7th pin ground connection of 3501 chip, the 8th pin of 3501 chip is for the cathode with mode of laser group End connection, first pin are also respectively used to connect with the positive terminal of the mode of laser group and a power supply.

2. mode of laser group driving circuit according to claim 1, which is characterized in that the bleeder circuit includes：First electricity Resistance and second resistance, one end of the first resistor connect with the 4th pin, the other end of the first resistor respectively with 5th pin is connected with one end of the second resistance, the other end ground connection of the second resistance.

3. mode of laser group driving circuit according to claim 2, which is characterized in that the bleeder circuit further includes：First One end of filter capacitor, first filter capacitor is connect with the other end of the first resistor, first filter capacitor Other end ground connection.

4. mode of laser group driving circuit according to claim 1, which is characterized in that the mode of laser group driving circuit also wraps It includes：Second filter capacitor, one end of second filter capacitor are connect with first pin, second filter capacitor it is another One end ground connection.

5. mode of laser group driving circuit according to claim 1-4, which is characterized in that the mode of laser group is driven Dynamic circuit further includes：Current-limiting resistance, the 7th pin are grounded through the current-limiting resistance.

6. mode of laser group driving circuit according to claim 2, which is characterized in that the first resistor is sliding variable resistance Device.

7. mode of laser group driving circuit according to claim 2, which is characterized in that the second resistance is sliding variable resistance Device.

8. mode of laser group driving circuit according to claim 3, which is characterized in that first filter capacitor is 104 electricity Hold.

9. mode of laser group driving circuit according to claim 4, which is characterized in that second filter capacitor is 104 electricity Hold.

10. mode of laser group driving circuit according to claim 5, which is characterized in that the resistance value of the current-limiting resistance is 0.33 ohm.