CN206596261U - Drive circuit - Google Patents
Drive circuit Download PDFInfo
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- CN206596261U CN206596261U CN201621418697.5U CN201621418697U CN206596261U CN 206596261 U CN206596261 U CN 206596261U CN 201621418697 U CN201621418697 U CN 201621418697U CN 206596261 U CN206596261 U CN 206596261U
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- Prior art keywords
- current
- circuit
- constant
- drive circuit
- power factor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The utility model provides a kind of drive circuit, and above-mentioned drive circuit includes：Rectifying circuit, high-voltage linear constant-current power factor adjusting circuit, constant current circuit, wherein, the rectifying circuit carries out rectification to the civil power for inputting the drive circuit, alternating current is changed into DC current, and the DC current is inputted into the high-voltage linear constant-current power factor adjusting circuit；The power factor (PF) of the drive circuit is adjusted the high-voltage linear constant-current power factor adjusting circuit, keeps the constant of the DC current and by constant current circuit described in the DC supply input；The constant current circuit reduces the corresponding voltage of the DC current, and exports constant driving current.The power factor (PF) for the drive circuit that the utility model is provided can not only be up to state standards, and scenario-frame is simple, price economy, also without stroboscopic.
Description
Technical field
The utility model is related to circuit field, more particularly to a kind of drive circuit.
Background technology
National standard is that the power factor requirements of the lamp between 5W-25W are more than 0.5 to power earlier, so industry
The BUCK constant current schemes of widely used low-power factor, scheme, these sides such as brilliant rich 283X series, dutycycle 867X series
Case is cheap and without stroboscopic.But new nation standard GB/T 24908-2014 5.4 requirements to power factor (PF) are：Nominally
The power factor (PF) that power is not more than 5W lamp is not less than 0.4, and the power of the lamp more than 5W should be not less than 0.7, if still used
Scheme before, then power factor (PF) can not reach more than 0.7, therefore can not meet the requirement that national standard is marked.
Utility model content
The utility model provides a kind of drive circuit to overcome above mentioned problem or solve the above problems at least in part.
According to one side of the present utility model there is provided a kind of drive circuit, including：Rectifying circuit, high-voltage linear are permanent
Power factor (PF) adjusting circuit, constant current circuit are flowed, wherein,
The rectifying circuit carries out rectification to the civil power for inputting the drive circuit, and alternating current is changed into direct current
Stream, and the DC current is inputted into the high-voltage linear constant-current power factor adjusting circuit；
The power factor (PF) of the drive circuit is adjusted the high-voltage linear constant-current power factor adjusting circuit, keeps
The DC current constant and by constant current circuit described in the DC supply input；
The constant current circuit reduces the corresponding voltage of the DC current, and exports constant driving current.
Optionally, the high-voltage linear constant-current power factor adjusting circuit includes：First electrochemical capacitor, the high-voltage linear
Constant-current power factor adjusting circuit adjusts the power of the drive circuit by adjusting the charging current of first electrochemical capacitor
Factor.
Optionally, the high-voltage linear constant-current power factor adjusting circuit also includes：High-voltage linear constant current IC, the one or two pole
Pipe, first resistor, second resistance, the OUT terminal mouthful of the high-voltage linear constant current IC are connected with the rectifying circuit, the high-voltage line
Property constant current IC REXT ports are connected by the first resistor with the GND ports for stating high-voltage linear constant current IC, described
REXT ports are also connected by the first resistor with the positive pole of first electrochemical capacitor and the anode of first diode,
The anode connection of the positive pole of first electrochemical capacitor and first diode is connected with each other, and first electrochemical capacitor is just
The anode of pole and first diode is grounded by the second resistance, negative pole and the rectification of first electrochemical capacitor
Connection is grounded simultaneously, the negative electrode of first diode and the constant current connection.
Optionally, the high-voltage linear constant-current power factor adjusting circuit is adjusted by adjusting the resistance value of the first resistor
Save the charging current of first electrochemical capacitor and then adjust the power factor (PF) of the drive circuit.
Optionally, the high-voltage linear constant current IC is SM2082D chips.
Optionally, the rectifying circuit is bridge rectifier circuit.
Optionally, the constant current circuit is step-down constant current circuit.
Optionally, the step-down constant current circuit is BUCK IC constant current circuits.
Optionally, the step-down constant current circuit includes BUCK constant currents IC, 3rd resistor, the 4th resistance, the 5th resistance, the
Six resistance, the second diode, the second electrochemical capacitor, inductance, electric capacity, the VCC ports of the BUCK constant currents IC pass through the described 4th
Resistance and the 3rd resistor connect the moon of first diode in the high-voltage linear constant-current power factor adjusting circuit
Pole and the OUT ports of the high-voltage linear constant current IC, while one end of the electric capacity is connected, the other end ground connection of the electric capacity,
Two DRAIN ports of the BUCK constant currents IC interconnect and connect the anode of second diode, described second simultaneously
The negative electrode of diode connects the cathode output end of the drive circuit, and the anode of second diode passes through the inductance connection
The cathode output end of the drive circuit, second electrochemical capacitor and the 5th resistance with second diode simultaneously
Connection, the inductance connection is between the anode of second diode and the negative pole of second electrochemical capacitor, and the BUCK is permanent
Two CS ports for flowing IC are interconnected and simultaneously by the 6th resistance eutral grounding, the NC of the BUCK constant currents IC, ROVP,
GND ports interconnect and are grounded simultaneously.
Optionally, the BUCK constant currents IC is BP2832 chips.
The utility model provides a kind of drive circuit, and civil power is after over commutation, by high-voltage linear constant-current power factor
Adjusting circuit adjusts power factor (PF), then coordinates the constant driving current of constant current circuit output, the power factor (PF) of the drive circuit
It can not only be up to state standards, and scenario-frame is simple, price economy, also without stroboscopic.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of specification, and in order to allow above and other purpose of the present utility model, feature
It can be become apparent with advantage, below especially exemplified by embodiment of the present utility model.
According to the accompanying drawings to the detailed description of the utility model specific embodiment, those skilled in the art will be more
Plus understand of the present utility model above-mentioned and other purposes, advantages and features.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to this practicality
New limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the illustrative view of functional configuration of the drive circuit according to the utility model embodiment；
Fig. 2 is the electrical block diagram of the drive circuit according to the utility model embodiment.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.
Power factor (PF) for national standard GBT 24908-2014 5.4 propositions is more than 0.7 technical requirements, if to expire
The newest national standard of foot, can use following two schemes：
The first, single stage power factor correction scheme, but this scheme has price, and have the defect of stroboscopic；
Second, valley fill circuit+BUCK low-power element circuit schemes, this scheme is without stroboscopic, but price, two high
Pressure electrochemical capacitor, which takes up space, is unfavorable for miniaturization, and LED output voltages are restricted.
For the defect of such scheme, one embodiment of the present utility model provides a kind of drive circuit, such as Fig. 1 institutes
Show, including：Rectifying circuit 10, high-voltage linear constant-current power factor adjusting circuit 20, constant current circuit 30, wherein, rectifying circuit 10
Rectification is carried out to the civil power of input driving circuit, alternating current is changed into DC current, and DC current is inputted into high-voltage line
Property constant-current power factor adjusting circuit 20, high-voltage linear constant-current power factor adjusting circuit 20 enters to the power factor (PF) of drive circuit
Row regulation, keeps the constant of DC current and by DC supply input constant current circuit 30, the reduction DC current of constant current circuit 30 is corresponding
Voltage, and export constant driving current.
The scheme that the present embodiment is provided adds high-voltage linear constant-current power factor adjusting circuit 20 in the driving circuit, specially
Door is used for the power factor (PF) for adjusting drive circuit, and so as to easily be up to state standards, whole circuit structure is simple, price
Economy, also without stroboscopic.
Being achieved in that for high-voltage linear constant-current power factor adjusting circuit 20 is diversified, of the present utility model one
In individual preferred embodiment, as shown in Fig. 2 high-voltage linear constant-current power factor adjusting circuit 20 can include：High-voltage linear constant current
IC U1, the first electrochemical capacitor EC1, the first diode D1, first resistor R1, second resistance R2, wherein, line high-voltage linear constant current
IC U1 OUT terminal mouthful is connected with rectifying circuit 10, and high-voltage linear constant current IC U1 REXT ports pass through first resistor R1 and height
Linear constant current IC U1 GND ports connection is pressed, REXT ports also pass through first resistor R1 and the first electrochemical capacitor EC1 positive pole
Connected with the first diode D1 anode, the first electrochemical capacitor EC1 positive pole and the first diode D1 anode are connected with each other, the
One electrochemical capacitor EC1 positive pole and the first diode D1 anode are grounded by second resistance R2, and the first electrochemical capacitor EC1's is negative
Pole is connected with rectifying circuit 10 and is grounded simultaneously, the first diode D1 negative electrode and constant current connection.
The scheme that this reality preferably applies example offer is mainly adjusted by high-voltage linear constant-current power factor adjusting circuit 20
First electrochemical capacitor EC1 charging current adjusts power factor (PF), then coordinates constant current circuit 30 to realize constant current output, with scheme
Price economy, power factor (PF) is more than 0.7, and whole lamp is without stroboscopic, the advantage of whole lamp small volume.
In the preferred embodiment, high-voltage linear constant-current power factor adjusting circuit 20 is mainly based upon high-voltage linear constant current
What IC U1 were realized.High-voltage linear constant current IC U1 are constant current drive control chip, with linear constant current in the range of certain voltage
Function.The chip includes OUT, GND and REXT pin, wherein, OUT is chip power input and constant current output port, and GND is
Chip, REXT is that output current sets end.
This preferred embodiment gives one kind and adjusts the first electrolysis by high-voltage linear constant current IC U1 and first resistor R1
Electric capacity EC1 charging current and then the scheme for adjusting power factor (PF).The present embodiment is electric by high-voltage linear constant current IC U1 accesses first
Solve electric capacity EC1 charging circuit, the first resistor R1 between REXT and GND by adjusting high-voltage linear constant current IC U1, so that it may
With the charging current of the first electrochemical capacitor EC1 required for obtaining.
In the preferred embodiment, voltage of the civil power after over commutation is Vin, voltage Vin after rectification>First electricity
Solve electric capacity EC1 voltage Vec1+ high-voltage linear constant current IC U1 constant current minimum voltage Vout (i.e. the voltage of OUT terminal mouthful output)
When, commutating voltage Vin charges to the first electrochemical capacitor EC1, and now the first electrochemical capacitor EC1 charging current Iin is by high pressure
Linear constant current IC U1 are controlled, and charging current is：Iin=Vrext/R1 (A), wherein, Vrext is high-voltage linear constant current IC U1
REXT ports voltage.In general, the representative value of the voltage of high-voltage linear constant current IC U1 REXT ports is 0.6V, institute
With the resistance by adjusting first resistor R1, it is possible to obtain desired charging current Iin value.
And voltage Vin after rectification<First electrochemical capacitor EC1 voltage Vec1+ high-voltage linear constant current IC U1 constant current
During minimum voltage Vout, high-voltage linear constant current IC U1 OUT port voltage Vout is less than minimum conducting voltage, now, high pressure
Linear constant current IC U1 are not worked, and the first electrochemical capacitor EC1 does not have charging current, and simple is discharged by the first diode D1.
Pass through above two state：The charging battery that first electrochemical capacitor EC1 is controlled by high-voltage linear constant current IC U1, and the
The repid discharge that one electrochemical capacitor EC1 is not controlled by high-voltage linear constant current IC U1, it is possible to pass through the first different electrochemical capacitors
The value of EC1 charging current and the corresponding power factor (PF) for obtaining different drive circuits.
In specific implementation process, above-mentioned high-voltage linear constant current IC U1 can use bright micro- SM2082D.Certainly, in the market
There is the high-voltage linear constant current IC of a large amount of identical functions, the high-voltage linear constant current IC of identical function can be used to substitute.
Understand that the circuit structure that above-described embodiment is provided is that a kind of cost is low, simple in construction, real based on above-described embodiment
Existing convenient scheme, only for power factor (PF) regulation, other can adjust the electricity of the first electrochemical capacitor EC1 charging current
Line structure is essentially all feasible, may be used to substitute it is above-mentioned based on high-voltage linear constant current IC U1 realize high-voltage linear perseverance
Flow power factor (PF) adjusting circuit 20.
In general, the value of power factor (PF) is bigger, then need charging time it is longer, charging current is smaller, the work(of whole lamp
The loss of rate factor adjusting circuit is bigger, and then bigger on the efficiency influence of whole lamp.Therefore, in order to avoid excessive to whole lamp efficiency
Influence, is preferably adjusted the value of power factor (PF) near the 0.7 of Standard.
It is preferred that, in order to which the high-voltage linear constant-current power factor adjusting circuit 20 provided with above-described embodiment cooperates,
As shown in figure 1, rectifying circuit 10 can be bridge rectifier circuit, constant current circuit 30 can be step-down constant current circuit.Further
, step-down constant current circuit can be BUCK IC constant current circuits.
Being achieved in that for constant current circuit 30 is diversified, in a preferred embodiment of the present utility model, such as Fig. 2
Shown, constant current circuit 30 can include：BUCK constant current IC U2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th electricity
R6, the second diode D2, the second electrochemical capacitor EC2, inductance L1, electric capacity C1, BUCK constant current IC U2 VCC ports are hindered by the
Four resistance R4 and the first diode D1 in 3rd resistor R3 connection high-voltage linear constant-current power factors adjusting circuit 20 negative electrode
With high-voltage linear constant current IC U1 OUT terminal mouthful, while connecting electric capacity C1 one end, the electric capacity C1 other end is grounded, BUCK constant currents
IC U2 two DRAIN ports interconnect and connect the second diode D2 anode simultaneously, and the second diode D2 anode leads to
Cross the cathode output end of inductance L1 connection drive circuits, the second electrochemical capacitor EC2 and the 5th resistance R5 with the second diode D2
Parallel connection, inductance L1 is connected between the second diode D2 anode and the second electrochemical capacitor EC2 negative pole, BUCK constant current IC U2
Two CS ports interconnect and simultaneously pass through the 6th resistance R6 ground connection, BUCK constant current IC U2 NC, ROVP, GND port
Interconnect and be grounded simultaneously.
BUCK constant currents IC is voltage-dropping type constant-current driven chip, the chip include GND, ROVP, VCC, NC, two CS, two
DRAIN pins, wherein, GND is chip, and ROVP is open-circuit-protection voltage-regulation end, connecting resistance to, VCC is chip power,
NC is connectionless, and DRAIN drains for internal high pressure power tube, and CS is current sample end, and sampling resistor is connected between CS and GND ends.
Based on above-mentioned bridge rectifier circuit and BUCK IC constant currents circuit can the input based on civil power, it is permanent in high-voltage linear
Stream power factor (PF) adjusting circuit 20 is determined after power factor (PF), exports constant driving current.In specific implementation process, adopted
BUCK IC can be BP 2832, it is of course also possible to have the IC of identical function using other.
The scheme provided based on the utility model embodiment, after the rectified rectification of circuit 10 of civil power, high-voltage linear constant current work(
Rate factor adjusting circuit 20 is by controlling the first electrochemical capacitor EC1 charging and discharging currents to adjust power factor (PF), so as to obtain institute
The power factor (PF) for meeting national standard needed, then input by constant current circuit 30 power of constant driving current, not only drive circuit
Factor is more than 0.7, and constant current is without stroboscopic, and electrochemical capacitor space-consuming is beneficial to miniaturization, cost also very economical.
In the specification that this place is provided, numerous specific details are set forth.It is to be appreciated, however, that of the present utility model
Embodiment can be put into practice in the case of these no details.In some instances, be not been shown in detail known method,
Structure and technology, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand one or many in each utility model aspect
It is individual, above in the description of exemplary embodiment of the present utility model, each feature of the present utility model is divided together sometimes
Group is into single embodiment, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following meaning
Figure：The utility model i.e. claimed requires features more more than the feature being expressly recited in each claim.
More precisely, as the following claims reflect, it is in terms of utility model single less than disclosed above
All features of embodiment.Therefore, it then follows thus claims of embodiment are expressly incorporated in the specific embodiment party
Formula, wherein each claim is in itself as separate embodiments of the present utility model.
Although in addition, it will be appreciated by those of skill in the art that some embodiments described herein include other embodiments
In included some features rather than further feature, but the combination of the feature of be the same as Example does not mean in this practicality newly
Within the scope of type and form different embodiments.For example, in detail in the claims, embodiment claimed it is any
One of mode can use in any combination.
The utility model is limited it should be noted that above-described embodiment is illustrated rather than to the utility model,
And those skilled in the art can design alternative embodiment without departing from the scope of the appended claims.In right
It is required that in, any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" is not arranged
Except there is element or step not listed in the claims.Word "a" or "an" before element does not exclude the presence of many
Individual such element.The utility model can be by means of including the hardware of some different elements and by means of properly programmed
Computer is realized.In if the unit claim of equipment for drying is listed, several in these devices can be by same
One hardware branch is embodied.The use of word first, second, and third does not indicate that any order.Can be by these lists
Word is construed to title.
So far, although those skilled in the art will appreciate that herein it is detailed have shown and described it is of the present utility model many
Individual exemplary embodiment, still, still can be public according to the utility model in the case where not departing from the utility model spirit and scope
The content opened directly determines or derived many other variations or modifications for meeting the utility model principle.Therefore, this practicality is new
The scope of type is understood that and regarded as to cover other all these variations or modifications.
Claims (10)
1. a kind of drive circuit, including：Rectifying circuit, high-voltage linear constant-current power factor adjusting circuit, constant current circuit, wherein,
The rectifying circuit carries out rectification to the civil power for inputting the drive circuit, and alternating current is changed into DC current, and
The DC current is inputted into the high-voltage linear constant-current power factor adjusting circuit；
The power factor (PF) of the drive circuit is adjusted the high-voltage linear constant-current power factor adjusting circuit, keeps described
DC current constant and by constant current circuit described in the DC supply input；
The constant current circuit reduces the corresponding voltage of the DC current, and exports constant driving current.
2. drive circuit according to claim 1, wherein, the high-voltage linear constant-current power factor adjusting circuit includes：
First electrochemical capacitor, charging of the high-voltage linear constant-current power factor adjusting circuit by adjusting first electrochemical capacitor is electric
The power factor (PF) of the stream regulation drive circuit.
3. drive circuit according to claim 2, wherein, the high-voltage linear constant-current power factor adjusting circuit is also wrapped
Include：High-voltage linear constant current IC, the first diode, first resistor, second resistance, the OUT terminal of the high-voltage linear constant current IC mouthful with
The rectifying circuit connection, the REXT ports of the high-voltage linear constant current IC high-voltage linear is stated with described by the first resistor
Constant current IC GND ports connection, the REXT ports also by the positive pole of the first resistor and first electrochemical capacitor and
The anode connection of the anode connection of first diode, the positive pole of first electrochemical capacitor and first diode is mutual
Connection, the anode of the positive pole of first electrochemical capacitor and first diode is grounded by the second resistance, and described the
The negative pole of one electrochemical capacitor is connected with the rectifying circuit to be grounded simultaneously, the negative electrode of first diode and the constant current circuit
Connection.
4. drive circuit according to claim 3, wherein, the high-voltage linear constant-current power factor adjusting circuit is by adjusting
Save the charging current of the first electrochemical capacitor described in the resistance value adjusting of the first resistor and then adjust the work(of the drive circuit
Rate factor.
5. the drive circuit according to claim any one of 1-4, wherein, the high-voltage linear constant current IC is SM2082D cores
Piece.
6. the drive circuit according to claim any one of 1-4, wherein, the rectifying circuit is bridge rectifier circuit.
7. the drive circuit according to claim 3 or 4, wherein, the constant current circuit is step-down constant current circuit.
8. drive circuit according to claim 7, the step-down constant current circuit is BUCK IC constant current circuits.
9. drive circuit according to claim 8, wherein, the step-down constant current circuit includes BUCK constant currents IC, the 3rd
Resistance, the 4th resistance, the 5th resistance, the 6th resistance, the second diode, the second electrochemical capacitor, inductance, electric capacity, the BUCK are permanent
The VCC ports for flowing IC connect the high-voltage linear constant-current power factor regulation line by the 4th resistance and the 3rd resistor
The negative electrode of first diode in road and the high-voltage linear constant current IC OUT terminal mouthful, while connecting the one of the electric capacity
End, the other end ground connection of the electric capacity, two DRAIN ports of the BUCK constant currents IC interconnect and connect described the simultaneously
The anode of two diodes, the negative electrode of second diode connects the cathode output end of the drive circuit, the two or two pole
The anode of pipe passes through the cathode output end of drive circuit described in the inductance connection, second electrochemical capacitor and the 5th electricity
Resistance with second diodes in parallel, anode and second electrochemical capacitor of the inductance connection in second diode
Negative pole between, two CS ports of the BUCK constant currents IC are interconnected and simultaneously by the 6th resistance eutral grounding, described
BUCK constant currents IC NC, ROVP, GND port interconnects and is grounded simultaneously.
10. drive circuit according to claim 9, the BUCK constant currents IC is BP2832 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621418697.5U CN206596261U (en) | 2016-12-22 | 2016-12-22 | Drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621418697.5U CN206596261U (en) | 2016-12-22 | 2016-12-22 | Drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206596261U true CN206596261U (en) | 2017-10-27 |
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ID=60130802
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621418697.5U Active CN206596261U (en) | 2016-12-22 | 2016-12-22 | Drive circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793294A (en) * | 2016-12-22 | 2017-05-31 | 苏州欧普照明有限公司 | Drive circuit |
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2016
- 2016-12-22 CN CN201621418697.5U patent/CN206596261U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793294A (en) * | 2016-12-22 | 2017-05-31 | 苏州欧普照明有限公司 | Drive circuit |
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