CN207560397U - Constant current driver circuit for LED and lamps and lanterns - Google Patents
Constant current driver circuit for LED and lamps and lanterns Download PDFInfo
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- CN207560397U CN207560397U CN201721613679.7U CN201721613679U CN207560397U CN 207560397 U CN207560397 U CN 207560397U CN 201721613679 U CN201721613679 U CN 201721613679U CN 207560397 U CN207560397 U CN 207560397U
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Abstract
Constant current driver circuit for LED provided by the utility model, including power supply module, voltage detection module, 4 string LED light strings being connected in series with, 4 switch modules, 4 filter modules, electric current drive module, switch control module；4 string LED light strings respectively include 1 LED unit, 2 LED units, 4 LED units, 8 LED units；The supply voltage that voltage detection module detection power supply module provides, and switch control module is controlled to send out switch control signal according to the supply voltage, the switch control signal for control 4 respectively with the series-parallel switch module of corresponding LED light, so that the quantity of the LED unit to shine in power circuit with the increase of supply voltage also accordingly increases, it is achieved thereby that 16 sections of drivings, and then realize high efficiency, high PF, low THD effects.Additionally provide a kind of lamps and lanterns.
Description
Technical field
The utility model is related to LED constant current actuation techniques field, specifically, the utility model is related to a kind of LED constant currents
Driving circuit and lamps and lanterns.
Background technology
In illuminating industry, constant current driver circuit for LED is widely used.Traditional constant current driver circuit for LED is big
Majority can only accomplish 5 sections of drivings, and realization of debugging subharmonic is difficult to when system is applied and meets authentication requesting, and inefficiency.
Utility model content
The purpose of this utility model is intended at least solve the technology of one of above-mentioned technological deficiency, particularly inefficiency
Defect.
The utility model provides a kind of constant current driver circuit for LED, including：Power supply module, is connected in series with voltage detection module
4 string LED light strings, 4 switch modules, 4 filter modules, electric current drive module, switch control module；
The 4 string LED light string is respectively LED light string 1, LED light string 2, LED light string 3, LED light string 4, and LED light string 1 includes 1
A LED unit, LED light string 2 includes the LED unit of 2 series connection, LED light string 3 includes the LED unit of 4 series connection, LED light string 4
Include the LED unit of 8 series connection；4 switch modules are respectively K1, K2, K3, K4；Often string LED light string and the corresponding switch
Wired in parallel, and it is in parallel with the corresponding filter module, and LED light string 1, LED light string 2, LED light string 3, LED light string 4 are right respectively
Answer K1, K2, K3, K4；
The power supply module is sequentially connected the 4 string LED light string, the electric current drive module and then is grounded, the power supply
Module provides supply voltage for LED light string, and the electric current drive module causes LED light string to pass through constant output current；
The voltage detection module is used to detect the supply voltage, and according to the control of the size of the supply voltage
Switch control module exports 4 switch control signals, and 4 switch control signals control the corresponding switch module respectively
Closure with the corresponding LED light string of short circuit, switch module is disconnected when switch control signal is 1, when switch control signal is 0
Switch module is closed；
If the binary numeral of 0≤n≤14, n are (n4n3n2n1)2, predeterminated voltage Vmax；
When the supply voltage is in Vmax/ (16-n)~Vmax/ (16-n-1), the corresponding switch of K1, K2, K3, K4
It is respectively n to control signal1、n2、n3、n4；When the supply voltage is greater than or equal to Vmax, the corresponding switch of K1, K2, K3, K4
It is respectively 1,1,1,1 to control signal.
The power supply module includes rectification unit in one of the embodiments,.
The voltage detection module includes resistance R1, resistance R2, AD conversion unit in one of the embodiments,；Institute
The output terminal for stating power supply module is sequentially connected resistance R1, resistance R2 and then is grounded, and the connecting pin between resistance R1 and resistance R2 connects
The input terminal of the AD conversion unit is connect, the output terminal of the AD conversion unit connects the switch control module to control
The switch control module exports 4 switch control signals.
The switch module includes the first controllable switch device, the switch control module in one of the embodiments,
Connect the control terminal and output switch control signal of the first controllable switch device.
In one of the embodiments, the first controllable switch device be field-effect metal-oxide-semiconductor, first controllable switch
The drain electrode of device connects the anode of corresponding LED light string, and the source electrode of the first controllable switch device connects corresponding LED light string
Cathode.
The switch control module includes four the second controllable switch devices, the voltage in one of the embodiments,
Detection module connects the control terminal of the second controllable switch device, described in the first end connection of the second controllable switch device
The control terminal of first controllable switch device, the second end ground connection of the second controllable switch device.
In one of the embodiments, the second controllable switch device be field-effect metal-oxide-semiconductor, second controllable switch
The first end of device is drain electrode, and the second end of the second controllable switch device is source electrode.
Resistance is also associated between the drain and gate of the first controllable switch device in one of the embodiments,
Clamp diode is also associated between the grid and source electrode of the first controllable switch device, the anode of the clamp diode connects
Connect the source electrode of the first controllable switch device.
The LED light string further includes protection diode in one of the embodiments, and the protection diode and LED are mono-
Member is connected in series with.
Each filter module includes capacitance in one of the embodiments,.
The electric current drive module is also connected with the voltage detection module in one of the embodiments, and the electric current drives
Dynamic model root tuber controls the size of output current according to the size of the supply voltage.
The electric current drive module controls the output current and the supply voltage same in one of the embodiments,
Phase.
The utility model also provides a kind of lamps and lanterns, including the constant current driver circuit for LED described in any of the above-described embodiment.
Above-mentioned constant current driver circuit for LED, including：Power supply module, voltage detection module, 4 string LED light being connected in series with
String, 4 switch modules, 4 filter modules, electric current drive module, switch control module；4 string LED light strings respectively include 1 LED
Unit, 2 LED units, 4 LED units, 8 LED units；The supply voltage that voltage detection module detection power supply module provides,
And switch control module being controlled to send out switch control signal according to the supply voltage, the switch control signal is for 4 points of control
Not with the series-parallel switch module of corresponding LED light so that with the increase of supply voltage in power circuit shine LED
The quantity of unit also accordingly increases, it is achieved thereby that 16 sections of drivings, and then realize high efficiency, high PF, low THD effects.
The additional aspect of the utility model and advantage will be set forth in part in the description, these will be from following description
In become apparent or recognized by the practice of the utility model.
Description of the drawings
The utility model is above-mentioned and/or additional aspect and advantage from the following description of the accompanying drawings of embodiments will
Become apparent and be readily appreciated that, wherein：
Fig. 1 is the constant current driver circuit for LED module map of one embodiment；
Fig. 2 is the constant current driver circuit for LED concrete principle figure of one embodiment；
Fig. 3 is the oscillogram of supply voltage and output current in one embodiment；
Fig. 4 is the supply voltage of one embodiment and the oscillogram of 4 switch control signals.
Specific embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and cannot be construed to the utility model
Limitation.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that it is used in the specification of the utility model
Wording " comprising " refer to there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or
Other one or more features of addition, integer, step, operation, element, component and/or their group.It should be understood that when us
Element is claimed to be " connected " or during " coupled " to another element, it can be directly connected or coupled to other elements or can also
There are intermediary elements.In addition, " connection " used herein or " coupling " can include wireless connection or wireless coupling.Used here as
Wording "and/or" including one or more associated list items whole or any cell and all combine.
Those skilled in the art of the present technique are appreciated that unless otherwise defined all terms used herein are (including technology art
Language and scientific terminology), there is the meaning identical with the general understanding of the those of ordinary skill in the utility model fields.Also
It should be understood that those terms such as defined in the general dictionary, it should be understood that have and the context of the prior art
In the consistent meaning of meaning, and unless by specific definitions as here, otherwise will not use idealization or too formal
Meaning is explained.
Fig. 1 is the constant current driver circuit for LED module map of one embodiment, and Fig. 2 is the LED constant current driving electricity of one embodiment
Road concrete principle figure, incorporated by reference to Fig. 1 and Fig. 2.
The utility model provides a kind of constant current driver circuit for LED, including：Power supply module, is connected in series with voltage detection module
4 string LED light strings, 4 switch modules, 4 filter modules, electric current drive module, switch control module.
The 4 string LED light string is respectively LED light string 1, LED light string 2, LED light string 3, LED light string 4.LED light string 1 includes 1
LED unit, LED light string 2 includes the LED unit of 2 series connection, LED light string 3 includes the LED unit of 4 series connection, LED light string 4 is wrapped
Include the LED unit of 8 series connection.In the present embodiment, LED light string further includes protection diode, the protection diode and LED unit
It is connected in series with, specifically, protection diode D1 connects with LED light string 1, protection diode D2 connects with LED light string 2, protection two
Pole pipe D3 connects with LED light string 3, and protection diode D4 connects with LED light string 4.
4 switch module difference switch modules 1 (K1), switch module 2 (K2), switch module 3 (K3), switch modules 4
(K4).4 filter modules are respectively filter module 1 (F1), filter module 2 (F2), filter module 3 (F3), filter module 4
(F4).Often string LED light string and the parallel connection of the corresponding switch module, and it is in parallel with corresponding filter module.In the present embodiment,
LED light string 1, LED light string 2, LED light string 3, LED light string 4 correspond to K1, K2, K3, K4 respectively and correspond to respectively F1, F2, F3,
F4, i.e. LED light string m, Km, Fm threes are in parallel, wherein 1≤m≤4.
In the present embodiment, switch module includes the first controllable switch device, and switch control module connection first is controllably opened
Close the control terminal and output switch control signal of device.
In the present embodiment, the first controllable switch device is N-channel type field-effect metal-oxide-semiconductor, the first controllable switch device
Drain electrode connects the anode (current input terminal) of corresponding LED light string, and the source electrode of the first controllable switch device connects corresponding LED light
The cathode (current output terminal) of string.Specifically, K1 includes the drain electrode connection LED light string 1 of N-channel type field-effect metal-oxide-semiconductor Q1, Q1
Anode, the source electrode of Q1 connect the cathode of corresponding LED light string 1；The drain electrode that K2 includes N-channel type field-effect metal-oxide-semiconductor Q2, Q2 connects
The anode of LED light string 2, the source electrode of Q2 connect the cathode of corresponding LED light string 2；K3 includes N-channel type field-effect metal-oxide-semiconductor Q3, Q3
Drain electrode connection LED light string 3 anode, the source electrode of Q3 connects the cathode of corresponding LED light string 3；K4 includes N-channel type field-effect
The anode of the drain electrode connection LED light string 4 of metal-oxide-semiconductor Q4, Q4, the source electrode of Q4 connect the cathode of corresponding LED light string 4.
In some embodiments, resistance can also be connected between the drain and gate of the first controllable switch device, this
Clamp diode is also associated between the grid and source electrode of one controllable switch device, the anode connection first of the clamp diode can
The source electrode of switching device is controlled, the cathode of the clamp diode connects the grid of the first controllable switch device.Specifically, the drain electrode of Q1
Resistance R3, the source electrode of the anode connection Q1 of clamp diode ZD1 are connected between grid, the cathode of clamp diode ZD1 connects
Connect the grid of Q1；Resistance R4, the source electrode of the anode connection Q2 of clamp diode ZD2, pincers are connected between the drain and gate of Q2
The grid of the cathode connection Q2 of position diode ZD2；Resistance R5 is connected between the drain and gate of Q3, clamp diode ZD3's
Anode connects the source electrode of Q3, the grid of the cathode connection Q3 of clamp diode ZD3；Resistance is connected between the drain and gate of Q4
The source electrode of the anode connection Q4 of R6, clamp diode ZD4, the grid of the cathode connection Q4 of clamp diode ZD4.And in this implementation
In example, the drain electrode of Q1 passes sequentially through protection diode D1, resistance R3 connects its grid, and the drain electrode of Q2 passes sequentially through protection diode
D2, resistance R4 connect its grid, and the drain electrode of Q3 passes sequentially through protection diode D3, resistance R5 connects its grid, the drain electrode of Q4 according to
It is secondary that its grid is connected by protection diode D4, resistance R6.
Filter module is made of capacitance, such as in the present embodiment, and filter module F1, that is, capacitance C1, filter module F2 are electricity
Hold C2, filter module F3, that is, capacitance C3, filter module F4, that is, capacitance C4.
Power supply module is sequentially connected the 4 string LED light string, electric current drive module and then is grounded, which is LED light string
Supply voltage (VIN) is provided, electric current drive module causes LED light string to pass through constant output current.
In the present embodiment, electric current drive module is also connected with voltage detection module.Fig. 2 is seen, between resistance R1 and resistance R2
Connecting pin connection electric current drive module.Electric current drive module can control the big of output current according to the size of supply voltage
It is small.Fig. 3 is the oscillogram of supply voltage and output current in one embodiment, and electric current drive module can combine switch control mould
Block control output current (Io) and supply voltage (Vin) same to phase, achieve the effect that low THD, so as to fulfill Linear Control with this.
In the present embodiment, power supply module can include rectification unit, by the AC rectification of alternating current for direct current to give LED
Lamp string is powered.For example, rectification unit can include the rectifier bridge (DB1) of bridge being made of four diodes, certainly at other
Embodiment can be other rectifier systems.Certainly it can also include storage battery in other embodiment power supply module, not go to live in the household of one's in-laws on getting married herein
It states.Electric current drive module is referred to as constant-current control module, for LED light string to be caused to pass through constant output current.
4 string LED light strings can be connected according to arbitrary arrangement sequential series.In the present embodiment, power supply module is sequentially connected
LED light string 4, LED light string 3, LED light string 1, LED light string 1, electric current drive module and then ground connection.
Voltage detection module controls the switch to control mould for detecting the supply voltage according to the size of the supply voltage
Block exports 4 switch control signals, which controls the closure of the corresponding switch module with short circuit pair respectively
The LED light string answered, when switch control signal be 1 when switch module disconnect, when switch control signal be 0 when switch module be closed.
In the present embodiment, voltage detection module includes resistance R1, resistance R2, AD conversion unit.Power supply module it is defeated
Outlet is sequentially connected resistance R1, resistance R2 and then is grounded, and the connecting pin between resistance R1 and resistance R2 connects the analog-to-digital conversion list
The input terminal of member, the output terminal connecting valve control module of the AD conversion unit is to control the switch control module to export 4
Switch control signal.
In the present embodiment, switch control module includes four the second controllable switch devices.Voltage detection module connection should
The control terminal of second controllable switch device, the first end of the second controllable switch device connect the control of the first controllable switch device
End processed, the second end ground connection of the second controllable switch device.Second controllable switch device is N-channel type field-effect metal-oxide-semiconductor, this
The first end of two controllable switch devices is drain electrode, and the second end of the second controllable switch device is source electrode.In the present embodiment, four
Second controllable switch device is respectively N-channel type field-effect metal-oxide-semiconductor M1, M2, M3, M4, voltage detection module connection M1, M2, M3,
The grid of M4, the source electrode ground connection of M1, M2, M3, M4, the drain electrode connection grid of Q1 of M1, the grid of the drain electrode connection Q2 of M2, M3
The grid of the grid of drain electrode connection Q3, the drain electrode connection Q4 of M4.
4 switch control signals for K1, K2, K3, K4 that switch control module exports in the following way：
If the binary numeral of 0≤n≤14, n are (n4n3n2n1)2, predeterminated voltage Vmax.
Such as during n=2, the binary numeral of n is (0010)2；During n=13, the binary numeral of n is (1101)2.It is default
Voltage Vmax is the maximum voltage of supply voltage under normal circumstances certainly no more than, is not excluded for supply voltage certainly in exception
When can be more than Vmax.
When supply voltage is in Vmax/ (16-n)~Vmax/ (16-n-1), such as Vmax/ (16-n)≤supply voltage
During ＜ Vmax/ (16-n-1), the corresponding switch control signal of K1, K2, K3, K4 is respectively n1、n2、n3、n4；When supply voltage is big
When Vmax, the corresponding switch control signal of K1, K2, K3, K4 is respectively 1,1,1,1.It is specifically shown in table 1 below.
Table 1
By Vmax be 4V when for, Fig. 4 be one embodiment supply voltage and 4 switch control signals oscillogram.
The utility model also provides a kind of lamps and lanterns, the constant current driver circuit for LED being somebody's turn to do including any of the above-described embodiment.
Above-mentioned constant current driver circuit for LED, including power supply module, voltage detection module, be connected in series with 4 string LED light strings,
4 switch modules, 4 filter modules, electric current drive module, switch control module；It is mono- that 4 string LED light strings respectively include 1 LED
Member, 2 LED units, 4 LED units, 8 LED units；The supply voltage that voltage detection module detection power supply module provides, and
Switch control module is controlled to send out switch control signal according to the supply voltage, the switch control signal is for 4 difference of control
With the series-parallel switch module of corresponding LED light so that with the increase of supply voltage in power circuit shine LED it is mono-
The quantity of member also accordingly increases, it is achieved thereby that 16 sections of drivings, and then realize high efficiency, high PF, low THD effects.
The above is only some embodiments of the utility model, it is noted that for the common skill of the art
For art personnel, under the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (13)
1. a kind of constant current driver circuit for LED, which is characterized in that including：Power supply module, voltage detection module, 4 strings being connected in series with
LED light string, 4 switch modules, 4 filter modules, electric current drive module, switch control module；
The 4 string LED light string is respectively LED light string 1, LED light string 2, LED light string 3, LED light string 4, and LED light string 1 includes 1
LED unit, LED light string 2 includes the LED unit of 2 series connection, LED light string 3 includes the LED unit of 4 series connection, LED light string 4 is wrapped
Include the LED unit of 8 series connection；4 switch modules are respectively K1, K2, K3, K4；Often string LED light string and the corresponding switching molding
Block is in parallel, and in parallel with the corresponding filter module, and LED light string 1, LED light string 2, LED light string 3, LED light string 4 correspond to respectively
K1、K2、K3、K4；
The power supply module is sequentially connected the 4 string LED light string, the electric current drive module and then is grounded, the power supply module
Supply voltage is provided for LED light string, the electric current drive module causes LED light string to pass through constant output current；
The voltage detection module controls the switch for detecting the supply voltage according to the size of the supply voltage
Control module exports 4 switch control signals, and 4 switch control signals control closing for the corresponding switch module respectively
It closes with the corresponding LED light string of short circuit, switch module is disconnected when switch control signal is 1, is switched when switch control signal is 0
Module is closed；
If the binary numeral of 0≤n≤14, n are (n4n3n2n1)2, predeterminated voltage Vmax；
When the supply voltage is in Vmax/ (16-n)~Vmax/ (16-n-1), the corresponding switch control of K1, K2, K3, K4
Signal is respectively n1, n2, n3, n4；When the supply voltage is greater than or equal to Vmax, the corresponding switch control of K1, K2, K3, K4
Signal processed is respectively 1,1,1,1.
2. constant current driver circuit for LED according to claim 1, which is characterized in that the power supply module includes rectification unit.
3. constant current driver circuit for LED according to claim 1, which is characterized in that the voltage detection module includes resistance
R1, resistance R2, AD conversion unit；The output terminal of the power supply module is sequentially connected resistance R1, resistance R2 and then is grounded, resistance
Connecting pin between R1 and resistance R2 connects the input terminal of the AD conversion unit, and the output terminal of the AD conversion unit connects
The switch control module is connect so that the switch control module to be controlled to export 4 switch control signals.
4. constant current driver circuit for LED according to claim 1, which is characterized in that it is controllable that the switch module includes first
Switching device, the switch control module connect the control terminal and output switch control signal of the first controllable switch device.
5. constant current driver circuit for LED according to claim 4, which is characterized in that the first controllable switch device is field
Effect metal-oxide-semiconductor, the drain electrode of the first controllable switch device connect the anode of corresponding LED light string, first controllable switch
The source electrode of device connects the cathode of corresponding LED light string.
6. constant current driver circuit for LED according to claim 5, which is characterized in that the switch control module includes four
Second controllable switch device, the voltage detection module connect the control terminal of the second controllable switch device, and described second can
The control terminal of first end connection the first controllable switch device of control switching device, the second of the second controllable switch device
End ground connection.
7. constant current driver circuit for LED according to claim 6, which is characterized in that the second controllable switch device is field
Effect metal-oxide-semiconductor, the first end of the second controllable switch device is drain electrode, and the second end of the second controllable switch device is source
Pole.
8. constant current driver circuit for LED according to claim 5, which is characterized in that the leakage of the first controllable switch device
Resistance is also associated between pole and grid, two pole of clamper is also associated between the grid and source electrode of the first controllable switch device
Pipe, the anode of the clamp diode connect the source electrode of the first controllable switch device.
9. constant current driver circuit for LED according to claim 1, which is characterized in that the LED light string further includes two poles of protection
Pipe, the protection diode and LED unit are connected in series with.
10. constant current driver circuit for LED according to claim 1, which is characterized in that each filter module includes capacitance.
11. constant current driver circuit for LED according to claim 1, which is characterized in that the electric current drive module is also connected with institute
Voltage detection module is stated, the electric current drive module controls the size of output current according to the size of the supply voltage.
12. constant current driver circuit for LED according to claim 11, which is characterized in that the electric current drive module controls institute
State output current and the same phase of the supply voltage.
13. a kind of lamps and lanterns, which is characterized in that it includes driving electricity according to claim 1~12 any one of them LED constant current
Road.
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| CN201721613679.7U CN207560397U (en) | 2017-11-27 | 2017-11-27 | Constant current driver circuit for LED and lamps and lanterns |
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| CN201721613679.7U CN207560397U (en) | 2017-11-27 | 2017-11-27 | Constant current driver circuit for LED and lamps and lanterns |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113365388A (en) * | 2021-03-18 | 2021-09-07 | 上海可大光电科技有限公司 | Lamp strip and lamp driven by constant-current power supply |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113365388A (en) * | 2021-03-18 | 2021-09-07 | 上海可大光电科技有限公司 | Lamp strip and lamp driven by constant-current power supply |
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