CN202750290U - Driver for lighting device and lighting device with driver - Google Patents
Driver for lighting device and lighting device with driver Download PDFInfo
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- CN202750290U CN202750290U CN 201220402408 CN201220402408U CN202750290U CN 202750290 U CN202750290 U CN 202750290U CN 201220402408 CN201220402408 CN 201220402408 CN 201220402408 U CN201220402408 U CN 201220402408U CN 202750290 U CN202750290 U CN 202750290U
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Abstract
The utility model relates to a driver (100) for a lighting device and the lighting device with the driver. The driver comprises a rectifying unit (1), a primary voltage reduction unit (BUCK1), a secondary voltage reduction unit (BUCK2), a microprogrammed control unit (MCU) and a light source (2), wherein the primary voltage reduction unit (BUCK1) is connected to an output end of the rectifying unit (1); the secondary voltage reduction unit (BUCK2) is connected to an output end of the primary voltage reduction unit (BUCK1); and the primary voltage reduction unit and the secondary voltage reduction unit are respectively connected with the microprogrammed control unit (MCU), and the light source (2) of the lighting device is connected to an output end of the secondary voltage reduction unit. The driver (100) further comprises a current detection unit (3) which is connected to a negative pole end of the light source (2), wherein the current detection unit is used for detecting output current (I-LED) flowing across the light source, feeding back detection current (I-sense) corresponding to the output current (I-LED) to the microprogrammed control unit (MCU) and generating a control signal to the secondary voltage reduction unit (BUCK2) according to the detection current (I-sense), and regulated output current (I-LED) is output by the secondary voltage reduction unit (BUCK2).
Description
Technical field
The utility model relates to a kind of driver for lighting device.In addition, the utility model also relates to a kind of lighting device with this driver.
Background technology
As everyone knows, the LED illumination has irreplaceable advantage, and it saves the energy, super low-power consumption, and the electric light power transfer is near 100%, and identical illumination efficiency is more energy-conservation more than 80% than conventional light source, and its life-span is longer.In view of above advantage, people use LED more and more as light source, a large amount of PAR type that for example occurs on the present market, A type and MR type LED remodeling lamp.The remodeling lamp of these types need to drive by driver, usually is integrated with microcontroller in driver, and these microcontrollers use built-in comparator, with the switching mode output of control secondary pressure unit.Yet the uncertain time of delay of the automatic circuit break function of microcontroller and transformer, electric capacity equal error have caused relatively poor LED electric current output accuracy.
A kind of led driver with microcontroller during prior art provides, this driver is a kind of pair of buck topology structure, the one-level pressure unit can be realized stable output voltage, and the secondary pressure unit has the PWM output of fixed frequency.The PWM duty ratio is determined by sampling resistor, in case the electric current of the CS pin of the comparator of microcontroller is higher than the fixing electric current with reference to pin, comparator will cut off the PWM output of secondary pressure unit so.Yet microcontroller can not directly obtain load current, namely as electric current I-LED of the LED of light source.In other words, different microcontrollers has different time of delay when automatic disconnection PWM exports, so the electric current of CS pin is different, and the electric current of LED output also is different.Because the tolerance of inductor and other electronic devices, the tolerance of LED output current may fluctuate in positive and negative 20% scope.
The utility model content
For solving the problems of the technologies described above, the utility model proposes a kind of driver for lighting device, this driver can indirect detection as the light source of load, especially the output current of LED, and feed back to microcontroller, thereby obtain high-precision load output current, the while is simple in structure according to driver of the present utility model, and cost is cheaper.
First purpose of the present utility model realizes thus by a kind of driver for lighting device, and namely this driver comprises: rectification unit is connected to the one-level pressure unit of the output of rectification unit; Be connected to the secondary pressure unit of the output of one-level pressure unit; And the microcontroller that is connected to respectively one-level pressure unit and secondary pressure unit, the light source of lighting device is connected to the output of secondary pressure unit, wherein, driver also comprises current detecting unit, current detecting unit is connected to the light source negative pole end, current detecting unit detects the output current of the light source of flowing through, and detection current feedback that will be corresponding with output current is to microcontroller, microcontroller generates control signal to the secondary pressure unit according to detecting electric current, the output current of secondary pressure unit output through adjusting.Can the high lateral load output current of direct-detection and offer microcontroller according to driver of the present utility model, be used for adjusting fiducial value, then correspondingly change fiducial value by (PWM and RC FILTER TO CONTROL), correction has different MCU automatic shutdown fiducial value and the induction tolerance of time of delay, and this produces high-precision load output current.
According to the utility model proposes, current detecting unit comprises: supply module; Compare adjusting module; Amplification module; And sampling module, wherein, the supply power voltage of supply module output offers respectively comparison adjusting module and amplification module, amplification module is exported amplified current after the image current of self-powered module amplifies prearranged multiple in the future, amplified current converts the first comparative voltage to, compare the second comparative voltage that adjusting module compares the first comparative voltage and changed by output current, and simultaneously image current is not adjusted to and the proportional relation of output current at the first comparative voltage and the second comparative voltage, sampling module obtains to detect electric current and export to microcontroller according to the amplified current after adjusting.Because amplified current should be followed output current, therefore image current is adjusted to when concerning with output current is proportional, both can obtain to represent by sampling module the image current of output current, thereby make microcontroller correspondingly adjust reference data, and then control secondary pressure unit is exported high-precision load output current.
Preferably, the secondary pressure unit comprises: the first diode; The first capacitor; The first inductor; The first transistor; And first resistance, wherein, the negative pole of the first diode is connected to the output of one-level pressure unit, the positive pole of the first capacitor is connected to the negative pole of the first diode and the positive terminal of light source, the negative pole of the first capacitor is connected to an end of the first inductor, the negative pole end of light source is connected to the negative pole of the first capacitor and an end of the first inductor, the other end of the first inductor is connected to the work electrode of the first transistor, the positive pole of the first diode is connected to the other end of the first inductor and the work electrode of the first transistor, the control electrode of the first transistor is connected to the control output end of microcontroller, and the reference electrode of the first transistor is by the first grounding through resistance.In design of the present utility model, by the duty ratio of control the first transistor, can accurately control the output current of secondary pressure unit output.
Advantageously, supply module comprises voltage regulator and the second resistance, and wherein the input of voltage regulator is connected to the positive terminal of light source by the second resistance, and the output of voltage regulator is connected to respectively comparison adjusting module and amplification module.Voltage regulator is from the output power taking of secondary pressure unit, thereby for adjusting module relatively provides driving voltage, and be provided for producing the image current of amplified current for amplification module.
Optionally, supply module comprises: voltage regulator; The second resistance; The second capacitor; The 3rd capacitor; The second diode and the 3rd diode, wherein, the input of voltage regulator is connected to the positive terminal of light source by the second resistance, the output of voltage regulator is connected to respectively comparison adjusting module and amplification module, the positive pole of the second diode is connected to the negative pole of the 3rd diode, the negative pole of the second diode is connected to the intermediate node between the input of the second resistance and voltage regulator, the plus earth of the 3rd diode, the output that the first inductor tap is told is connected to the negative pole of anodal and the 3rd diode of the second diode by the second capacitor, one end of the 3rd capacitor is connected to the intermediate node between the input of the second resistance and voltage regulator, the other end ground connection of the 3rd capacitor.As an alternative of the supply module of describing before, supply module also can be directly power taking from the inductor.When the first inductor tap voltage was higher than the supply power voltage of voltage regulator, this tap voltage was through the second capacitor, and the second diode again to the 3rd capacitor, and offers voltage regulator.When the tap voltage of the first inductor is relatively hanged down, the second capacitor discharge, by the 3rd electric capacity, the 3rd diode and the second diode form discharge loop, give circuit supply.
According to the utility model proposes, relatively adjusting module comprises: the 3rd resistance; The 4th resistance; The 5th resistance; The 4th capacitor; The 5th capacitor; The first amplifier; And transistor seconds, wherein an end of the 3rd resistance is connected to the negative pole end of light source, the other end is connected to ground, one end of the 4th resistance is connected to the negative pole end of light source, the other end is connected to the inverting input of the first amplifier, the 4th capacitor connects between the inverting input and ground of the first amplifier, the output of the first amplifier is connected to the control electrode of transistor seconds, the normal phase input end of the first amplifier is by the 5th resistance and the 5th capacitor output that is connected to the first amplifier of series connection, the work electrode of transistor seconds is connected to the sampling input of sampling module, wherein, the feeder ear of the first amplifier is connected to the output of voltage regulator.In design of the present utility model, obtain the output current of high lateral load by the 4th resistance, this output current converts the second comparative voltage to by the 4th resistance, compares with the first comparative voltage from amplification module being used for.When the first comparative voltage and the second comparative voltage do not wait, the first amplifier output control signal, the switching time of control transistor seconds.
Preferably, amplification module comprises the 6th resistance; The 7th resistance; The 8th resistance; The 9th resistance; The tenth resistance; The 11 resistance; The 12 resistance; And second amplifier, wherein, one end of the 6th resistance is connected to the output of voltage regulator, the other end is connected to an end of the 7th resistance, the other end of the 7th resistance is connected to the reference electrode of transistor seconds, the 8th resistance is connected between the normal phase input end of intermediate node between the 7th resistance and the 6th resistance and the second amplifier, the tenth resistance is connected between the intermediate node and ground between the normal phase input end of the 8th resistance and the second amplifier, the 9th resistance is connected between the inverting input of intermediate node between the reference electrode of the other end of the 7th resistance and transistor seconds and the second amplifier, the output of the second amplifier is connected to the normal phase input end of the first amplifier by the 12 resistance, the 11 resistance is connected between the output and the intermediate node between the 12 resistance of intermediate node between the inverting input of the 9th resistance and the second amplifier and the second amplifier.Amplification module obtains image current from supply module by the 6th resistance and the 7th resistance, and this image current is amplified N doubly, and calculates first comparative voltage corresponding with this amplified current by the 12 ohmer.In normal situation, the first comparative voltage should equal the second comparative voltage.When the two does not wait, the switching time of transistor seconds is adjusted, and then has adjusted the electric current that flows through the 7th resistance, equates with image current after doubly thereby make the electric current of the 7th resistance be exaggerated N, can determine thus, the electric current that flows through the 7th resistance is directly related with the output current of high lateral load.
Further preferably, sampling module comprises: the 13 resistance; The 14 resistance; And the 6th capacitor, wherein the 13 resistance and the 14 resistance in series are connected between the work electrode and ground of transistor seconds, one end of the 6th capacitor is connected to the intermediate node between the 13 resistance and the 14 resistance, the other end is connected to ground, and the intermediate node between the 13 resistance and the 14 resistance is connected to the current detecting input of microcontroller.Sampling module offers microcontroller with the output current that collects, microcontroller is input to the value of reference voltage of the inverting input of its comparator according to this output current adjustment, thereby the Output rusults according to comparator sends control signal, with the duty ratio of adjustment the first transistor, and then accurately control the output current that the secondary pressure unit is exported.
Advantageously, the first capacitor is polar capacitor, and the second diode and the 3rd diode are voltage stabilizing didoes.
Another purpose of the present utility model realizes by lighting device, and this lighting device has light source and the above-mentioned type driver, and wherein this light source is led light source.
Description of drawings
Accompanying drawing consists of the part of this specification, is used for helping further to understand the utility model.These accompanying drawings illustrate embodiment of the present utility model, and are used for illustrating principle of the present utility model with specification.Identical parts represent with identical label in the accompanying drawings.Shown in the figure:
Fig. 1 shows the theory diagram according to driver of the present utility model;
Fig. 2 shows the schematic diagram according to the first embodiment of driver of the present utility model;
Fig. 3 shows the schematic diagram according to the second embodiment of driver of the present utility model.
Embodiment
Fig. 1 shows the theory diagram according to driver 100 of the present utility model, and as seen from the figure, this driver 100 comprises rectification unit 1, is connected to the one-level pressure unit BUCK1 of the output of rectification unit 1; Be connected to the secondary pressure unit BUCK2 of the output of one-level pressure unit BUCK1; And the microcontroller that is connected to respectively one-level pressure unit BUCK1 and secondary pressure unit BUCK2, the light source 2 of lighting device is connected to the output of secondary pressure unit BUCK2, wherein, driver 100 also comprises current detecting unit 3, and current detecting unit 3 is connected to light source 2 negative pole ends.
Further as seen, current detecting unit 3 comprises: supply module 31 from figure; Compare adjusting module 32; Amplification module 33; And sampling module 34, wherein, the supply power voltage VCC of supply module 31 outputs offers respectively comparison adjusting module 32 and amplification module 33, the amplification module 33 in the future image current I_sense_mirror of self-powered module 31 is exported amplified current I_amp after amplifying prearranged multiple N, amplified current I_amp converts the first comparative voltage V_COM1 to, compare the second comparative voltage V_COM2 that adjusting module 32 compares the first comparative voltage V_COM1 and changed by output current I_LED, and image current I_sense_mirror is not adjusted to output current I_LED simultaneously proportional relation at the first comparative voltage V_COM1 and the second comparative voltage V_COM2, sampling module 34 obtains to detect electric current I _ sense and export to microcontroller according to the image current I_sense_mirror after adjusting, microcontroller generates control signal to secondary pressure unit BUCK2 according to detecting electric current I _ sense, the output current I_LED of secondary pressure unit BUCK2 output through adjusting.
In addition, in a specific embodiment of the present utility model, light source 2 is led light source.
Fig. 2 shows the schematic diagram according to the first embodiment of driver 100 of the present utility model.The concrete structure of secondary pressure unit BUCK2 as can be seen from FIG., wherein, secondary pressure unit BUCK2 comprises: the first diode D1; The first capacitor C1; The first inductor L1; The first transistor Q1; And first resistance R 1, wherein, the negative pole of the first diode D1 is connected to the output of one-level pressure unit BUCK1, the positive pole of the first capacitor C1 is connected to the negative pole of the first diode D1 and the positive terminal of light source 2, the negative pole of the first capacitor C1 is connected to the end of the first inductor L1, the negative pole end of light source 2 is connected to the negative pole of the first capacitor C1 and the end of the first inductor L1, the other end of the first inductor L1 is connected to the work electrode of the first transistor Q1, the positive pole of the first diode D1 is connected to the other end of the first inductor L1 and the work electrode of the first transistor Q1, the control electrode of the first transistor Q1 is connected to the control output end PWM_Ctrl of microcontroller, and the reference electrode of the first transistor Q1 is by the first resistance R 1 ground connection.In the present embodiment, the first capacitor C1 is polar capacitor.
In the present embodiment, supply module 31 comprises voltage regulator U1 and the second resistance R 2, wherein the input of voltage regulator U1 is connected to the positive terminal of light source 2 by the second resistance R 2, and the output of voltage regulator U1 is connected to respectively comparison adjusting module 32 and amplification module 33.
Relatively adjusting module 32 comprises: the 3rd resistance R 3; The 4th resistance R 4; The 5th resistance R 5; The 4th capacitor C4; The 5th capacitor C5; The first amplifier U2A; And transistor seconds Q2, wherein an end of the 3rd resistance R 3 is connected to the negative pole end of light source 2, the other end is connected to ground, one end of the 4th resistance R 4 is connected to the negative pole end of light source 2, the other end is connected to the inverting input of the first amplifier U2A, the 4th capacitor C4 connects between the inverting input and ground of the first amplifier U2A, the output of the first amplifier U2A is connected to the control electrode of transistor seconds Q2, the normal phase input end of the first amplifier U2A is by the 5th resistance R 5 and the 5th capacitor C5 output that is connected to the first amplifier U2A of series connection, the work electrode of transistor seconds Q2 is connected to the sampling input of sampling module 34, wherein, the feeder ear of the first amplifier U2A is connected to the output of voltage regulator U1.
Amplification module 33 comprises the 6th resistance R 6; The 7th resistance R 7; The 8th resistance R 8; The 9th resistance R 9; The tenth resistance R 10; The 11 resistance R 11; The 12 resistance R 12; And the second amplifier U2B, wherein, one end of the 6th resistance R 6 is connected to the output of voltage regulator U1, the other end is connected to an end of the 7th resistance R 7, the other end of the 7th resistance R 7 is connected to the reference electrode of transistor seconds Q2, the 8th resistance R 8 is connected between the normal phase input end of intermediate node between the 7th resistance R 7 and the 6th resistance R 6 and the second amplifier U2B, the tenth resistance R 10 is connected between the intermediate node and ground between the normal phase input end of the 8th resistance R 8 and the second amplifier U2B, the 9th resistance R 9 is connected between the inverting input of intermediate node between the reference electrode of the other end of the 7th resistance R 7 and transistor seconds Q2 and the second amplifier U2B, the output of the second amplifier U2B is connected to the normal phase input end of the first amplifier U2A by the 12 resistance R 12, the 11 resistance R 11 is connected between the output and the intermediate node between the 12 resistance R 12 of intermediate node between the inverting input of the 9th resistance R 9 and the second amplifier U2B and the second amplifier U2B.
Sampling module 34 comprises: the 13 resistance R 13; The 14 resistance R 14; And the 6th capacitor C6, wherein the 13 resistance R 13 and the 14 resistance R 14 are connected in series between the work electrode and ground of transistor seconds Q2, the end of the 6th capacitor C6 is connected to the intermediate node between the 13 resistance R 13 and the 14 resistance R 14, the other end is connected to ground, and the intermediate node between the 13 resistance R 13 and the 14 resistance R 14 is connected to the current detecting input of microcontroller.
Fig. 3 shows the schematic diagram according to the second embodiment of driver 100 of the present utility model, and the unique difference of the first embodiment shown in this second embodiment and Fig. 1 is supply module 31.In the present embodiment, supply module 31 comprises: voltage regulator U1; The second resistance R 2; The second capacitor C2; The 3rd capacitor C3; The second diode D2 and the 3rd diode D3, wherein, the input of voltage regulator U1 is connected to the positive terminal of light source 2 by the second resistance R 2, the positive pole of the second diode D2 is connected to the negative pole of the 3rd diode D3, the negative pole of the second diode D2 is connected to the intermediate node between the input of the second resistance R 2 and voltage regulator U1, the plus earth of the 3rd diode D3, the output that the first inductor L1 tap is told is connected to the negative pole of anodal and the 3rd diode D3 of the second diode D2 by the second capacitor C2, the end of the 3rd capacitor C3 is connected to the intermediate node between the input of the second resistance R 2 and voltage regulator U1, the other end ground connection of the 3rd capacitor C3.In the present embodiment, the second diode D2 and the 3rd diode D3 are voltage stabilizing didoe.In addition, in the present embodiment, supply module 31 is directly from the upper power taking of the first inductor L1.When the tap voltage of the first inductor L1 was higher than the supply power voltage VCC of voltage regulator U1, this tap voltage was through the second capacitor C2, and the second diode D2 again to the 3rd capacitor C3, and offers voltage regulator U1.When the tap voltage of the first inductor L1 was relatively hanged down, the second capacitor C2 discharge formed discharge loop by the 3rd capacitor C 3, the three diode D3 and the second diode D2, gives circuit supply.
Next the operation principle of driver 100 of the present utility model is described with reference to accompanying drawing.As shown in the figure, detect high lateral load output current I_LED by the 3rd resistance R 3, it offers the normal phase input end of the first amplifier U2A.Simultaneously, by the image current I_sense_mirror of the 7th resistance R 7 monitorings from supply module 31, the second amplifier U2B amplifies N doubly with it, for example 10 times, yet export to the first amplifier U2A inverting input, if normal phase input end is not equal to inverting input, the output of the first amplifier U2A is exported control signal so, adjust transistor seconds Q2, to change image current I_sense_mirror, in steady state, normal phase input end is followed inverting input, this means I_LED*R3=10* (I_sense_mirror*R7).
The control electrode current Ib that can ignore transistor seconds Q2, work electrode electric current I c ≈ reference electrode electric current I e so, it has I_sense=I_sense_mirror,
Hence one can see that, I_LED*R3=10* (I_sense*R7), and then derive
I_LED=a*I_sense(is a=10*R7/R3 wherein).
Therefore, we only need to detect the voltage I_sense*R14 that offers microcontroller, then correspondingly adjust the reference voltage ref of the comparator of microcontroller, thereby adjust the duty ratio of the first transistor Q1 among the secondary reduction voltage circuit BUCK2, to revise and to proofread and correct the I_LED output current, make it have high-precision LED electric current output.
Be preferred embodiment of the present utility model only below, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All any modifications of within spirit of the present utility model and principle, doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Reference number
1 rectification unit
2 light sources
3 current detecting units
31 supply modules
32 compare adjusting module
33 amplification modules
34 sampling modules
The VCC supply power voltage
V_COM1 the first comparative voltage
V_COM2 the second comparative voltage
The I_sense_mirror image current
The I_LED output current
The I_amp amplified current
I_sense_input current detecting input
The MCU microcontroller
BUCK1 one-level pressure unit
BUCK2 secondary pressure unit
D1 the first diode
D2 the second diode
D3 the 3rd diode
C1 the first capacitor
C2 the second capacitor
C3 the 3rd capacitor
C4 the 4th capacitor
C5 the 5th capacitor
C6 the 6th capacitor
L1 the first inductor
The Q1 the first transistor
The Q2 transistor seconds
R1 the first resistance
R2 the second resistance
R3 the 3rd resistance
R4 the 4th resistance
R5 the 5th resistance
R6 the 6th resistance
R7 the 7th resistance
R8 the 8th resistance
R9 the 9th resistance
R10 the tenth resistance
R11 the 11 resistance
R12 the 12 resistance
R13 the 13 resistance
R14 the 14 resistance
The U1 voltage regulator
U2A the first amplifier
U2B the second amplifier
100 drivers
Claims (12)
1. driver (100) that is used for lighting device comprising: rectification unit (1) is connected to the one-level pressure unit (BUCK1) of the output of described rectification unit (1); Be connected to the secondary pressure unit (BUCK2) of the output of described one-level pressure unit (BUCK1); And the microcontroller (MCU) that is connected to respectively described one-level pressure unit (BUCK1) and described secondary pressure unit (BUCK2), the light source of described lighting device (2) is connected to the output of described secondary pressure unit (BUCK2); It is characterized in that, described driver (100) also comprises current detecting unit (3), described current detecting unit (3) is connected to described light source (2) negative pole end, described current detecting unit (3) detects the output current (I_LED) of described light source (2) of flowing through, and detection electric current (I_sense) that will be corresponding with described output current (I_LED) feeds back to described microcontroller (MCU), described microcontroller (MCU) generates control signal to described secondary pressure unit (BUCK2) according to described detection electric current (I_sense), the described output current (I_LED) of described secondary pressure unit (BUCK2) output through adjusting.
2. driver according to claim 1 (100) is characterized in that, described current detecting unit (3) comprising: supply module (31); Compare adjusting module (32); Amplification module (33); And sampling module (34), wherein, the supply power voltage (VCC) of described supply module (31) output offers respectively described relatively adjusting module (32) and described amplification module (33), described amplification module (33) will be exported amplified current (I_amp) after will amplifying prearranged multiple (N) from the image current (I_sense_mirror) of described supply module (31), described amplified current (I_amp) converts the first comparative voltage (V_COM1) to, described relatively adjusting module (32) more described the first comparative voltages (V_COM1) and the second comparative voltage (V_COM2) of being changed by described output current (I_LED), and described image current (I_sense_mirror) is not adjusted to and the proportional relation of described output current (I_LED) simultaneously at described the first comparative voltage (V_COM1) and described the second comparative voltage (V_COM2), described sampling module (34) obtains described detection electric current (I_sense) and exports to described microcontroller (MCU) according to the described amplified current (I_amp) after adjusting.
3. driver according to claim 2 (100) is characterized in that, described secondary pressure unit (BUCK2) comprising: the first diode (D1); The first capacitor (C1); The first inductor (L1); The first transistor (Q1); And first resistance (R1), wherein, the negative pole of described the first diode (D1) is connected to the output of described one-level pressure unit (BUCK1), the positive pole of described the first capacitor (C1) is connected to the negative pole of described the first diode (D1) and the positive terminal of described light source (2), the negative pole of described the first capacitor (C1) is connected to an end of described the first inductor (L1), the negative pole end of described light source (2) is connected to the negative pole of described the first capacitor (C1) and an end of described the first inductor (L1), the other end of described the first inductor (L1) is connected to the work electrode of described the first transistor (Q1), the positive pole of described the first diode (D1) is connected to the other end of described the first inductor (L1) and the work electrode of described the first transistor (Q1), the control electrode of described the first transistor (Q1) is connected to the control output end (PWM_Ctrl) of described microcontroller (MCU), and the reference electrode of described the first transistor (Q1) is by described the first resistance (R1) ground connection.
4. driver according to claim 3 (100), it is characterized in that, described supply module (31) comprises voltage regulator (U1) and the second resistance (R2), the input of wherein said voltage regulator (U1) is connected to the positive terminal of described light source (2) by described the second resistance (R2), the output of described voltage regulator (U1) is connected to respectively described relatively adjusting module (32) and described amplification module (33).
5. driver according to claim 3 (100) is characterized in that, described supply module (31) comprising: voltage regulator (U1); The second resistance (R2); The second capacitor (C2); The 3rd capacitor (C3); The second diode (D2) and the 3rd diode (D3), wherein, the input of described voltage regulator (U1) is connected to the positive terminal of described light source (2) by described the second resistance (R2), the output of described voltage regulator (U1) is connected to respectively described relatively adjusting module (32) and described amplification module (33), the positive pole of described the second diode (D2) is connected to the negative pole of described the 3rd diode (D3), the negative pole of described the second diode (D2) is connected to the intermediate node between the input of described the second resistance (R2) and described voltage regulator (U1), the plus earth of described the 3rd diode (D3), the output that described the first inductor (L1) tap is told is connected to the negative pole of anodal and described the 3rd diode (D3) of described the second diode (D2) by the second capacitor (C2), one end of described the 3rd capacitor (C3) is connected to the intermediate node between the input of described the second resistance (R2) and described voltage regulator (U1), the other end ground connection of described the 3rd capacitor (C3).
6. according to claim 4 or 5 described drivers (100), it is characterized in that, described relatively adjusting module (32) comprising: the 3rd resistance (R3); The 4th resistance (R4); The 5th resistance (R5); The 4th capacitor (C4); The 5th capacitor (C5); The first amplifier (U2A); And transistor seconds (Q2), one end of wherein said the 3rd resistance (R3) is connected to the negative pole end of described light source (2), the other end is connected to ground, one end of described the 4th resistance (R4) is connected to the negative pole end of described light source (2), the other end is connected to the inverting input of described the first amplifier (U2A), described the 4th capacitor (C4) is connected between the inverting input and ground of described the first amplifier (U2A), the output of described the first amplifier (U2A) is connected to the control electrode of described transistor seconds (Q2), the normal phase input end of described the first amplifier (U2A) is by described the 5th resistance (R5) and described the 5th capacitor (C5) output that is connected to described the first amplifier (U2A) of series connection, the work electrode of described transistor seconds (Q2) is connected to the sampling input of described sampling module (34), wherein, the feeder ear of described the first amplifier (U2A) is connected to the output of described voltage regulator (U1).
7. driver according to claim 6 (100) is characterized in that, described amplification module (33) comprises the 6th resistance (R6); The 7th resistance (R7); The 8th resistance (R8); The 9th resistance (R9); The tenth resistance (R10); The 11 resistance (R11); The 12 resistance (R12); And second amplifier (U2B), wherein, one end of described the 6th resistance (R6) is connected to the output of described voltage regulator (U1), the other end is connected to an end of described the 7th resistance (R7), the other end of described the 7th resistance (R7) is connected to the reference electrode of described transistor seconds (Q2), described the 8th resistance (R8) is connected between the normal phase input end of intermediate node between described the 7th resistance (R7) and described the 6th resistance (R6) and described the second amplifier (U2B), described the tenth resistance (R10) is connected between the intermediate node and ground between the normal phase input end of described the 8th resistance (R8) and described the second amplifier (U2B), described the 9th resistance (R9) is connected between the inverting input of intermediate node between the reference electrode of the other end of described the 7th resistance (R7) and described transistor seconds (Q2) and described the second amplifier (U2B), the output of described the second amplifier (U2B) is connected to the normal phase input end of described the first amplifier (U2A) by the 12 resistance (R12), described the 11 resistance (R11) is connected between the output and the intermediate node between described the 12 resistance (R12) of intermediate node between the inverting input of described the 9th resistance (R9) and described the second amplifier (U2B) and described the second amplifier (U2B).
8. driver according to claim 6 (100) is characterized in that, described sampling module (34) comprising: the 13 resistance (R13); The 14 resistance (R14); And the 6th capacitor (C6), wherein said the 13 resistance (R13) and described the 14 resistance (R14) are connected in series between the work electrode and ground of described transistor seconds (Q2), one end of described the 6th capacitor (C6) is connected to the intermediate node between described the 13 resistance (R13) and described the 14 resistance (R14), the other end is connected to ground, and the intermediate node between described the 13 resistance (R13) and described the 14 resistance (R14) is connected to the current detecting input (I_sense_input) of described microcontroller (MCU).
According to claim 4 or 5 described drivers (100) it is characterized in that, described the first capacitor (C1) is polar capacitor.
10. driver according to claim 5 (100) is characterized in that, described the second diode (D2) and described the 3rd diode (D3) are voltage stabilizing didoes.
11. a lighting device is characterized in that, comprises light source (2) and each described driver (100) in 10 according to claim 1.
12. lighting device according to claim 11 is characterized in that, described light source (2) is led light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402408 CN202750290U (en) | 2012-08-14 | 2012-08-14 | Driver for lighting device and lighting device with driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402408 CN202750290U (en) | 2012-08-14 | 2012-08-14 | Driver for lighting device and lighting device with driver |
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| Publication Number | Publication Date |
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| CN202750290U true CN202750290U (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220402408 Expired - Fee Related CN202750290U (en) | 2012-08-14 | 2012-08-14 | Driver for lighting device and lighting device with driver |
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| Country | Link |
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| CN (1) | CN202750290U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048804A (en) * | 2014-05-09 | 2015-11-11 | 安德烈·斯蒂尔股份两合公司 | Capacitor power supply unit for small electrical loads with a high current requirement |
-
2012
- 2012-08-14 CN CN 201220402408 patent/CN202750290U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048804A (en) * | 2014-05-09 | 2015-11-11 | 安德烈·斯蒂尔股份两合公司 | Capacitor power supply unit for small electrical loads with a high current requirement |
| CN105048804B (en) * | 2014-05-09 | 2019-10-25 | 安德烈·斯蒂尔股份两合公司 | Capacitor-type power supply for the small-sized customer with high current demand |
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