CN112188688A - LED lamp - Google Patents
LED lamp Download PDFInfo
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- CN112188688A CN112188688A CN202010942100.1A CN202010942100A CN112188688A CN 112188688 A CN112188688 A CN 112188688A CN 202010942100 A CN202010942100 A CN 202010942100A CN 112188688 A CN112188688 A CN 112188688A
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- led lamp
- electrically connected
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- capacitor
- led
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- 238000004146 energy storage Methods 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 49
- 238000005070 sampling Methods 0.000 claims description 23
- 230000001629 suppression Effects 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 238000009499 grossing Methods 0.000 abstract description 3
- 230000035772 mutation Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/345—Current stabilisation; Maintaining constant current
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses an LED lamp which comprises an LED lamp string, a fly-wheel diode, an energy storage inductor, a rectifying structure and a constant current control chip, wherein the LED lamp string and the energy storage inductor are electrically connected in series and then are electrically connected in parallel together on the fly-wheel diode, the fly-wheel diode is electrically connected with the constant current control chip, and the fly-wheel diode and the constant current control chip are both electrically connected with the rectifying structure. The LED lamp string has the advantages that the energy storage inductor is arranged, the self-induced electromotive force for blocking current change can be generated, the LED lamp string is prevented from generating voltage and current mutation and playing a role of smoothing current, meanwhile, the follow current diode is also arranged, the voltage and current mutation can be prevented, the LED lamp string is further prevented from being damaged due to the current and voltage mutation, and the LED lamp string is suitable for being used by a large number of LED lamp strings.
Description
Technical Field
The invention relates to the field of lamp design, in particular to an LED lamp.
Background
The lamp is a common lighting product, the LED lamp is the most common one of the lamps, the LED lamp is usually required to be connected into a circuit to obtain power supply, and when the number of the LED lamps is small, the LED lamp is usually connected into the circuit simply because the power supply requirement is not high.
However, as the demand of people increases, sometimes a plurality of LED lamps are required to perform lighting work simultaneously, if the number of the LED lamps exceeds 60, the power supply requirement for the LED lamps is also correspondingly improved, the conventional simple LED lamp access circuit is often difficult to ensure the simultaneous working requirement of a large number of LED lamps, especially when the current and voltage change is large in a moment, such as the switch of a power supply, the LED lamps are easily damaged, and the use requirement of people is difficult to meet.
On the other hand, the light efficiency of the access circuit of the conventional LED lamp is not high, the energy consumption is high, and particularly, when a large number of LED lamps work, the problem is more prominent, and great waste is caused to resources.
Disclosure of Invention
It is an object of the present invention to provide an LED lamp that solves one or more of the above mentioned problems.
According to one aspect of the invention, the LED lamp comprises an LED lamp string, a fly-wheel diode, an energy storage inductor, a rectifying structure and a constant current control chip, wherein the LED lamp string and the energy storage inductor are electrically connected in series and then are electrically connected to the fly-wheel diode in parallel, the fly-wheel diode is electrically connected with the constant current control chip, and the fly-wheel diode and the constant current control chip are both electrically connected with the rectifying structure.
The invention has the beneficial effects that: in the invention, the rectifying structure is convenient for the input current form to be suitable for the work of the LED lamp string, the work reliability of the LED lamp string is ensured, and the self-induction electromotive force for blocking the current change can be generated by arranging the energy storage inductor, so that the voltage and current sudden change of the LED lamp string is avoided, the effect of smoothing the current is realized, meanwhile, the follow current diode is also arranged, the voltage and current sudden change can be prevented, the damage of the LED lamp string caused by the current and voltage sudden change is further avoided, and the LED lamp string can be suitable for a large number of LED lamp strings. And the invention also arranges a constant current control chip, which can effectively maintain the stability of the working current of the LED lamp string, so as to obtain high luminous efficiency and reduce the waste of resources.
In some embodiments, the LED light string includes k LED light string branches, the LED light string branches include n unit LED light strings, n unit LED light strings are electrically connected in series, k LED light string branches are electrically connected in parallel, the k value is greater than or equal to 1, and the n value is 60 to 72. Therefore, the LED lamp string can adapt to various requirements of users so as to be suitable for different use scenes, and experiments show that the LED lamp string provided by the invention has excellent lighting effect and energy consumption when the LED lamp string comprises the LED lamp string branches and the unit LED lamp strings in the number.
In some embodiments, the rectifying structure includes a rectifying diode group, a first polarity capacitor and an inductor, the rectifying diode group includes four sequentially connected rectifying diodes, one end of the rectifying diode group, the inductor and one end of the first polarity capacitor are sequentially electrically connected, and the other end of the first polarity capacitor is electrically connected to the other end of the rectifying diode group. Therefore, the rectifying structure adopts a bridge structure, and can effectively rectify the input current so as to ensure that the input current can meet the use requirement of the LED lamp string.
In some embodiments, the present invention further comprises an emi suppression structure electrically connected to the LED string in parallel. The structure for inhibiting electromagnetic interference can effectively reduce the influence of electromagnetic interference on the LED lamp string and the environment, and improve the working reliability of the LED lamp string.
In some embodiments, the emi suppression structure includes a second polarity capacitor, a first resistor, and a first capacitor, wherein the second polarity capacitor is electrically connected to the LED string in parallel, and the first resistor and the first capacitor are electrically connected in parallel and then connected in parallel to the second polarity capacitor. The second polar capacitor and the first capacitor can effectively filter out high-frequency disturbance on the circuit through the filtering action of the first capacitor and the second capacitor.
In some embodiments, the present invention further comprises a second capacitor, and the electromagnetic interference suppressing structure is electrically connected to the second capacitor.
In some embodiments, the present invention further includes a power adjustment structure electrically connected to the constant current control chip. The power adjusting structure can conveniently adjust the power of the LED lamp string, so that the brightness of the LED lamp string is adjusted.
In some embodiments, the power adjustment structure includes a first sampling resistor and a second sampling resistor, the first sampling resistor is electrically connected to the second sampling resistor in parallel, and the first sampling resistor is electrically connected to the constant current control chip. The first sampling resistor and the second sampling resistor can be used for sampling current and voltage in the circuit conveniently, so that the constant current control chip can adjust working current and voltage of the LED lamp string conveniently, and the power of the constant current control chip can meet the requirements of users.
In some embodiments, the present invention further comprises a third capacitor electrically connected in parallel to the freewheeling diode. The arrangement of the third capacitor can protect the freewheeling diode and reduce the interference of the freewheeling diode to other structures.
Drawings
Fig. 1 is a schematic circuit diagram of an LED lamp according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of an LED light string according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of an LED light string according to an embodiment of the invention.
Fig. 4 is a circuit diagram of an LED light string according to an embodiment of the invention.
Fig. 5 is a circuit diagram of an LED light string according to an embodiment of the invention.
In the figure: the LED lamp string comprises an LED lamp string, 2 freewheeling diodes, 3 energy storage inductors, 4 rectifying structures, 5 constant current control chips, 11 LED lamp string branches, 12 unit LED lamp strings, 41 rectifying diode groups, 42 inductors, 43 first polarity capacitors, 44 third resistors, 411 rectifying diodes, 6 electromagnetic interference suppression structures, 61 second polarity capacitors, 62 first resistors, 63 first capacitors, 7 second capacitors, 8 power adjustment structures, 81 first sampling resistors, 82 second sampling resistors, 9 third capacitors, 10 second resistors, 20 fourth capacitors, 30 piezoresistors, 40 fourth resistors and 50 fuses.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
Referring to fig. 1 and 2, an LED lamp of the present embodiment includes an LED string 1, a freewheeling diode 2, an energy storage inductor 3, a rectifying structure 4, and a constant current control chip 5.
The LED string 1 may include k LED string branches 11, and each LED string branch 11 may include n unit LED strings 12, where n may be an integer from 60 to 72, k may be an integer greater than or equal to 1, and is particularly preferably an integer from 1 to 4, in this embodiment, the number of LED string branches 11 is preferably 1, and the number of unit LED strings 12 is preferably 60. The 60 unit LED lamp strings 12 are electrically connected in series, and the LED lamp string 1 is electrically connected with the energy storage inductor 3.
And the LED lamp string 1 and the energy storage inductor 3 are electrically connected and then electrically connected to the fly-wheel diode 2 in a common parallel mode.
The constant current control chip 5 can be a commercially available BP2866 chip, which contains a CS pin, two DRAIN pins, an HV pin, an NC pin, an ROVP pin, a GND pin, and the like. And the GND pin of the constant current control chip 5 is connected with the negative electrode, the NC pin can be left empty, and the freewheeling diode 2 is electrically connected with the two DRAIN pins on the constant current control chip 5.
The rectifying structure 4 includes a rectifying diode group 41, an inductor 42, and a first polarity capacitor 43, where the rectifying diode group 41 includes four rectifying diodes 411 electrically connected in sequence, one end of the rectifying diode group 41 is electrically connected to one end of the inductor 42, the other end of the inductor 42 is electrically connected to one end of the first polarity capacitor 43, the other end of the first polarity capacitor 43 is electrically connected to the other end of the rectifying diode group 41, and the end of the first polarity capacitor 43 connected to the rectifying diode group 41 is connected to the negative electrode.
The rectifying structure 4 may further include a third resistor 44, and the third resistor 44 is electrically connected to the inductor 42 in parallel, so as to protect the inductor 42.
The rectifying structure 4 is further electrically connected with the HV pin of the constant current control chip 5, so that when the external circuit is connected, the external circuit can supply power to the constant current control chip 5 through the rectifying structure 4.
The LED lamp of the present embodiment further includes an electromagnetic interference suppressing structure 6, where the electromagnetic interference suppressing structure 6 includes a second polarity capacitor 61, a first resistor 62 and a first capacitor 63, the second polarity capacitor 61 is electrically connected to the LED lamp string 1 in parallel, the first resistor 62 and the first capacitor 63 are electrically connected in parallel, and after the first resistor 62 and the first capacitor 63 are connected, they are connected in parallel to the second polarity capacitor 61.
The LED lamp of this embodiment further includes a second capacitor 7, one end of the second capacitor 7 is connected to the negative electrode, and the other end is electrically connected to the electromagnetic interference suppression structure 6, that is, the electromagnetic interference suppression structure 6 is connected to the negative electrode through the second capacitor 7.
The LED lamp of this embodiment further includes a power adjustment structure 8, where the power adjustment structure 8 includes a first sampling resistor 81 and a second sampling resistor 82, the first sampling resistor 81 is electrically connected to the second sampling resistor 82 in parallel, one end of the first sampling resistor 81 is electrically connected to the CS pin of the constant current control chip 5, and the other end of the first sampling resistor 81 is connected to the negative electrode.
The LED lamp of this embodiment further includes a third capacitor 9, and the third capacitor 9 is electrically connected to the freewheeling diode 2 in parallel to protect the freewheeling diode 2.
The LED lamp of this embodiment further includes a second resistor 10, one end of the second resistor 10 is electrically connected to the ROVP pin of the constant current control chip 5, the other end of the second resistor 10 is connected to the negative electrode, and the second resistor 10 can perform an overvoltage protection function.
When the LED lamp of this embodiment is in use, through rectification structure 4 can with external circuit electric connection for the external circuit supplies power for this LED lamp, makes LED lamp cluster 1 carry out luminous work. In addition, in order to further ensure the safety of the external circuit connected thereto, a fourth capacitor 20, a voltage dependent resistor 30, a fourth resistor 40 and a fuse 50 can be connected between the external circuit and the rectifying structure 4.
The rectifying structure 4 can rectify the current input by the external circuit, so that the current form can meet the use of the LED lamp string 1.
The energy storage inductor 3 can generate self-induced electromotive force for blocking current change, namely, when the current is increased, the self-induced electromotive force of the energy storage inductor 3 is opposite to the original current direction, and when the current is decreased, the direction of the self-induced electromotive force of the energy storage inductor 3 is the same as the original current direction. Therefore, the current passing through the LED lamp string 1 is prevented from sudden change, the function of smoothing the current is achieved, and the condition that the LED lamp string is damaged due to sudden change of current and voltage is avoided. The freewheeling diode 2 arranged in parallel can also prevent voltage and current from suddenly changing, further avoid the LED lamp string 1 from being damaged due to sudden change of current and voltage, and is particularly suitable for the use of a large number of LED lamp strings 1.
In addition, when the user adjusts the external input current and voltage to change the size of the LED light string 1, the first sampling resistor 81 and the second sampling resistor 82 can sample the current and voltage in the circuit, so that the constant current control chip 5 can timely adjust the working current and voltage of the LED light string 1, and the power of the constant current control chip can meet the requirements of the user.
Example 2
Referring to fig. 1 and 3, the LED lamp of the present embodiment has the same structure as the LED lamp of embodiment 1 except that the structure of the LED lamp string 1 is different, and the structure of each component and the relation between each component, including the relation between the LED lamp string 1 and other components, are the same as those of the LED lamp of embodiment 1.
The LED light string 1 of the present embodiment includes LED light string branches 11, the number of the LED light string branches 11 is preferably 2, each LED light string branch 11 preferably includes 65 unit LED light strings 12, the 65 unit LED light strings 12 in each LED light string branch 11 are electrically connected in series, and the 2 LED light string branches 11 are electrically connected in parallel.
Example 3
Referring to fig. 1 and 4, the LED lamp of the present embodiment has the same structure as the LED lamp of embodiment 1 except that the structure of the LED lamp string 1 is different, and the structure of each component and the relation between each component, including the relation between the LED lamp string 1 and other components, are the same as those of the LED lamp of embodiment 1.
The LED light string 1 of the present embodiment includes LED light string branches 11, the number of the LED light string branches 11 is preferably 3, each LED light string branch 11 preferably includes 70 unit LED light strings 12, the 70 unit LED light strings 12 in each LED light string branch 11 are electrically connected in series, and the 3 LED light string branches 11 are electrically connected in parallel.
Example 4
Referring to fig. 1 and 5, the LED lamp of the present embodiment has the same structure as the LED lamp of embodiment 1 except that the structure of the LED lamp string 1 is different, and the structure of each component and the relation between each component, including the relation between the LED lamp string 1 and other components, are the same as those of the LED lamp of embodiment 1.
The LED light string 1 of the present embodiment includes LED light string branches 11, the number of the LED light string branches 11 is preferably 4, each LED light string branch 11 preferably includes 72 unit LED light strings 12, the 72 unit LED light strings 12 in each LED light string branch 11 are electrically connected in series, and the 4 LED light string branches 11 are electrically connected in parallel.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (9)
- The LED lamp is characterized by comprising an LED lamp string, a fly-wheel diode, an energy storage inductor, a rectifying structure and a constant current control chip, wherein the LED lamp string and the energy storage inductor are electrically connected in series and then are electrically connected in parallel together on the fly-wheel diode, the fly-wheel diode is electrically connected with the constant current control chip, and the fly-wheel diode and the constant current control chip are electrically connected with the rectifying structure.
- 2. The LED lamp of claim 1, wherein the LED lamp string comprises k LED lamp string branches, the LED lamp string branches comprise n unit LED lamp strings, n unit LED lamp strings are electrically connected in series, k LED lamp string branches are electrically connected in parallel, the k value is greater than or equal to 1, and the n value is 60-72.
- 3. The LED lamp of claim 1, wherein the rectifying structure comprises a rectifying diode group, a first polarity capacitor and an inductor, the rectifying diode group comprises four sequentially connected rectifying diodes, one end of the rectifying diode group, the inductor and one end of the first polarity capacitor are sequentially electrically connected, and the other end of the first polarity capacitor is electrically connected with the other end of the rectifying diode group.
- 4. The LED lamp of claim 1, comprising an emi suppression structure electrically connected in parallel with the LED string.
- 5. The LED lamp of claim 4, wherein the EMI suppression structure comprises a second polarity capacitor, a first resistor and a first capacitor, the second polarity capacitor is electrically connected to the LED string in parallel, and the first resistor and the first capacitor are electrically connected in parallel and then connected in parallel to the second polarity capacitor.
- 6. The LED lamp of claim 4, comprising a second capacitor, wherein the EMI suppression structure is electrically connected to the second capacitor.
- 7. The LED lamp of claim 1, comprising a power adjustment structure electrically connected to the constant current control chip.
- 8. The LED lamp of claim 7, wherein the power adjustment structure comprises a first sampling resistor and a second sampling resistor, the first sampling resistor is electrically connected to the second sampling resistor in parallel, and the first sampling resistor is electrically connected to the constant current control chip.
- 9. The LED lamp of claim 1, comprising a third capacitor electrically connected in parallel to the freewheeling diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010942100.1A CN112188688A (en) | 2020-09-09 | 2020-09-09 | LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010942100.1A CN112188688A (en) | 2020-09-09 | 2020-09-09 | LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112188688A true CN112188688A (en) | 2021-01-05 |
Family
ID=73920278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010942100.1A Pending CN112188688A (en) | 2020-09-09 | 2020-09-09 | LED lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112188688A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283071A (en) * | 1999-08-01 | 2001-02-07 | 邓志雄 | Electromagnetic oven with electric power filter |
| CN201001023Y (en) * | 2007-01-15 | 2008-01-02 | 上海盛善电气有限公司 | Power supply protective circuit of apparatus instrument |
| CN104244482A (en) * | 2014-08-29 | 2014-12-24 | 广东瑞德智能科技股份有限公司 | Low-cost induction cooker EMC control circuit |
| CN204377201U (en) * | 2015-01-09 | 2015-06-03 | 嘉兴市光泰照明有限公司 | A kind of constant current driver circuit for LED and LED automobile illumination device |
| CN106332390A (en) * | 2015-06-30 | 2017-01-11 | 华润矽威科技（上海）有限公司 | Non-isolated LED constant-current driver chip, circuit and method |
| CN106505878A (en) * | 2016-11-02 | 2017-03-15 | 成都俊巡科技有限公司 | Power source drive device for inquiry system terminal |
| CN109195252A (en) * | 2018-09-21 | 2019-01-11 | 宁波多力浦工贸有限公司 | A kind of LED light control lamp control circuit |
| JP2019129156A (en) * | 2018-01-25 | 2019-08-01 | アビス カンパニー リミテッドＡｖｉｓ Ｃｏ．，Ｌｔｄ． | Stabilizer-compatible light-emitting diode lamp |
| CN210950975U (en) * | 2019-12-28 | 2020-07-07 | 广东信华电器有限公司 | Integrated down lamp |
| CN211240188U (en) * | 2019-12-31 | 2020-08-11 | 江西量一光电科技有限公司 | DOB integration LED constant current road |
| CN212413487U (en) * | 2020-09-09 | 2021-01-26 | 高达文科技控股有限公司 | LED lamp |
-
2020
- 2020-09-09 CN CN202010942100.1A patent/CN112188688A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283071A (en) * | 1999-08-01 | 2001-02-07 | 邓志雄 | Electromagnetic oven with electric power filter |
| CN201001023Y (en) * | 2007-01-15 | 2008-01-02 | 上海盛善电气有限公司 | Power supply protective circuit of apparatus instrument |
| CN104244482A (en) * | 2014-08-29 | 2014-12-24 | 广东瑞德智能科技股份有限公司 | Low-cost induction cooker EMC control circuit |
| CN204377201U (en) * | 2015-01-09 | 2015-06-03 | 嘉兴市光泰照明有限公司 | A kind of constant current driver circuit for LED and LED automobile illumination device |
| CN106332390A (en) * | 2015-06-30 | 2017-01-11 | 华润矽威科技（上海）有限公司 | Non-isolated LED constant-current driver chip, circuit and method |
| CN106505878A (en) * | 2016-11-02 | 2017-03-15 | 成都俊巡科技有限公司 | Power source drive device for inquiry system terminal |
| JP2019129156A (en) * | 2018-01-25 | 2019-08-01 | アビス カンパニー リミテッドＡｖｉｓ Ｃｏ．，Ｌｔｄ． | Stabilizer-compatible light-emitting diode lamp |
| CN109195252A (en) * | 2018-09-21 | 2019-01-11 | 宁波多力浦工贸有限公司 | A kind of LED light control lamp control circuit |
| CN210950975U (en) * | 2019-12-28 | 2020-07-07 | 广东信华电器有限公司 | Integrated down lamp |
| CN211240188U (en) * | 2019-12-31 | 2020-08-11 | 江西量一光电科技有限公司 | DOB integration LED constant current road |
| CN212413487U (en) * | 2020-09-09 | 2021-01-26 | 高达文科技控股有限公司 | LED lamp |
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