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CN-122026886-A - Magnetic induction switch and drawer lamp

CN122026886ACN 122026886 ACN122026886 ACN 122026886ACN-122026886-A

Abstract

The invention relates to the technical field of electronic circuits, in particular to a magnetic induction switch and a drawer lamp, which comprises an H-bridge control module, a first PMOS tube, a second PMOS tube, a first NMOS tube, a second NMOS tube and a magnetic reed switch, wherein the grid electrode of the first PMOS tube is connected with the grid electrode of the second PMOS tube, the grid electrode of the first NMOS tube is connected with the grid electrode of the second NMOS tube through the magnetic reed switch, the source electrode of the first PMOS tube is connected with the drain electrode of the first NMOS tube to serve as a first voltage end, the source electrode of the second PMOS tube is connected with the drain electrode of the second NMOS tube to serve as a second voltage end, the first voltage end and the second voltage end are connected with two-wire double-color-temperature lamp strips, the drain electrode of the first PMOS tube and the source electrode of the first NMOS tube are connected with the first signal output end of the H-bridge control module, the drain electrode of the second PMOS tube and the source electrode of the second NMOS tube are connected with the second signal output end of the H-bridge control module, the scheme not only greatly reduces the conduction loss, but also effectively solves the problem that the two-wire double-color-temperature lamp strips are not closed.

Inventors

  • YI RUNHUA

Assignees

  • 深圳市维盛泰光电有限公司

Dates

Publication Date
20260512
Application Date
20260112

Claims (10)

  1. 1. A magnetic induction switch is used in a two-wire double-color temperature lamp strip and is characterized by comprising an H-bridge control module, a first PMOS tube, a second PMOS tube, a first NMOS tube, a second NMOS tube and a magnetic reed switch, wherein the grid electrode of the first PMOS tube is connected with the grid electrode of the second PMOS tube, the grid electrode of the first NMOS tube is connected with the grid electrode of the second NMOS tube through the magnetic reed switch, the source electrode of the first PMOS tube is connected with the drain electrode of the first NMOS tube, the connection point is used as a first voltage end, the source electrode of the second PMOS tube is connected with the drain electrode of the second NMOS tube, the connection point is used as a second voltage end, the first voltage end and the second voltage end are both connected with the two-wire double-color temperature lamp strip, the drain electrode of the first PMOS tube and the source electrode of the first NMOS tube are both connected with a first signal output end of the H-bridge control module, and the drain electrode of the second PMOS tube and the source electrode of the second NMOS tube are both connected with a second signal output end of the H-bridge control module.
  2. 2. The magnetic induction switch of claim 1, wherein a first resistor and a second resistor are connected in series between the grid electrode of the first PMOS transistor and the grid electrode of the second PMOS transistor, a third resistor is arranged between the grid electrode of the first NMOS transistor and the reed switch, and a fourth resistor is arranged between the grid electrode of the second NMOS transistor and the reed switch.
  3. 3. The magnetic induction switch of claim 2, wherein a fifth resistor is arranged between the gate of the first PMOS transistor and the source of the first PMOS transistor, a sixth resistor is arranged between the gate of the second PMOS transistor and the source of the second PMOS transistor, a seventh resistor is arranged between the gate of the first NMOS transistor and the source of the first NMOS transistor, and an eighth resistor is arranged between the gate of the second NMOS transistor and the source of the second NMOS transistor.
  4. 4. The magnetic induction switch of claim 3, wherein the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor, and the eighth resistor have the same resistance values and are 360 Ω -400 Ω.
  5. 5. The magnetic induction switch of claim 1, wherein the first PMOS and the first NMOS are integrally packaged and employ NCE4503S chips.
  6. 6. The magnetic induction switch of claim 3, wherein the second PMOS and second NMOS are integrally packaged and employ NCE4503S chips.
  7. 7. The magnetic induction switch of claim 2, wherein said reed switch is normally closed.
  8. 8. The magnetic induction switch of claim 1, wherein the H-bridge control module comprises a controller, a third NMOS, a fourth NMOS, a fifth NMOS and a sixth NMOS, wherein the gates of the third NMOS, the fourth NMOS, the fifth NMOS and the sixth NMOS are all connected to the controller, the sources of the fourth NMOS and the sixth NMOS are connected to the drain of the H-bridge control module, the connection point is a first signal output end of the H-bridge control module, the sources of the third NMOS and the drain of the fifth NMOS are connected to the drain of the H-bridge control module, the connection point is a second signal output end of the H-bridge control module, the drains of the third NMOS and the fourth NMOS are all connected to an external power source, and the sources of the fifth NMOS and the sixth NMOS are all grounded.
  9. 9. The magnetic induction switch of claim 8, wherein the two-wire bi-color temperature strip comprises a first strip and a second strip, the positive pole of the first strip and the negative pole of the second strip being commonly connected and connected to the first voltage terminal, the negative pole of the first strip being commonly connected and connected to the positive pole of the second strip.
  10. 10. A drawer lamp, which is characterized by comprising a power supply, a two-wire double-color temperature lamp belt and the magnetic induction switch as claimed in any one of claims 1-9, wherein the power supply is connected with a voltage input end of the H-bridge control module, and the two-wire double-color temperature lamp belt is connected with the magnetic induction switch.

Description

Magnetic induction switch and drawer lamp Technical Field The invention relates to the technical field of electronic circuits, in particular to a magnetic induction switch and a drawer lamp. Background The magnetic induction switch is a miniature electric switch which is controlled to be switched on and off by a magnetic field, and has the structure of an iron-nickel reed packaged by a glass tube, realizes attraction conduction and loss of magnetism elastic reset by an external magnetic field, has the advantages of small volume and fast switching, but the conventional product can only bear hundreds of milliamperes of current, has obvious power limitation and can not realize high-power switch control, and the magnetic induction switch is normal when being used for controlling a single-color temperature lamp strip, but when being used as a switch of a two-line double-color temperature lamp strip, if the design is improper, the condition that the lamp strip is not turned off will appear. Therefore, it is important for those skilled in the art to design a magnetic induction switch and drawer lamp which can perform high-power switch control and is suitable for two-wire double-color-temperature lamp strip. Disclosure of Invention The embodiment of the invention provides a magnetic induction switch and a drawer lamp which can perform high-power switch control and are suitable for two-wire double-color-temperature lamp strips, so as to solve the problems that the high-power switch control is difficult to realize and the lamp strips cannot be completely powered off in the double-wire double-color-temperature lamp strip control in the prior art. The invention discloses a magnetic induction switch which is used in a two-wire double-color temperature lamp belt, wherein the two-wire double-color temperature lamp belt comprises a first input end and a second input end, and the magnetic induction switch is characterized by comprising an H-bridge control module, a first PMOS (P-channel metal oxide semiconductor) tube, a second PMOS tube, a first NMOS (N-channel metal oxide semiconductor) tube, a second NMOS tube and a magnetic spring switch; the grid electrode of the first PMOS tube is connected with the grid electrode of the second PMOS tube, the grid electrode of the first NMOS tube is connected with the grid electrode of the second NMOS tube through the magnetic reed switch, the source electrode of the first PMOS tube is connected with the drain electrode of the first NMOS tube, the connecting point of the source electrode of the second PMOS tube is used as a first voltage end, the source electrode of the second PMOS tube is connected with the drain electrode of the second NMOS tube, the connecting point of the source electrode of the second PMOS tube is used as a second voltage end, the first voltage end and the second voltage end are connected with the two-wire double-color temperature lamp strip, the drain electrode of the first PMOS tube and the source electrode of the first NMOS tube are connected with the first signal output end of the H-bridge control module, and the drain electrode of the second PMOS tube and the source electrode of the second NMOS tube are connected with the second signal output end of the H-bridge control module. Optionally, a first resistor and a second resistor connected in series are arranged between the grid electrode of the first PMOS tube and the grid electrode of the second PMOS tube, a third resistor is arranged between the grid electrode of the first NMOS tube and the magnetic reed switch, and a fourth resistor is arranged between the grid electrode of the second NMOS tube and the magnetic reed switch. Optionally, a fifth resistor is arranged between the gate of the first PMOS transistor and the source of the first PMOS transistor, a sixth resistor is arranged between the gate of the second PMOS transistor and the source of the second PMOS transistor, a seventh resistor is arranged between the gate of the first NMOS transistor and the source of the first NMOS transistor, and an eighth resistor is arranged between the gate of the second NMOS transistor and the source of the second NMOS transistor. Optionally, the resistances of the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor and the eighth resistor are the same, and are 360 Ω -400 Ω. Optionally, the first PMOS transistor and the first NMOS transistor are integrally packaged and use an NCE4503S chip. Optionally, the second PMOS transistor and the second NMOS transistor are integrally packaged and use an NCE4503S chip. Optionally, the magnetic reed switch is normally closed. Optionally, the H-bridge control module includes a controller, a third NMOS, a fourth NMOS, a fifth NMOS, and a sixth NMOS, where the gates of the third NMOS, the fourth NMOS, the fifth NMOS, and the sixth NMOS are all connected to the controller, the sources of the fourth