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One-button switch control circuit and led lamps

A technology of switch control circuit and LED light source, which is applied in the layout of electric lamp circuit, electric light source, lighting device, etc., can solve the problems of switch shrapnel ignition, switch contact oxidation, and switch function failure, etc.

Inactive Publication Date: 2015-10-28
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, many electronic products use mechanical switches to directly switch the power supply. Since the mechanical switch will generate a large instantaneous current when it is turned on, the contacts of the switch shrapnel are prone to sparking, which can easily oxidize the switch contacts and cause the switch Poor contact may cause the switch function to fail

Method used

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  • One-button switch control circuit and led lamps

Examples

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Embodiment Construction

[0020] like figure 1 As shown, the single-key switch control circuit of this embodiment is used to control the LED light source to emit light, including a power supply BT1, a switch S1, a capacitor C1, a P-channel MOS transistor Q1, a switch transistor 200, a first voltage dividing resistor R1, a second The voltage dividing resistor R2, the third voltage dividing resistor R3, the current limiting resistor R4 and the LED light source 100; the source of the MOS transistor Q1 is connected to the positive pole of the power supply BT1, the drain of the MOS transistor Q1 is connected to the positive pole of the LED light source 100, and the LED light source 100 Both the negative pole and the negative pole of the power supply BT1 are grounded; the first voltage dividing resistor R1 is connected between the positive pole of the power supply BT1 and the gate of the MOS transistor Q1, and the second divider resistor R1 is connected in series between the control terminal of the switch tub...

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PUM

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Abstract

A single-key switch control circuit is used for controlling an LED light source to illuminate and comprises a power source, a switch, a capacitor C1, a P-channel MOS (metal oxide semiconductor) tube Q1, a switch tube Q2, a first divider resistor R1 and a second divider resistor R2. The source electrode of the MOS tube Q1 is connected with the positive electrode of the power source, the drain electrode of the MOS tube Q1 is connected with the positive electrode of the LED light source, and the negative electrode of the LED light source and the negative electrode of the power source are both grounded. The first divider resistor R1 is connected between the positive electrode of the power source and the grid electrode of the MOS tube Q1, the control end of the switch tube is connected with the drain electrode of the MOS tube Q1 through the second divider resistor R2, the output end of the switch tube is grounded, the input end of the switch tube is respectively connected with the grid electrode of the MOS tube Q1 and the switch S1, the other end of the switch S1 is connected with the drain electrode of the MOS tube Q1, and the control end of the switch tube is grounded though the capacitor C1. According to the single-key switch control circuit, small currents or no currents can flow through the switch S1, so that large instantaneous currents can be avoided.

Description

【Technical field】 [0001] The invention relates to a protection circuit, in particular to a single-key switch control circuit. 【Background technique】 [0002] At present, many electronic products use mechanical switches to directly switch the power supply. Since the mechanical switch will generate a large instantaneous current when it is turned on, the contacts of the switch shrapnel are prone to sparking, which can easily oxidize the switch contacts and cause the switch Poor contact may cause the switch function to fail. 【Content of invention】 [0003] Based on this, it is necessary to provide a simple and reliable one-key switch control circuit that is not easy to spark. [0004] A single-key switch control circuit, including a power supply, a switch, a capacitor C1, a P-channel MOS transistor Q1, a switch tube, a first voltage dividing resistor R1, and a second voltage dividing resistor R2; [0005] The source of the MOS transistor Q1 is connected to the positive pole ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 周明杰管伟芳
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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