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Non-isolated switching power supply for high-voltage light strip

Inactive Publication Date: 2017-01-25
GUANGDONG OML TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the power supply used in the existing high-voltage light strips is an isolated switching power supply. The price of the isolated switching power supply is relatively high, which accounts for a large part of the cost of using the light strip. How to further reduce the cost of using the light strip and make manufacturers stand out from market competition? Standing out, reducing the cost of high-voltage power supplies is the key

Method used

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  • Non-isolated switching power supply for high-voltage light strip
  • Non-isolated switching power supply for high-voltage light strip
  • Non-isolated switching power supply for high-voltage light strip

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Embodiment Construction

[0021] like figure 1 As shown, it is a non-isolated switching power supply for high-voltage light strips of the present invention, including a full-bridge rectifier circuit 10, a switching tube Q2, an electrolytic capacitor C2, an energy storage inductor L1, a diode D4, a PWM circuit 90, and a full-bridge A filter capacitor C1 between the two output terminals of the rectification circuit 10 . In this embodiment, the switch tube Q2 adopts a field effect tube, but it is not limited to this field effect tube, and other conventional known replaceable switch tubes are also applicable to the present invention.

[0022] The connection relationship of the above circuit is: the PWM signal output terminal of the PWM circuit 90 is connected to the control pole of the switch tube Q2, the switch tube Q2 and the diode D4 are connected in series between the two output terminals of the full-bridge rectifier circuit 10, and the cathode of the diode D4 It is connected to the positive output t...

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Abstract

The invention discloses a non-isolated switching power supply for a high-voltage light strip. The power supply comprises a full-bridge rectifier circuit, a switching tube Q2, an electrolytic capacitor C2, an energy-storage inductor L1, a diode D4 and a PWM (pulse-width modulation) circuit, wherein a PWM signal output end of the PWM circuit is connected with a control electrode of the switching tube Q2, the switching tube Q2 and the diode D4 are connected in series between two output ends of the full-bridge rectifier circuit, a negative electrode of the diode D4 is connected with a positive output end +VCC of the full-bridge rectifier circuit, and the energy-storage inductor L1 is connected between a negative electrode of the electrolytic capacitor C2 and a positive electrode of the diode D4. The non-isolated switching power supply adopts a brand new circuit structure, the voltage of the energy-storage inductor L1 is modulated according to the pulse width of the PWM circuit to be maintained at 130 V, so that the electrolytic capacitor C2 can output the high voltage of 180 V constantly, the power supply is low in cost, and a high-voltage strip manufacturer using the power supply has more competitiveness than other high-voltage strip manufacturers.

Description

technical field [0001] The invention relates to a switching power supply, in particular to a non-isolated switching power supply for high-voltage lamp strips. Background technique [0002] The installation of high-voltage LED light strips is relatively simple. It can be directly driven by a high-voltage driver. Generally, it can be configured directly in the factory, and it can work normally when connected to a 220V power supply. Because the high-voltage LED light strip is equipped with a high-voltage power supply, generally one power supply can With 30 to 50 meters of LED light strips, and relatively speaking, the cost of high-voltage voltage is relatively low. At present, the power supply used in the existing high-voltage light strips is an isolated switching power supply. The price of the isolated switching power supply is relatively high, which accounts for a large part of the cost of using the light strip. How to further reduce the cost of using the light strip and make...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/44H02M1/12H05B33/08H05B44/00H05B45/50
CPCH02M1/126H02M1/44H02M3/33523H05B44/00H05B45/50H05B45/375Y02B20/30
Inventor 张培良
Owner GUANGDONG OML TECH CO LTD