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Low-cost omnidirectional fully-compatible driving device

A compatible drive, all-round technology, applied in lighting devices, electric lamp circuit layout, light source and other directions, can solve the problems of complex compatible lines, high cost, large size, etc.

Active Publication Date: 2015-04-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There is no published fully compatible fluorescent lamp drive scheme in the world, only a certain type of ET (electronic transformer) or IT (inductive transformer) is known, that’s all. Known compatible circuits are very complex, costly, and very large in size

Method used

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  • Low-cost omnidirectional fully-compatible driving device

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Embodiment 1

[0013] see figure 1 , this low-cost all-round fully compatible drive device, including intelligent control unit, current limiting constant current unit, high frequency constant current control IC, voltage monitoring unit, LED light string, resistor R, diode D1, diode D2, diode D3, diode D4, Diode D5, diode D6, diode D7, diode D8, diode D9, inductor L, capacitor C, switch K101, switch K102, switch K103, first input contact A, second input contact B, third input contact C and the fourth input contact D; the switch K101, the LED light string, the inductor L, the switch K103 and the resistor R are sequentially connected in series with the diode D9; the anode of the diode D1 is electrically connected to the first input point A, and the cathode is electrically connected to the switch K101; The anode of the diode D2 is electrically connected to the second input point B, and the cathode is electrically connected to the switch K101; the cathode of the diode D3 is electrically connected...

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Abstract

The invention discloses a low-cost omnidirectional fully-compatible driving device. A voltage monitoring unit is used for detecting the upper-end voltage of a switch K103 and transmitting the detected voltage to a high-frequency constant-current control IC (Integrated Circuit); the high-frequency constant-current control IC is used for judging whether to make the K103 enter high-frequency BUCK PWM (Pulse-Width Modulation) or enter a current-limiting running mode according to a voltage value output by the voltage monitoring unit and the detected current value of the switch K103; a current-limiting constant-current unit is used for the peak current of a monitoring resistor R to flow through, and is used for entering a current-limiting constant-current mode through the switch K103; and an intelligent control unit is used for realizing time sequence control of K101 through a delta time delay method by means of current on the voltage monitoring unit and the resistor R and a signal provided by the current-limiting constant-current unit. The low-cost omnidirectional fully-compatible driving device can be compatible under the situation of not damaging a lamp tube or a ballast, and four types of compatibility, namely, inductive compatibility, coupling electronic compatibility, ordinary electronic compatibility and preheating electronic compatibility, and full compatibility with direct input of mains supply are realized.

Description

technical field [0001] The invention relates to an LED driving device in the field of LED fluorescent lamps, in particular to a low-cost, omnidirectional and fully compatible driving device. Background technique [0002] There is no published fully compatible fluorescent lamp drive solution in the world, and only a certain type of ET (electronic transformer) or IT (inductive transformer) is known to be compatible, and the known compatible circuits are very complicated, high in cost, and very large in size. Contents of the invention [0003] The technical problem to be solved by the present invention is to aim at the deficiencies of the above-mentioned prior art, and to provide a kind of inductive type, coupled electronic type, ordinary electronic type, preheating Compatible with four types such as electronic type and fully compatible drive device for direct input of mains power. [0004] In order to solve the above-mentioned technical problems, the technical solution adop...

Claims

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Application Information

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IPC IPC(8): H05B37/02
CPCH05B47/10Y02B20/40
Inventor 陈敦军雷建明张荣郑有炓
Owner NANJING UNIV