Driving protection circuit and lamp
A technology for driving protection circuits and driving circuits, which is applied in emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., can solve problems such as damage to driving circuits, and achieve the effect of prolonging life
Inactive Publication Date: 2014-05-07
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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- Abstract
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- Application Information
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Problems solved by technology
[0004] The main purpose of the present invention is to provide a driving protection circuit, which aims to solve the problem that the current driving protection circuit adopts cyclic protection for the driving circuit, which easily leads to damage to the driving circuit
Method used
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[0011] In order to make the purpose, principle and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0012] figure 1 The schematic structure of the driving protection circuit provided by the embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows.
[0013] The drive protection circuit 100 is connected in series between the voltage detection circuit 200 and the drive circuit 300 of the lamp, and the drive protection circuit 100 includes:
[0014] Resistor R1, resistor R2, transistor Q1 and transistor Q2, the voltage detection circuit 200 is connected to the transistor Q1, t...
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The invention is applicable to the field of lamps and provides a driving protection circuit and a lamp. The driving protection circuit is connected in series between a voltage detection circuit and a driving circuit of the lamp and comprises a resistor R1, a resistor R2, a transistor Q1 and a transistor Q2, wherein the voltage detection circuit is connected with the transistor Q1; the transistor Q1 is connected with the transistor Q2; the transistor Q2 is connected with the start control end of the driving circuit; the voltage detection circuit outputs a trigger voltage; the trigger voltage triggers the transistor Q1 to be switched on; the transistor Q1 is switched on to switch on the transistor Q2; and the transistor Q2 is switched on to make the voltage of the start control end of the driving circuit lower than a start voltage standard value, and the driving circuit stops working, so that the driving protection circuit cannot stay in a cycle of start-stop-start-...... and cannot be damaged, and the service life of the lamp is prolonged.
Description
technical field [0001] The invention belongs to the technical field of electronic circuits, and in particular relates to a drive protection circuit and a lamp using the circuit. Background technique [0002] In the existing lamp circuit, it includes a drive circuit for driving the light-emitting element and a drive protection circuit. When the drive protection circuit detects that the operating voltage is unstable, the drive protection circuit works, the drive circuit stops working, and the light-emitting element goes out. When the protection circuit detects that the feedback signal is normal, the drive circuit resumes working, and the light-emitting element lights up normally again. [0003] When the driving protection circuit continuously detects the voltage of the driving circuit through the voltage detection circuit, once it detects that the operating voltage of the driving circuit is unstable, the driving protection circuit will immediately play a protective role, but i...
Claims
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IPC IPC(8): H05B37/02H02H3/00
Inventor 周明杰张建锋
Owner OCEANS KING LIGHTING SCI&TECH CO LTD