Mixed oscillating-type constant-voltage drive power supply for overheating protection white-light LED

Abstract

The invention discloses a mixed oscillating-type constant-voltage drive power supply for an overheating protection white-light LED. The mixed oscillating-type constant-voltage drive power supply is characterized by mainly comprising a diode rectifier U, a transformer T, a control chip U1, an amplifier P1, an input anti-jamming circuit, a resistor R3, a triode mixed oscillating circuit, a gate drive circuit and the like, wherein the input anti-jamming circuit is connected between a positive electrode output end of the diode rectifier U and a primary inductance coil L1 of the transformer T in series; the resistor R3 is connected between a negative electrode output end of the diode rectifier U and a VCC pin of the control chip U1 in series; the triode mixed oscillating circuit is connected with a GD pin of the control chip U1; and the gate drive circuit is connected between a primary inductance coil L2 of the transformer T and the triode mixed oscillating circuit in series. The temperature can be detected; the overall drive power supply can be protected when the temperature is over-high; and the damage of a high temperature to components is avoided. By the mixed oscillating-type constant-voltage drive power supply, a stable oscillation frequency can be provided, so that an LED lamp can be relatively stably driven to work.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a hybrid oscillation constant voltage driving power supply for an overheating protection type white light LED. Background technique [0002] At present, due to the characteristics of low energy consumption, long service life, safety and environmental protection, LED lamps have become one of the mainstream products for people's living lighting. With the popularity of LEDs and the continuous improvement of people's requirements for lighting effects, new challenges have been brought to LED drive power supplies. At present, the stability of the traditional LED driving power is not high, and it is easily affected by the fluctuation of the mains power, which greatly reduces the lighting effect of the LED and cannot meet people's lighting requirements. Contents of the invention [0003] The object of the present invention is to overcome the defect of low stability of the traditional LED dr...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect of low stability of the traditional LED driving power supply, and provide a hybrid oscillation constant voltage driving power supply for overheating protection white LEDs

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