Low-power-consumption constant-current starting LED driving power supply

Abstract

The invention discloses a low-power-consumption constant-current starting LED driving power supply. The driving power supply comprises a direct-current power supply module, a flyback power supply module, a control module, a constant-current starting module, an auxiliary power supply module, a switch switching module and a dimming module. The direct-current power supply module is used for converting alternating-current input into direct-current bus voltage; the power supply input end and the power supply output end of the flyback power supply module are respectively connected with a direct current bus voltage and an LED; the power supply end of the control module is used for receiving starting voltage, the signal receiving end is used for receiving external signals, and the signal output end is connected with the driving end of the flyback power supply module and controls the on-off of the flyback power supply module; the power input end of the constant-current starting module is connected with direct-current bus voltage, and the power output end is connected with the power end of the control module; and the switch switching module is used for pulling down the voltage of the first control end to turn off the constant current starting module when the flyback power supply module is started, so that low power consumption and quick starting are realized.

Description

technical field [0001] The invention relates to the technical field of LED power supplies, in particular to a low-power constant-current start-up LED drive power supply. Background technique [0002] With the improvement of people's living standards, people's requirements for quality of life are getting higher and higher. In the field of lighting, LED lights are widely used due to their energy-saving, durable and other characteristics. [0003] However, most of the current LED drive power supplies power to the control module by connecting several resistors with large resistance to the DC bus voltage and then connecting to the power supply terminal of the control module when starting up. However, when the DC bus voltage is full voltage When inputting, the start-up speed of the LED drive power supply will be affected; when the input voltage is large, the input current is large, the start-up speed is fast, and when the input voltage is small, the input current is small, the sta...

AI Technical Summary

Problems solved by technology

[0003] However, most of the current LED drive power supplies power to the control module by connecting several resistors with large resistance to the DC bus voltage and then connecting to the power supply terminal of the control module when starting up. However, when the DC bus voltage is full voltage When inputting, the start-up speed of the LED drive power supply will be affected; when the input voltage is large, the input current is large, the start-up speed is fast, and when the input voltage is small, the input current is small, the start-up speed is slow; The resistance value of the resistor can increase the startup speed, but when the resistance value of the resistor decreases, the power consumption on the resistor will increase, which will have an impact on the standby power consumption

[0004] In summary, the LED drive power supply in the prior art still needs to be further improved

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