Soft-start type LED lamp string controller

Abstract

The invention relates to a soft start serial controller, wherein it uses the time pulse generator of central processor to set pulse generating time, to make output of pulse control chip to output delay pulse with some width to the base electrode of crystal triode in the driving and instructing circuit, and make the collecting electrode of crystal triode output one serial of trigger pulses whose phase angles are increased, to start the bidirectional controllable silicon, and uses pulse control chip to adjust the trigger pulse phase angle in stable state of crystal triode, to control the connectangle of controllable silicon in normal operation, adjusts output voltage; increase the current and voltage of output line, without burst, to prolong the service life of LED lamp. The invention can avoid over-current and over-voltage protective circuit, to simplify the structure, and reduce cost.

Description

Technical field [0001] The invention belongs to the field of electronic technology production in the lamp industry, and in particular relates to a soft-start LED lamp string controller suitable for LED decorative lamps. Background technique [0002] At present, light strings, especially LED decorative light strings, festival light strings, Christmas light strings, etc., all require a safe low-voltage constant DC voltage for power supply. However, there are obvious peak and trough periods in electricity consumption in major and medium-sized cities in my country, and the voltage changes in the peak and trough periods of electricity consumption in urban areas are more obvious. Decrease, close to the valley period, at this time the current in the power supply line is relatively small, the line loss decreases, and the voltage increases accordingly. At this time, for the LED light string circuit that requires low-voltage constant DC voltage power supply, there will generally be a ...

AI Technical Summary

Problems solved by technology

At this time, for the LED light string circuit that requires low-voltage constant DC voltage power supply, there will generally be a large voltage between the lines. When the light string is lit, the sudden excessive current or high voltage will cause the circuit to burn out. , or directly cause damage to the LED light string

[0003] For example, the patent number is 03255586.5, and the name is "Multifunctional Controller for Light String Power Supply". This patented technology adopts a protection circuit. However, due to the additional overload protection and short-circuit protection in the output circuit, and each light string circuit needs to be provided with a switch control tube to control the circuit, the circuit structure is complicated and the components used are numerous, resulting in an increase in overall cost.

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