At present, the LED fluorescent lamp market is very active, and the manufacturers are mainly divided into three categories: one is the factory that originally made the LED chip , and the downstream is infiltrated into the downstream, and there is not much knowledge about the circuit knowledge and the LED fluorescent lamp power supply; the second type is the original ordinary lighting. The factory enters a new field and knows a little about the circuit; the third is a new factory, which knows a little about the LED power supply. LED fluorescent lamp power is the most important component of LED fluorescent lamp. If it is not properly selected, LED fluorescent lamp can not only perform its performance, or even use it normally. LED fluorescent lamp power supply and lamp board matching Some customers first design the light board, then find the power supply, and find that it is difficult to have a suitable power supply, or the current is too large, the voltage is too small (such as I>350mA, V<40V); or the current is too small, the voltage is too high (such as I< 40mA, V>180V), the result is severe heat, low efficiency, or insufficient input voltage range. In fact, choose the best string parallel connection method, the voltage and current applied to each LED are the same, and the power supply effect can achieve the best performance. Therefore, the best way is to communicate with the power supply manufacturer first. Tailored. LED operating current General LEDs have a rated operating current of 20 mA, and some plants use the largest at the beginning, with a design of 20 mA. In fact, the working heat at this current is very serious. After many comparison tests, it is ideal to design 17 mA. LED operating voltage The recommended operating voltage for general LEDs is 3.0-3.5V. After testing, most of the work is at 3.125V, so it is reasonable to calculate according to 3.125V. LED lamp board series and parallel with wide voltage In order for the LED fluorescent lamp to operate over a wide range of input voltages (AC85-265V), the LED string parallel connection of the panel is important. Since the current power supply is generally a non-isolated buck power supply, when a wide voltage is required, the output voltage should not exceed 72V, and the input voltage range can reach 85-265V, that is, the series number does not exceed 23 strings, and the number of parallel connections Do not be too much, otherwise the working current is too large and the heat is severe. It is recommended to be 6 and 8, 8 and 12, and the total current is not more than 240 mA. The KSPOWER brand KR plug fixed adapters is one black or white color constant voltage mode, accepts universal input 100-240V 50/60Hz AC voltage and provides the complete international plug adaptor solutions covering the dc output voltage ranging from 5volt to 36volt, the output wattages ranging from 5 watts to 60 watts and the output current ranging from 100ma to 6000ma single output wall plug adapter. The wall ac adapter follows high quality level VI energy efficiency and meet IEC/EN/UL 60950-1 and 61558 safety standards, with KC KCC CE RoHS safety certificates. The adaptor 220v to 12v 24v is Class II power designed with the standard KR AC plug export for south korea market and offers three years after-sale customer service. The kc dc adapter accepts various dc connector sizes optional for various LED, audio/video and I.T.E applications and protections for short circuit, over load, over voltage and over temperature. OEM ODM LOGO Case Color Cord Connector PCBA customization is available. international plug adaptor,wall plug adapter,wall ac adapter,adaptor 220v to 12v,dc adapter Shenzhenshi Zhenhuan Electronic Co., Ltd , https://www.szzhpower.com