MP46885DN-LF-Z

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MP46885DN-LF-Z is a frequency-mode buck-boost converter designed for LED lighting applications. It integrates an 800mA Internal FET, thus providing higher efficiency and better thermal characteristics. With the help of an integrated PWM-dimming controller, MP46885DN-LF-Z provides a perfect LED current regulation accuracy and ripple. In addition, a Vr or Hz mode can be independently enabled, so that the power supply output voltage and current can be automatically adjusted depending on system requirements. It is also an ideal choice for applications requiring an ultra-small, cost-effective, and high-performance solution.

Applications of MP46885DN-LF-Z

MP46885DN-LF-Z is suitable for applications such as LED lighting products, LED dimming lighting products, and LED display backlighting products. It can efficiently drive single-string LED lighting products over a wide output current range of 0.05A to 4A.

Working Principle of MP46885DN-LF-Z

The working principle of the MP46885DN-LF-Z is based on a buck-boost type switching regulator. It is a DC-DC converter designed to step-up or step-down an input voltage in order to meet the output voltage level. The operation of this device can be divided into three stages - boost, buck-boost, and buck. In boost mode, the device steps up an input voltage lower than the output voltage in order to reach the required level. During the buck-boost mode, the device regulates the input voltage and steps it up or down as needed. Finally, the last stage is buck mode, where the same input voltage is stepped down to lower the output voltage.

MP46885DN-LF-Z also integrates a PWM dimming controller for LED current regulation. This controller allows the user to adjust the output current of the device without the need of R and L components. The accuracy of the current regulation is up to ±3%, providing a more stable and efficient output. The controller also monitors the temperature of the LEDs and adjusts the output current accordingly to extend the life of the LED array.

Conclusion

MP46885DN-LF-Z is a highly reliable and cost-effective frequency-mode buck-boost converter. It offers an integrated 800 mA Internal FET for higher efficiency and better thermal characteristics. In addition, its integrated PWM dimming controller allows for precise LED current regulation and extends the life of the LED array. This makes it an ideal solution for LED lighting products, LED dimming lighting products, and LED display backlighting products.

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