MP5414DV-LF-P

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The PMIC (Power management IC) MP5414DV-LF-P is designed for LED backlighting in various displays such as LCDs and OLEDs. It is a highly integrated single-channel power-management IC that provides the needed power to drive mono LED strings or chains. In its basic configuration, the MP5414DV-LF-P offers a power switch, an inductor, a number of capacitors, and a bridge rectifier in a 3x3mm PQFN package.

The MP5414DV-LF-P integrates a 200mA linear regulator and up to six external MOSFETs to adapt to different LED backlight scenarios. It has an input voltage range of 5V to 28V and an adjustable LED string current up to 25mA. It also features an independent dimming control with up to 256 current steps and an operating temperature range of -40°C to 125°C.

The working principle of MP5414DV-LF-P consists of three blocks, namely Switch Mode Power Supply (SMPS), Load Switch, and Output regulator. Firstly, the internal SMPS block takes the input voltage and with the help of the inductor and capacitor, it generates a regulated voltage output, which is referred to as the Boost voltage. Secondly, the Load Switch takes this regulated Boost voltage further and switches it across the LED string to be able to provide the desired current to the LEDs. Lastly, the output regulator takes the signal from Load Switch and adjusts it to the output voltage corresponding to the dimming signal from the controller.

The switching frequency of the MP5414DV-LF-P is an adjustable two-level type, starting with a slow-mode switching frequency of 120KHz. If a pulse-width-modulated (PWM) signal is detected, the operating frequency is automatically increased to 1.1MHz. This adjustable switching frequency and the low operating temperature range of the MP5414DV-LF-P not only reduce noise, but also improve the performance of the system.

MP5414DV-LF-P has several advantages. It is designed to meet the light quality requirements of white LED backlighting and eliminates the need for a separate boost or buck/boost voltage regulator, resolves design complexity and reduces cost. Secondly, it also features a small form factor and advanced features such as high efficiency and adjustable LED string current up to 25mA, which makes it well-suited for LED backlighting applications. Lastly, its wide input voltage range, high accuracy and fast response time make it a reliable choice for LED applications in various sectors.

In conclusion, MP5414DV-LF-P is a highly integrated power management IC for LED backlighting applications. Its wide input voltage range, adjustable LED string current up to 25mA, two-level switching type, low operating temperature range and advanced features provide greater control and flexibility over the system at a reduced cost. It is an ideal choice for a variety of lighting applications, including industry, mobile devices, automotive, aerospace, and medical.

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