MP1518DG-LF-Z

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MP1518DG-LF-Z is a current-mode constant-current chip specifically designed to drive LEDs. It provides one integrated PWM dimming solution with wide input voltage. It supports up to 20V input and up to 500mA output current, which is suitable for a wide range of LED lighting applications. It is a fully integrated solution with a host processor, analog input, and a PWM dimming circuit and has the advantages of low power dissipation and high cost performance.

Due to its features, MP1518DG-LF-Z is widely applied into many LED lighting applications, including high and low power LED lighting like autodimming headlights, emergency lighting, and indirect lighting. With its wide range of input voltage (DC12V-20V) and adjustable LED current (8mA to 500mA), it can also be used in LED TV and monitor displays, LED strip lights, LED lightning, LED decorative lighting, LED street and road lighting, LED billboard lighting, LED signage lighting etc.

The working principle of the MP1518DG-LF-Z is based on a current-mode regulation technique. The integrated circuit uses a constant current source and a reference current to control the output current to the LEDs. The input voltage to the LEDs is determined by the setting of the reference current and the current source. When the detected LED current is higher than the reference current, the current source will reduce the LED current and vice versa. In this way, the output LED current can be kept constant regardless of the driving conditions or changes of the resistor. It is a closed-loop control system that ensures that the LED current remains within the desired range.

The MP1518DG-LF-Z also integrates a dimming circuit which allows for PWM dimming control. The PWM dimming can be achieved by controlling the duty cycle of the PWM signal. When the duty cycle of the signal is increased, the average current to the LEDs will also be increased and vice versa. The PWM dimming circuit is used to control the brightness of the LEDs in a more accurate and efficient way.

In summary, MP1518DG-LF-Z is a highly integrated current-mode constant-current chip which is specifically designed to drive LEDs. It is suitable for a wide range of LED lighting applications and offers the advantages of low power dissipation, wide input voltage and adjustable LED current. It can be used in many types of LED lighting applications, such as lighting and display devices, for both high and low power applications. Its features, such as PWM dimming and current-mode regulation, make it ideal for a wide range of LED lighting applications.

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