MP2489DN-LF-Z

The MP2489DN-LF-Z is a Pulse Width Modulation (PWM) LED driver that has been optimized for use in a wide range of applications, such as LED bulbs, Light-Emitting Diode (LED) street lamps or LED signs. This device is a synchronous buck mode Constant Current driver that exhibits low LED dimming flicker and is equipped with an internal soft-start feature. The MP2489DN-LF-Z is designed to achieve high efficiency without compromising on noise and EMI levels, making it suitable for automotive, industrial and consumer applications. This LED driver also incorporates an internal feedback circuitry for constant current output, enabling a simple and cost-effective way to control an LED system and maintain desired brightness levels. This article will explore the application field and working principle of the MP2489DN-LF-Z.

Application Field

The MP2489DN-LF-Z is commonly used in many lighting or display applications, including automotive interior and exterior lighting, commercial or residential lighting, decorative lighting fixtures, and signboard displays. The device is also capable of driving high-current LEDs, making it suitable for other types of lighting, such as spotlights or flood lights. Additionally, the device is built with a high efficiency, which is valuable when working with high output LEDs or applications that require long battery life.

Another application field for the MP2489DN-LF-Z is in industrial automation. This device allows for smooth dimming and control of motors, pumps, and other process controllers, enabling manufacturers to adjust speed, torque and other functions for specific tasks. This type of motor control provides consistent and automated operation, simplifying production processes and reducing the potential for operator error.

Working Principle

The MP2489DN-LF-Z uses the Pulse Width Modulation (PWM) control scheme to regulate LED current and brightness. This technique enables the device to be driven off a low-voltage power supply, such as a typical 4.5V – 24 V power source, while delivering LED current levels of up to 1.2A. This control scheme also provides fast response times and dynamic range control, allowing the user to quickly adjust the LED brightness levels via the dimming pin.

The MP2489DN-LF-Z has a built-in feedback circuit which ensures that the LED current is maintained at a constant level, regardless of supply voltage or LED thermal variations. This feedback circuit is composed of three main components; a current sense resistor, an error amplifier, and a power gate. The current sense resistor creates a reference voltage based on the current passing through it, which is then compared with an internal reference voltage by the error amplifier. The power gate, if needed, will then increase or decrease the drive current accordingly, thus keeping the actual current within the predetermined limit.

The MP2489DN-LF-Z is also equipped with an internal soft-start feature. This helps reduce inrush current, minimizing power supply noise, and ensuring that the LED dimming operations are smooth and flicker-free. These features make the MP2489DN-LF-Z an ideal solution for LED lighting applications and industrial motor control.

Conclusion

The MP2489DN-LF-Z is a compact and efficient Pulse Width Modulation LED driver optimized for LED lighting and industrial motor control applications. It is capable of providing constant current LED output, as well as smooth LED dimming, thanks to its built-in feedback circuit and soft-start feature. With a wide operating supply voltage range, high efficiency, and low EMI levels, the MP2489DN-LF-Z is clearly an excellent choice for automotive, industrial and consumer applications.