MP24833GN-Z

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MP24833GN-Z LED Drivers

LED drivers play a major role in the current system of powering LED lighting, providing consistent and reliable power for an application that requires both efficiency and longevity within its performance. The MP24833GN-Z LED driver from Micrel is a compact integrated off-line switcher that offers an excellent lighting solution. The device is specifically designed for use in indoor commercial lighting installations and comes equipped with multiple safety protections and an efficiency of 95% - making it an ideal choice for any application where high efficiency and reliability are major considerations.

Application Field

The MP24833GN-Z is designed for operation with a voltage input range of 90 VAC to 305 VAC and features a wide operating frequency range of 47 kHz to 63 kHz. With up to 4 digital dimming options, the device is highly suitable in applications such as indoor commercial lighting, office lighting, and other illuminated environments that require high efficiency and constant light intensity. Its ultra-low EMI level makes it especially attractive to applications working in noise-sensitive environments, such as medical and communications devices.

Features

The MP24833GN-Z offers an array of features that enable it to perform ideally in a wide variety of applications. An 8-bit ON/OFF dimming interface and 5-bit PWM dimming are both supported, allowing the system to adapt to a variety of dimming requirements. Additionally, the device contains support for the Master Bit 31 dimming protocol, allowing the user to control 16 dimming levels with 31mS of settling time, ensuring a smooth transition between each dimming state.

The device also offers a dual-level latch protection: one for output over-temperature and one for output over-voltage/under-voltage conditions. This significantly reduces the chances of an output fault, which can be caused by power supply anomalies or variable loads.

The MP24833GN-Z also offers a comprehensive comprehensive range of protect features, including short circuit protection delay, thermal shutdown, and over-voltage protection. Its input under-voltage lock-out feature prevents output failure under low input voltage conditions, such as might be expected during a power cut or voltage dip. These features ensure the LED lighting system remains robust and reliable even under extreme conditions.

Working Principle

The MP24833GN-Z operates on a quasi-resonant valley-lock (QVL) principle, which is a switch mode power conversion technique that uses the inductor current to shape the current waveform. The QVL principle ensures high efficiency and low EMI, both of which are essential for optimal performance.

During operation, the device turns on via a MOSFET switch, developing an increasing magnetic field in the inductor. When the main switch turns off, the inductor current passes through a diode and charges an output capacitor. By regularly switching the inductor current, output power is maintained and regulated, thus ensuring that the LED light output is stable.

Conclusion

The MP24833GN-Z LED Driver from Micrel is a highly efficient and reliable device specifically designed for indoor commercial lighting applications. It offers comprehensive protection features, as well as an array of dimming protocols to suit a variety of dimming requirements. Its QVL principle ensures high efficiency and low EMI, making it an ideal choice for any application requiring high performance and stability.

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