MP3309AGQ-Z

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PMIC - LED Drivers are mainly used for illumination and lighting applications ranging from remote-control and automotive lighting applications to small indoor signs and outdoor displays. The MP3309AGQ-Z is a high-voltage synchronous buck LED driver integrating a power switch, an inductor and current-setting resistor, and feedback components. With its features and working principle, the MP3309AGQ-Z is suitable for driving LEDs in indoor and outdoor applications.

The MP3309AGQ-Z is a current-mode-controlled synchronous buck LED driver, featured with an adjustable switching frequency up to 1MHz, a transmission ratio range of 0.2 to 0.85, and an ultra-wide voltage range of 6V up to 40V. It utilizes a good dynamic response to minimize the effect of load transient, and a low 3.2mΩResistance Power switch with proprietary dithering is designed to minimize the output voltage ripple effectively. The MP3309AGQ-Z is also equipped with protection functions, such as circuit slow-start protection, short-circuit protection and over-current protection, making it convenient and reliable for LED lighting applications.

The MP3309AGQ-Z works in a unique way. The reference input voltage is compared with the power switch voltage and a signal is sent to the power switch control. When the voltage difference is less than the reference voltage, the control signal will close the power switch to turn off the LED Driver circuit. The inductor and the power switch are used to filter the switching signal, creating a smooth current waveform in order to limit the current that is being sent to the LED.

The most common application for the MP3309AGQ-Z is in LED lighting systems, such as automotive lighting and indictors, indoor and outdoor signs, and building lighting systems. It is also suitable for driving LEDs along with providing the necessary protection for them. The MP3309AGQ-Z has low cost, efficiency and excellent operating temperature range, making it very attractive to design engineers.

In summary, the MP3309AGQ-Z is a high-voltage synchronous buck LED driver able to operate under high-voltage and ultra-wide voltage ranges. It utilizes a current-mode-controlled synchronous buck LED driver capability and a transmission ratio range of 0.2 to 0.85. It has excellent features such as a low resistance power switch, over-current protection, and excellent operating temperature range, making it suitable for driving LEDs in indoor and outdoor applications.

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