MP3378GY-Z

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The MP3378GY-Z is an innovative power management integrated circuit (PMIC) which allows for the driving of multiple high brightness LEDs from one single induction current controller or buck converter. Developed by Monolithic Power Systems, the MP3378GY-Z combines the traditional PMIC components of a Buck converter with LEDs into an integrated circuit, offering multi-LED operation with minimal external components, high efficiency, and low standby power consumption. The MP3378GY-Z is an ideal solution for driving multiple high brightness LEDs in applications such as interior display branding, automotive instrument cluster and interior lighting, and exterior automotive lighting.

Features and performance

A distinguishing feature of the MP3378GY-Z is its integrated LED controller, which allow for the driving of LEDs with an adjustable frequency, current, and brightness. The device supports up to 8 LEDs and is compatible with a wide range of IGBT (insulated gate bipolar transistor) switching frequency. The MP3378GY-Z also provides over temperature and over current protection, has an operating range of 5.5V to 24V, and offers integrated EMI filtering for reducing radiated emissions. In terms of efficiency, the MP3378GY-Z is rated at up to 95%, and has a minimum operating temperature of -40 C and a maximum operating temperature of +125 C.

Application Field and Working Principle

The MP3378GY-Z is a high efficiency, multi-LED driver PMIC specifically designed for interior display branding, automotive instrument cluster and interior lighting, and exterior automotive lighting applications. The device\'s integrated buck converter allows for the conversion of the input voltage to the desired supply voltage while regulating the current draw of the LEDs to ensure proper illumination. Its IGBT switch frequency is adjustable and can be set to the range of 25 kHz to 250 kHz. The integrated LED controller allows the user to adjust the brightness and current of each LED independently, enabling the creation of more complex and striking lighting displays.

In terms of operation, the MP3378GY-Z employs a two-phase technique for switching load current. In Phase-1, when the IGBT is turned on, the input voltage passes through the capacitor and a current flows from the capacitor to the load. In Phase-2, when the IGBT is turned off, the stored energy of the input voltage recharge the output capacitor and the LED current. This two-phase switching technique allows for greater current draw from the input voltage, improving the performance of the LED driver.

Conclusion

The MP3378GY-Z provides an innovative solution to the challenge of driving multiple high intensity LEDs in applications such as automotive lighting and display branding. By integrating a buck converter and LED controller into one integrated circuit, the device offers superior efficiency and improved performance over traditional LED drivers. Its adjustable frequency, current, and brightness settings make it an ideal solution for demanding lighting applications.

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