MAX16841ASA+T

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LEDs, or light-emitting diodes, have become ubiquitous in modern life. They are found in an ever-increasing number of products due to their reliability, high efficiency, and long lifespans. In order to take advantage of the many advantages of LED lighting, LED drivers are needed to regulate and adjust the LED current to guarantee optimal performance. In this article, we will learn about the MAX16841ASA+T and the application field and working principle of this LED driver.

What is the MAX16841ASA+T?

The MAX16841ASA+T is a PMIC – LED Drivers that has been specifically designed to power high-brightness LEDs. It provides an adjustable constant-current source above 6.5V, perfect for powering the most common types of LEDs. It features a wide 2-96V operation range, up to 16.3V in steady-state, and can control up to 4 LEDs or string of LEDs in parallel. The MAX16841ASA+T also has an integrated thermally protected 200mA and 100mA low side switches for use in series and parallel LED configurations for up to 24V Vf.

What are the application fields of MAX16841ASA+T?

The MAX16841ASA+T can be used in a variety of application fields, including automotive, transport, medical, industrial and consumer lighting. Automotive lighting, for example, requires a reliable and efficient LED driver that can maintain a constant current output, even in extreme temperatures. The MAX16841ASA+T is the perfect solution for these requirements, providing a stable current output even in temperatures ranging from -40°C to 85°C.

In addition, the MAX16841ASA+T is also suitable for industrial and commercial lighting applications that require higher output current, as it can handle up to 16.3V. In high-end lighting projects, it can be used to power multiple LED strings in parallel, thus reducing the need for multiple LED drivers.

Working principle of MAX16841ASA+T

The built-in voltage regulator of the MAX16841ASA+T allows it to provide an adjustable constant current output above 6.5V. This eliminates the need for complex current-sense circuitry when driving high-brightness LEDs. In addition, the MAX16841ASA+T uses a unique current-limited topology to ensure that each LED receives a consistent current regardless of the number of LED strings connected in parallel. This helps to maximize LED life and uniformity in the different LED strings.

In terms of the operating modes, the MAX16841ASA+T offers different settings for brightness control, including analog (resistor-programmable), PWM and I2C dimming. The driver can also be synchronized to an external clock source to minimize EMI radiation in sensitive applications. The integrated 200mA and 100mA low-side switches can provide additional current to the LEDs, as needed, to improve efficiency. The MAX16841ASA+T also features a built-in thermal shutdown circuit to help protect the driver and LEDs from damage due to overload.

Conclusion

The MAX16841ASA+T is a versatile, comprehensive PMIC – LED Drivers specifically designed to make the integration of high-brightness LEDs easier and more cost-effective. It allows high-efficiency operation from a wide 2-96V input range, with adjustable constant current up to 16.3V. In addition, it offers multiple options for brightness control, and integrated low-side switches for additional current if needed in certain applications. Finally, it is protected by a built-in thermal shutdown circuit and is suitable for use in a variety of lighting applications, from automotive to medical.

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