MAX16801AEUA+

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The MAX16801AEUA+ is an LED driver from Maxim Integrated’s Power Management Integrated Circuits (PMIC) product line. It is a linear constant-current LED driver for automotive applications. It is designed to support multiple LED strings in any number of configurations, with each string having a wide range of current available.

The MAX16801AEUA+ is intended to be used in automotive headlights, tail lights, and brake lights, as well as emergency lighting, home and automotive safety lighting, and decorative lighting. It is a DC/DC controller that can deliver up to 2A of current to each of four series-connected strings of up to 10 LEDs. It offers both constant-current and hiccup over-current protection, with a switchable frequency of up to 50kHz for fast dimming and wide LEDs compatibility. Moreover, it supports a wide input voltage range of 6–18V, allowing for a variety of automotive applications. Its low quiescent current allows for low system power draw, and its voltage drop is lower than most alternatives, enabling drivers to have higher efficiency than competitors.

The Maxim Integrated LED driver features programmable LED dimming, up to 16 bits of LED dimming resolution, and an average LED current accuracy of ±1%. The LED driver offers a very low external component count, with a wide-input range, PWM dimming, and a wide LED forward voltage range, allowing for its use in multiple applications. Additionally, its low-profile 1.00mm 20-pin TQFN package is ideal for space constrained applications.

The MAX16801AEUA+’s working principle is based on a buck converter that switches a signal at a constant frequency. A Step-down regulator circuit is connected to the LED driver and the LED load. As the load changes, the LED driver adjusts the frequency of the signal driving the buck converter to maintain a constant current. This allows for an accurate current delivery over the life of the LED, with minimal distortion from changes in the input or load. The voltage is feedback from the output side, allowing for precision current control.

The constant current and hiccup over-current protection offered by the MAX16801AEUA+ make it well-suited for use in dimmable automotive lighting. Its wide input voltage range, customizable frequency, and low component count mean that it can be used in a variety of applications, such as emergency lighting and home and automotive safety lighting. In addition, its small profile makes it easily integrated into tight spaces. Overall, the MAX16801AEUA+ is an ideal choice for dimmable car lighting and other applications requiring precise LED current control.

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