MAX16838AUP+ Integrated Circuits (ICs)

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MAX16838AUP+ is an LED driver developed by Maxim Integrated. It is used to drive multiple LED strings at up to 30V with constant-current accuracy. It accepts a wide input voltage range while drawing very low quiescent current. The device includes a ten-bit PWM input, enabling it to dim LED strings without affecting the angle of the dimming curve. TheMAX16838AUP+ can be used in a variety of applications such as automotive lighting, architectural lighting, LED billboards, backlighting, LED signage, and LED console and house lighting.

The MAX16838AUP+ features a buck topology with a programmable over-voltage protection (OVP) that protects the LED strings against open and short circuit conditions. The device supports up to 6 regulated current sinks and 3 regulated current sources. The device also integrates a programmable temperature monitor and automatically adjusts the output current to maintain constant current accuracy and extended LED string life. It also features a two-level active quiescent current distribution from the power supply. This helps to reduce the power supply noise.

The MAX16838AUP+ uses a proprietary boost converter design with a novel current-feedback circuit to provide accurate and reliable current regulation. The device operates on a single synchronous buck architecture with a selectable variety of current ranges which are externally adjustable. This allows for easy adaptation between different types of LED strings without compromising output accuracy. It also has a PWM dimming capability, allowing for dimming of the LEDs without any dimming curve shift.

The working principle of the MAX16838AUP+ is based on the transistor architecture of the device. The boost converter triggers a transistor which allows the inductor coil to store energy as current during the on-time of the boost converter’s operation. The transistor then switches off, releasing the stored energy to the LED string, thereby providing the LED string with current. The current is regulated by the MAX16838AUP+ circuit which adjusts the on-time of the boost converter to regulate the output current.

In summary, the MAX16838AUP+ is a highly integrated LED driver which is designed for driving multiple LED strings with a wide input voltage range and high accuracy current regulation. It offers an excellent choice for a variety of applications such as automotive lighting, architectural lighting, LED billboards, backlighting, LED signage and LED console and house lighting. It provides excellent performance in terms of constant-current accuracy and dimming capabilities. The MAX16838AUP+ provides an automated system with minimal effort required for setup and optimization.

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