MAX16814ATP/V+

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The MAX16814ATP/V+ is a high-efficiency, low-saturation, and high-accuracy boost converter LED driver. It is a compact, low-power and high-performance solution for driving single, dual and triple light-emitting diodes (LEDs) from input voltages up to 45 volts. It also provides automatic current-sharing for multiple LEDs in parallel. The MAX16814ATP/V+ is designed in PMIC – LED Drivers category.

Application Field

The MAX16814ATP/V+ is suitable for applications in aircraft cabins and interiors, automotive headlights, general-purpose signal lights and industrial light bars. This LED driver is also suitable for lighting solutions such as medical devices, street lamps, wall washers, and OLED panel backlighting. Furthermore, its low-power performance benefits applications in optical data-storage products and portable display devices, as well as its superior temperature stability offering a long-term stable life.

Working Principle

The MAX16814ATP/V+ consists of several internal parts, starting with the SEGA switching converter, a comparator, and a low-time-constant loop that dynamically tracks the input voltage, providing fast transient response and tight line regulation over variations. Its internal boost switching converter uses an inductor and capacitor to create a constant-current source. As the load demand is changed, the resistance at the output determines the output current, which is then monitored and regulated by the internal circuitry. This ensures that output current remains constant over temperature and line voltage variations.

The MAX16814ATP/V+ incorporates a low-time-constant feedback loop for over-voltage protection and a fast transient response. It uses hysteretic current-mode switching to provide a wide-duty-cycle range and improve the loop response to input transients. It also features a double-drain diode to provide brief current spikes, which allows the boost and associated components to operate over a wide temperature range.

The MAX16814ATP/V+ also provides an adjustable over-voltage (OVP) threshold, adjustable soft-start time, and adjustable average current limiting. It also features low quiescent current, over-temperature shutdown, and thermal overload protection. This LED driver also offers adjustable output current ramp-rate control and power-on-reset. In addition, it features integrated high-side and low-side power FETS to reduce the external component count.

Conclusion

The MAX16814ATP/V+ high-efficiency, low-saturation, and high-accuracy boost converter LED driver is designed for applications in aircraft cabins and interiors, automotive headlights, general-purpose signal lights and industrial light bars. It consists of several integral components such as its SEGA switching converter, a comparator, and a low-time-constant loop to provide fast transient response and tight line regulation. It also offers several features, such as an adjustable over-voltage (OVP) threshold, adjustable soft-start time, and adjustable average current limiting. Additionally, it features low quiescent current, over-temperature shutdown, and thermal overload protection.

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