MAX16826AGJ/VY+T

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The MAX16826AGJ/VY+T Part is a high-efficiency, PWM-dimmable, integrated 1.2A step-down LED driver. It is designed to enable a constant-current supply to lighting arrays. The MAX16826AGJ/VY+T is suitable for driving large arrays of LEDs in high powered illumination applications.

The MAX16826AGJ/VY+T Part is designed to operate from 7V to 42V input supplies. The Part delivers up to 1.2A of continuous drive current and are available in both adjustable- and fixed-output versions. The parts are available in both an adjustable and fixed output version.

The MAX16826AGJ/VY+T includes a high-frequency, constant on-time step-down controller that creates an adjustable 1%-100% PWM dimming range with an integrated digital input pins for a control interface. The MAX16826AGJ/VY+T also includes an internal temperature monitoring system that guarantees safe operating temperature and prevents thermal run-away.

The Part operates in frequency foldback and over-temperature protection modes to minimize power dissipation in LED strings. The MAX16826AGJ/VY+T has protection against undervoltage, overvoltage, open LED detection, over-temperature and short circuit conditions.

Application Field:
The MAX16826AGJ/VY+T is well qualified for applications in interior lighting, such as cove lighting, illuminated wall sconces, edge-lighting and false-ceiling applications. This Part also meets the requirements for many low voltage lighting applications in dedicated 24V and 12V power systems. Applications for the MAX16826AGJ/VY+T include LED advertising boards, LED Strips, LED Street Lighting and LED Decorative Lighting.

Working Principle:
The MAX16826AGJ/VY+T voltage regulator is a high efficiency DC-DC buck converter. It uses a synchronous architecture to convert input voltage to a regulated output voltage. The Part offers adjustable output voltage by analog or digital interface. It operates with input voltage up to 42V and delivers up to 1.2A output current at high efficiency. The device supports PWM dimming with an integrated dimming input of 1%-100%. The Part features cycle-by-cycle current limit, short circuit protection and input undervoltage and overvoltage protection.

The MAX16826AGJ/VY+T integrates an internal temperature monitoring system that safeguards the part operation from damage due to hot spots in the driver or LED string. When any LEDs are switched off, the driver goes into a high frequency, constant on-time foldback mode for reducing power dissipation. Frequency foldback is enabled when the LED current is reduced to around 25% (or less) of the nominal operating current.

The MAX16826AGJ/VY+T LED driver is designed to meet stringent efficiency, high power factor (PF), power density, and dynamic load handling requirements. The small form-factor Part is offered in a very compact, 8-pin DFN package and is an ideal solution for driving large arrays of LEDs in high powered illumination applications.

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