LT3597EUHG

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LT3597EUHG is a high-performance High-Voltage, 5.2V linear white LED driver with a wide output voltage range of 2.6V to 28V. It has a high-efficiency single-stage 1MHz switching architecture that eliminates the need for external inductors and provides exceptionally high output power with excellent long-term stability and efficiency. The LT3597EUHG is well-suited for high-end Solid State Lighting, decorative lighting, PWM dimming, and other applications requiring Controlled, high-Voltage linear output and tight current matching provided by the built-in series regulator.

LT3597EUHG is part of a family of LED driver products. It is categorized as a Power Management Integrated Circuit (PMIC) LED Driver, also known as LED backlight driver. PMIC LED Drivers are designed to provide power control, drive, and protection to LEDs. LT3597EUHG’s voltage-mode control and integrated trim network enable precise supply voltages to many white LEDs within one buck-boost-regulation topology. This multi-LED power converter can be employed to drive multiple strings of 1 to 3 LEDs units in series, with the number of strings being limited only by the input-output voltage across the device.

At the heart of the device is an on-chip high-voltage power switch with integrated power loss transistor, as well as a low-voltage regulator. The high-voltage power switch, also known as a switching controller, is a type of voltage-mode PWM (pulse width modulated) controller. It is used to rapidly vary the current in a switching power converter circuit, thus controlling the output power delivered to the load. The on-chip low-voltage regulator is used to provide supply voltage to the control circuitry, as well as power dissipation protection. This allows the device to be powered from a wide range of input voltage sources.

In addition to its voltage-mode based output regulation, the LT3597EUHG also provides programmable current regulation and precision current matching. It is designed to provide precise matching of the channel currents when driving two or more strings of LEDs in parallel. This is accomplished by the integrated series of current setting resisters, as well as multiple external programming options. With the integrated series regulator network, precise current matching is achievable over a wide range of output load conditions.

The LT3597EUHG also offers built-in protection features such as over-voltage protection, over-current protection, and thermal protection. These protect the LED driver from potential damage or destruction due to excessive input voltage, excessive current draw, or overheating. The integrated thermal protection feature can be enabled or disabled via an external pin.

In summary the LT3597EUHG provides an extremely versatile and power-efficient LED driver solution for many Solid State Lighting, decorative lighting, and general white LED applications. The device boasts an extremely high efficiency and power output that can be matched to the exact application requirements, while also providing robust protection features.

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