LT3519IMS#PBF

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The LT3519IMS#PBF IC is a powerful example of modern PMIC, or Power Management Integrated Circuit, technology. Developed by Linear Technology, the LT3519IMS#PBF is an LED driver designed to power LED strings in a multitude of applications. This LED driver offers a wide range of features that make it suitable for a variety of LED lighting applications.

Applications

The LT3519IMS#PBF is designed to conveniently connect to LEDs in various ways. The IC can be used to drive current-regulated LED strings with no additional components and can be directly connected to a DC adapter to power the LEDs and provide current in either a series or parallel configuration. This makes the IC suitable for LED strips, LED billboards, LED panels and LED accent lighting.

Other common applications for the LT3519IMS#PBF include LED backlighting controllers, LED driver modules, LED dimmable power supplies, LED lamps and LED signs.

Functionality

The LT3519IMS#PBF consists of two main parts: the main controller and the LED driver circuitry. The main controller creates a pulse-width modulated (PWM) output based on a control signal, either from an external PWM signal or from an internal clock. This PWM signal powers the LED driver circuitry, which uses a high-side switch and a low-side switch to fully control the current flowing through the LEDs. The LT3519IMS#PBF is capable of controlling both current-regulated and voltage-regulated LED strings.

The LT3519IMS#PBF has a wide operating range and can be used with input voltages between 4.5 V and 15 V. The power conversion efficiency is up to 95.5%. Furthermore, the device has an operating frequency of 200 kHz and is rated for ambient temperatures from -40°C to +85°C.

Smart Features

The LT3519IMS#PBF has two unique features that make it even more efficient and convenient to use. The first feature is the “Foldback” protection mode which turns off the high-side and low-side switch when the loop current exceeds the over-temperature/over-current protection limit. This prevents the IC from overloading itself.

The second feature is the “Power Bonus” feature. This feature allows the LED driver to use the inductor output voltage to reduce the power losses that occur in the high-side switch. This reduces the current flow of the LED driver, increasing efficiency and reducing power dissipation. Furthermore, it can enable the LED driver to operate at lower input voltages.

Conclusion

The LT3519IMS#PBF is a leading example of today’s PMIC technologies. This LED driver is suitable for a variety of LED applications and features smart features such as “Foldback Protection” and “Power Bonus” to provide exceptional power efficiency. With its wide operating frequency range, high efficiency, and robust temperature range, the LT3519IMS#PBF is the ideal choice for a variety of LED applications.

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