LT3755EMSE#TRPBF

The LT3755EMSE#TRPBF is a monolithic switching current regulator with direct onboard regulation control that can be used to accurately control constant current output in a number of applications. The device is primarily designed for driving LEDs but can also be used in other regulated current applications. With market-leading efficiency, its main application is to drive high-brightness LEDs (HB LEDs) for applications in various industrial, automotive, and commercial lighting applications.

The LT3755EMSE#TRPBF works by controlling the current flow in HB LEDs accurately in input voltages ranging from 4.5V to 42V. The LED current is programmable from 1mA to 500mA with high accuracy (± 10%) and excellent ripple rejection performance. The device also provides temperature compensation and has an active current limit feature to protect against current overshoot. It is suitable for use in high temperature applications and can operate over the junction temperatures ranging from -40 °C to +125 °C.

In terms of its external components, it consists of a high-side n-channel MOSFET, low-side p-channel MOSFET, resistors and RC filter components. The LT3755EMSE#TRPBF is designed to regulate the average current flowing through the LEDs. The voltage is programmed via the voltage divider and the reference current is set by a single resistor. The device uses an internal oscillator to regulate the current flow through the LEDs and ensure a stable output.

The LT3755EMSE#TRPBF is ideal for direct AC line and single battery applications, and is suitable for use with switching power topologies, including flyback and boost, as well as integrated inductors. It also has several design features to maximize efficiency and reduce radiated noise and EMI, such as spread-spectrum dimming, constant-on-time, and tracking mode. With its high efficiency, accurate current control, and wide input and output range, it is an ideal choice for cost-effective LED lighting designs.

The LT3755EMSE#TRPBF is an excellent choice for driving HB LEDs in a variety of industrial, commercial, and automotive applications. With its support for common-mode transient suppression and built-in EMI filters, it provides robust and reliable operation in any environment. Its efficient design also ensures that it is cost-effective and can be used in cost-sensitive applications. The device also provides designers with a wide range of features that give them freedom in their design choices and make their designs more reliable and robust.