LT3743IUFD#TRPBF

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The LT3743IUFD#TRPBF is a PMIC, or power management IC, part of the TI Precision Power LED Driver family. It provides efficient, reliable, and adjustable LED drive current, based on the requirements of the application. The LED driver can be used in a variety of LED lighting applications, from LED torches, to LED billboards and lighting controllers, among others.

The LT3743IUFD#TRPBF is a current-mode, low-cost control IC capable of delivering up to 250mA of LED current over a wide range of input voltages from 8V to 40V. The device allows for flexibile light output through an adjustable duty cycle range of 0.1% to 99.9%, and also supports dimming functions such as flicker-free PWM with a frequency range of 100Hz to 120KHz.

In addition to providing reliable LED lighting current, the LT3743IUFD#TRPBF also features a variety of safety features that help protect the device and the LED application against fault conditions. These include integrated thermal shutdown, overvoltage protection, open LED protection, and ripple current protection.

The working principle of the LT3743IUFD#TRPBF is based on the use of a fixed switching frequency/period current-mode controller, which operates by first detecting when the inductors current has reached a peak. The device then quickly switches the output current to the other inductor, thus providing continuous current flow to the LED load.

The LT3743IUFD#TRPBF is a highly efficient device, and is capable of providing up to 95% efficiency when driving a 4V LED with 5V input. It also features a low operating quiescent current of only 12.2µA, which helps minimize battery drain in battery-powered LED applications.

InSummary, the LT3743IUFD#TRPBF is a low-cost and highly efficient LED driver for use in a variety of LED lighting applications. The device is based on a current-mode, fixed switching frequency/period controller and is capable of delivering up to 250mA of LED current with up to 95% efficiency. In addition, safety features such as integrated thermal shutdown, overvoltage protection, open LED protection, and ripple current protection offer reliable protection from fault conditions.

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