LT3743IFE

LT3743IFE, a high voltage LED driver, is a highly efficient inductive buck boost regulator. As an integral member of the PMIC - LED drivers, the LT3743IFE provides a combination of an integrated high voltage MOSFET switch and control circuitry. The LT3743IFE is designed to maintain LED current over a wide range of supply voltage, providing high performance and flexibility.

The LT3743IFE is designed to drive high brightness LEDs from small battery sources. It drives multiple LEDs with linear current control. The LT3743IFE has a wide input voltage range of 1.2V to 8.4V and can be used for driving 1 to 4 LEDs in series and parallel. The output current can be adjusted from 0 to 1.1A with 0.5% accuracy. The LT3743IFE also integrates LED current balancing, LED differential current sensing and LED open circuit protection.

The LT3743IFE can be controlled through an external PWM signal to regulate the LED current. It also has an enable signal to allow the LED current to be turned continuously on and off without adding any EMI. The LT3743IFE allows the LED current to be controlled in both open loop and closed loop modes.

The working principle of the LT3743IFE involves two main steps. First, the device regulates the input voltage to a preset level corresponding to the desired LED current. This is done through a boost inductor and a high side MOSFET switch to generate a DC voltage at the input. The second step is to regulate the output current. This is done through a buck inductor and a low side MOSFET switch. The LT3743IFE constantly monitors the LED current to make sure the desired current value is maintained.

The LT3743IFE is used in a wide range of applications including automotive lighting, medical lighting, flash lighting and general lighting. It is a highly efficient and cost-effective solution for driving high-power LED applications. The device is designed to be robust and provides protection features against short circuit, overvoltage, overcurrent and overtemperature faults.

In conclusion, the LT3743IFE is a high performing, highly efficient induction buck boost regulator designed to drive multiple LEDs in series and parallel. The device is part of the PMIC - LED Drivers family and offers superior performance and flexibility due to its wide input voltage range, excellent accuracy and various protection features. The LT3743IFE is used in a variety of lighting applications and is an ideal solution for driving high-power LED applications.