LT8391AEUFD#PBF

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LT8391AEUFD#PBF is a PMIC (Power Management IC) LED (Light Emitting Diode) driver that can be used to help power LED lighting applications. LT8391AEUFD#PBF is designed with an enhanced power efficiency and provide an excellent protection while driving both high brightness or low power efficiency LED applications.

The LT8391AEUFD#PBF is an integrated switch-mode driver that is designed to save power, space and design complexity by combining both the power supply and switch-mode driver into a single component. The LT8391AEUFD#PBF is also designed to provide power and protection for both high brightness and low power efficiencies LEDs.

The LT8391AEUFD#PBF allows for flexible and reliable design possibilities due to its capability to step down voltage from up to 28V input voltage to an output voltage suitable for driving LEDs with wide current range up to 3.2A. This is accomplished with a switching frequency of up to 500KHz which is adjustable through an external resistor. Adjustable switching frequency allows the user to optimize efficiency or noise performance when driving a variety of LEDs. The LT8391AEUFD#PBF also features adjustable average current limit with fault logic input, a Power Good output (PGOOD) and various protections including open loop/output short circuit/LED over-voltage/under-voltage/over-temperature.

LT8391AEUFD#PBF application fields are wide, ranging from commercial lighting to automotive headlight applications. In commercial lighting, LT8391AEUFD#PBF can be used to drive a variety of dissipative load power sources such as LED luminaries, LED strips, LED panels, LED drivers, LED spotlights, LED strip lights, LED module spotlights, LED flex light strips, LED strip lights with adjustable beam angle and LED dot light strips. In automotive applications, LT8391AEUFD#PBF can be used to drive headlights, as well as dome lights and footwell lights.

The LT8391AEUFD#PBF is also capable of providing power to low power efficiency LEDs such as side marker lights, interior bulbs, license plate lights and turn signal lights. In addition, LT8391AEUFD#PBF can be used in wide range of industrial applications such as emergency lighting and surveillance systems.

The working principle of LT8391AEUFD#PBF is based on the use of buck-boost switching architecture to step down the input voltage down to the desired output voltage level. The buck-boost converter is an efficient and cost effective way of regulating input voltage to generate an output voltage for driving LEDs.Input voltage is stepped down by the switching converter and then rectified and filtered to deliver a clean output voltage.The output voltage is then converted through a current regulator before it is connected to the LED load to drive the LED.The LED current is limited by regulating the current limit settings at the controller itself.The feedback is adjusted to keep the LED current constant over a variety of input voltage conditions.

The LT8391AEUFD#PBF has a wide range of features to provide an excellent protection while driving both high brightness or low power efficiency LEDs. The output voltage is adjustable and there is a standby mode which allows the load to be switched off when not in use. The LT8391AEUFD#PBF also provides an excellent protection by providing over temperature protection, output short protection, LED open loop protection and LED under voltage protection. The LT8391AEUFD#PBF is a perfect choice for LED lighting applications which require an excellent power efficiency and reliable protection.

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