LM3643AYFFR

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

LED Drivers

LED drivers, also known as Pulse Width Modulators (PWM), are used to regulate current supplied to LEDs. The LM3643AYFFR is a pulse width modulated (PWM) current-limited LED driver, designed to drive high output LEDs with maximum efficiency. It is specifically targeted for commercial and industrial applications that require maximum output efficiency from LEDs.

LM3643AYFFR Application Field and Working Principle

• Applications Field: The quick response time of LM3643AYFFR LED drivers make them ideal for LED backlighting and automotive lighting applications. The increased efficiency of LM3643AYFFR drivers can be used as a voltage regulator, dimmable LED driver, constant current source, or general purpose LED driver.
• Working Principle: The LM3643AYFFR driver operates by feeding a continuous current through a very efficient switch, limiting the current and providing a constant output. Its circuitry employs high-side and low-side MOSFETs in a pulse width modulation (PWM) mode to control the output current and power delivered to the driven LEDs. When the voltage at the SENSE pin exceeds the current set-point or when the output current is too large then the protection circuit will activate overtemperature protection and shut down the drivers.

The LM3643AYFFR driver is a single cell Li-Ion battery-operated driver with numerous features, including adjustable current thresholds and pulse-width modulation frequency. The device offers an adjustable 5 to 1000 Hz frequency, flexible current threshold levels up to 1.5A, a shutdown pin, and guaranteed safe output conditions. It also has an operating temperature range that extends from -40°C to 85°C and is designed to provide a non-dimmable LED control solution with an extended operating life.

It is designed with a low quiescent current of 6 μA in normal operation. Additionally, the driver features a wide operating voltage range from 0.9V to 3.6V, with a peak efficiency above 85%. This unique product offer optimizes the LED lifetime, allowing for longer operation with ultra-high luminosity.

The main benefit of the LM3643AYFFR LED driver is its ability to deliver a constant output current with maximum efficiency. This driver is specifically targeted for commercial and industrial applications that require maximum output efficiency from LEDs. With its improved efficiency and quick response time, the LM3643AYFFR driver is an ideal choice for LED backlighting, automotive lighting, and general lighting applications.

In summary, the LM3643AYFFR is a current-limited LED driver designed to drive high output LEDs with maximum efficiency. It is a single-cell Li-Ion battery-operated driver with adjustable current thresholds and pulse-width modulation frequency and a wide range of operating temperatures. The driver has an adjustable 5 to 1000 Hz frequency and a peak efficiency above 85% to maximize the output current of LEDs. This driver is an ideal choice for LED backlighting, automotive lighting, and general lighting applications.

The specific data is subject to PDF, and the above content is for reference