LM3639AYFQR Integrated Circuits (ICs)

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The LM3639AYFQR is a high efficiency current-regulated LED driver featuring up to 93 percent efficiency. It is suitable for driving either small or large LED arrays from a wide input voltage range. The LED driver can work in low inductance circuitry for improved system efficiency and maximum LED current accuracy. The LM3639AYFQR is classified as a PMIC (power management integrated circuit) LED driver.

The LED Driver features an integrated high-side bipolar current-regulating transistor with a typical 817% duty cycle, a high efficiency current-regulated DC-DC converter, an adjustable current source, and a low voltage buck regulator. It also includes protection features such as over temperature protection, over-current protection, and reverse polarity protection. The adjustable current source allows for independent adjustment of the LED current from 0.7V to 18V. The current can also be fine-tuned to provide optimal LED illumination.

The PMIC LED driver includes several additional features that are beneficial for system designers. It has a fast transient response, high accuracy and low power dissipation. It is also capable of sustaining continuous current overloads up to four times its rated current. This allows for the use of higher currents when needed without sacrificing the reliability of the device. It also features thermal protection and a low voltage shutdown circuit to protect the connected LEDs.

The LM3639AYFQR is suitable for a variety of applications such as directional lighting, general lighting, automotive lighting and LCD backlighting. With its wide input voltage range and low input current, it can be used in many different systems. It is also capable of driving multiple LEDs in parallel, thus making it ideal for larger and brighter applications.

In addition to its high efficiency current-regulating design, the LM3639AYFQR offers a variety of safety features, making it an ideal choice for applications requiring a high degree of safety. It also provides a very reliable power supply to the connected LEDs, maintaining a consistent level of illumination even when operating under varying conditions.

The LM3639AYFQR is an excellent choice for applications requiring high efficiency, long lifetime, and reliability. With its integrated protection features, wide input voltage range and low input current, it is ideal for applications such as directional lighting, general lighting, automotive lighting and LCD backlighting. Furthermore, its adjustable current source and low voltage buck regulator make it a great choice for applications where precise current regulation and maximum LED brightness is required.

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