LT3955EUHE#PBF

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The LT3955EUHE#PBF is a high side, constant current, PWM-controlled switch and buck regulator with a single-inductor buck architecture. It has a wide range of applications in the field of LED drivers, motor drivers, inductive loads, and other power management applications. This brief article discusses the applications and working principle of the LT3955EUHE#PBF, and the advantages it offers.

Applications of the LT3955EUHE#PBF

The LT3955EUHE#PBF features an integrated N-channel MOSFET and an internal low-noise PWM control architecture, making it ideal for driving high-power LEDs or multiple LEDs in series applications. It has a high maximum output current, up to 600mA, and can be used to drive up to 32 LEDs in series with a minimum voltage drop of 0.4V. The LT3955EUHE#PBF also features soft start and over-temperature protection features, and is able to operate from either a 2.5V to 24V input voltage and from a 2.5V to 39V output voltage.

In addition to LED driver applications, the LT3955EUHE#PBF is also suitable for other power management applications, such as motor drivers and inductive loads. It can be used to drive motors with an inductive load up to 600mA, with a minimum voltage drop of 0.4V. It is also suitable for DC-DC converters and other power management applications, providing an efficient, reliable and highly integrated solution.

Working Principle of the LT3955EUHE#PBF

The LT3955EUHE#PBF features a single-inductor buck architecture, whereby the input voltage is converted to a regulated DC output voltage. The LT3955EUHE#PBF integrates an N-channel MOSFET, a low-noise PWM dimming comparator and an internal error amplifier. The integrated PWM dimming comparator is used to regulate the output voltage and current from the converter, by modulating the duty cycle of the switch on the high side of the inductor. This allows for a highly efficient, accurate and reliable LED driver or other power management application.

The LT3955EUHE#PBF also features an internal error amplifier, which senses the output voltage and adjusts the PWM duty cycle accordingly. Furthermore, the integrated over-temperature and under-voltage protection circuits ensure safe and reliable operation in a wide range of applications.

Advantages of the LT3955EUHE#PBF

The LT3955EUHE#PBF offers a range of advantages over other LED driver solutions. It is highly integrated, featuring an N-channel MOSFET, PWM dimming comparator, under-voltage and over-temperature protection circuits, and an internal error amplifier. This makes it an efficient, reliable and cost-effective solution for a wide range of LED driver and power management applications. Furthermore, it offers a high maximum output current, up to 600mA, and can drive up to 32 LEDs in series with a minimum voltage drop of 0.4V.

The LT3955EUHE#PBF also has a wide input voltage range, from 2.5V to 24V, and is also suitable for applications with a high output voltage, up to 39V. In addition, it features a soft start function for smooth start up, as well as a maximum power indicator for feedback on the maximum power consumption. Therefore, the LT3955EUHE#PBF is an ideal solution for a range of LED driver and power management systems.

Conclusion

The LT3955EUHE#PBF is a high side, constant current, PWM-controlled switch and buck regulator with a single-inductor buck architecture. It is suitable for a range of LED driver and power management applications, offering an efficient, reliable and cost-effective solution. Furthermore, it has a wide range of features, such as an integrated N-channel MOSFET, a low-noise PWM dimming comparator and internal error amplifier, making it an ideal solution for a range of LED driver and power management systems.

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