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LT3478EFE-1#PBF application field and working principle

PMIC - LED Drivers

The LT3478EFE-1#PBF is a highly versatile DC/DC converter from Linear Technology, a leading global provider of integrated power management solutions. The device is a monolithic synchronous active-clamp buck-boost converter that can deliver up to 9A of output current from a wide range of input voltages. The device operates from an input voltage range of 2.5V to 30V and has adjustable output voltages from 0.8V to 24V. It is designed to be used in applications requiring high efficiency, small size, and wide input voltage range. The LT3478EFE-1#PBF has a few features that make it ideal for LED lighting applications.

The LT3478EFE-1#PBF is designed for high power efficiency, up to 96%, and it can deliver up to 9A of output current with a wide input voltage range of 2.5V to 30V, allowing it to be used in a variety of lighting applications. It also offers protection features such as adjustable cycle-by-cycle current limit, input under voltage lockout and output over voltage protection, which ensure safe and reliable operation. The device also has a high light load efficiency of greater than 90%, and low ripple to ensure uniform light output. Furthermore, the LT3478EFE-1#PBF is designed to be extremely reliable, with proven long term stability and open LED protection.

The LT3478EFE-1#PBF uses a synchronous buck-boost topology, in which the rectified input voltage is compared to the output voltage, and the Feedback Voltage (VFB) is set by an internal or external potentiometer. The device will then regulate the output voltage by switching an internal boost and buck switch at the same time, through a process of charging and discharging an internal power switch capacitor (CAP). The LT3478EFE-1#PBF is configured to operate as a constant current source, allowing it to regulate the LED current even if the LED voltage changes. The device also has input under voltage lockout, thermal shutdown, and output over voltage protection, for safe and reliable operation in a variety of applications.

In summary, the LT3478EFE-1#PBF is a monolithic synchronous active-clamp buck-boost converter from Linear Technology, designed to be used in high power LED lighting applications. It has an input voltage range of 2.5V to 30V and adjustable output voltages from 0.8V to 24V. It offers up to 9A of output current with a high efficiency of up to 96%, and protection features such as adjustable cycle-by-cycle current limit, input under voltage lockout, and output over voltage protection. The LT3478EFE-1#PBF is designed to be extremely reliable, with proven long term stability and open LED protection. It is the perfect choice for LED lighting applications demanding high efficiency, small size, and wide input voltage range.

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