LT3518HFE#PBF

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The LT3518HFE#PBF is a high frequency, current-mode, boost controller that is part of PMIC - LED Drivers and is capable of providing up to 11W output power and up to 4A output of current that enable high OLED, LED lighting and small form factor wireless charger designs. The ability of the LT3518HFE#PBF to provide a current-mode control scheme, which operates up to 100KHz enables efficient, accurate, and fast response time design. Also a 3-in-1 package makes the controller a solution for small size designs.

The LT3518HFE#PBF is designed to be the optimal choice for applications such as OLED and LED lighting, small form factor wireless chargers, and power distribution and switching power supplies.

The working principle of the LT3518HFE#PBF is based on a current-mode control scheme. This controller limits output current through sensing the inductor current. The voltage across the inductor current is compared with an internal oscillator’s triangular waveform which is then processed into an error signal. Following, the error signal is converted into an output voltage that varies with the difference in the inductor current voltage and the triangle waveform voltage. Through this approach, the current mode controller can quickly adjust output current and efficiently limit its peak value.

Furthermore, the LT3518HFE#PBF has the added feature of a low-side dedicated sense follower, which reduces the voltage drop across the sense resistor by one-third compared to the traditional solution. This provides improved load transient performance and increased conversion efficiency.

In conclusion, the LT3518HFE#PBF is an excellent choice for OLED, LED Lighting, small form factor wireless chargers and other similar applications due to its high energy efficiency, fast response time, and space saving credentials. By offering current-mode control, the controller limits the output current, quickly adjusts for load regulation, and provides improved efficiency.

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