FLS3247N

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FLS3247N Application Field and Working Principle

FLS3247N LED driver from FLEXLMOS is a fully integrated 3-string LED driver with buck-boost topology and a wide input voltage operating range typically from 5.5V to 60V. It is mainly used for buck-boost LED applications such as floodlighting, video wall, and car lighting. Due to its dedicated power monitor output, the FLS3247N driver is suitable for dimming applications such as 0-10V dimming and wireless dimming.

Features and Characteristics

• Wide input voltage operating range 5.5V to 60V.
• Three string output control.
• Up to 3.5A current with accurate current sense.
• Adaptive DVS for fast response load transient.
• Dedicated power monitor output.
• High-side current limit.
• Protection features: over temperature, over voltage and short-circuit protection.

Overall Circuit

The FLS3247N LED driver consists of two integrated circuits, a switching buck-boost regulator and a three-channel logic control. It allows up to three strings of LEDs to be driven by the buck-boost regulator with an operating input voltage range from 5.5V to 60V. The three-channel logic control allows the user to control each string individually and accurately. Other features include a power monitor output that can be used for 0-10V and wireless dimming. The FLS3247N LED driver also has over-temperature protection, over-voltage protection, and short-circuit protection.

Working Principle

The FLS3247N LED driver works on the buck-boost topology and has wide input voltage range from 5.5V to 60V. The lower voltage is regulated by the switching buck-boost regulator into a constant-current output that powers the LEDs. The output current is monitored by a current sense resistor. The higher voltage is regulated by the switching buck-boost regulator as well and a maximum current is set by an onboard resistor. The three-channel logic control allows the user to control each string of LEDs and can be used for 0-10V and wireless dimming. The FLS3247N LED driver also has over-temperature protection, over-voltage protection, and short-circuit protection.

Applications

The FLS3247N LED driver is suitable for dimming applications such as 0-10V dimming and wireless dimming. It is mainly used for buck-boost LED applications such as floodlighting, video wall, and car lighting. Due to its wide operating input voltage range and its dedicated power monitor output, the FLS3247N LED driver can be used in a wide variety of LED applications.

Conclusion

The FLS3247N LED driver from FLEXLMOS is a fully integrated 3-string LED driver with buck-boost topology and a wide input voltage operating range typically from 5.5V to 60V. It is mainly used for buck-boost LED applications such as floodlighting, video wall, and car lighting. Due to its dedicated power monitor output, the FLS3247N driver is suitable for dimming applications such as 0-10V dimming and wireless dimming. It has features like adaptive DVS, over temperature protection, over voltage protection, and short-circuit protection.

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