The TPS92411 is a 100-V floating MOSFET switch for use in offline LED lighting
applications. The device is used in conjunction with a current regulator that can achieve a power
factor greater than 0.9 to create a LED drive solution with low-ripple current. When properly
designed, solution performance is comparable to traditional flyback, buck or boost-based AC/DC LED
drivers. The approach requires no inductive components, thus saving size and cost. Slew-controlled
low-frequency operation of the TPS92411 switches creates very little EMI. Detailed operation is
described in the Application Information section.
Package options include SOT23-5 and PSOP-8 allowing the user to
optimize for small size or scale for high power. Using the PSOP-8 package, design of LED luminaires
up to 70 W or more is possible. Other features include a UVLO circuit to monitor when the device
has sufficient voltage to operate properly and over-voltage protection (TPS92411P).
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