Texas Instruments' TPS92411 is a 100 V floating MOSFET switch for use in offline LED lighting applications. It is used in conjunction with a current regulator that can achieve greater than 0.9 power factor to create an 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 saving size and cost.
Slew controlled low-frequency operation of the TPS92411 switches creates very little EMI. 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 is possible. Other features include a UVLO circuit to monitor when the device has sufficient voltage to operate properly and overvoltage protection.Features