What this offline switcher does on your board
The Texas Instruments TPS92314ADR/NOPB is an AC DC offline switcher controller designed for LED lighting applications. It uses a flyback topology and operates without an internal power switch, meaning an external MOSFET handles the high-voltage switching. The controller runs from a 13 V to 35 V supply rail and switches between 60 kHz and 150 kHz, a range that lets you balance transformer size against EMI filter cost.
Because the TPS92314ADR/NOPB has no internal switch, the BOM must include an external MOSFET, its gate-drive resistor, and snubber components. This gives you flexibility in choosing the FET's RDS(on) and voltage rating to match the LED load current and line voltage, but it also adds a sourcing line item and board area. The flyback topology provides galvanic isolation between the AC line and the LED output, which is typical for offline luminaires that must meet safety creepage and clearance requirements.
Switching frequency: 60 kHz to 150 kHz
The 60 kHz to 150 kHz range is a practical band for flyback LED drivers: lower frequencies reduce switching losses and simplify EMI filtering but require a larger transformer; higher frequencies shrink the magnetics at the cost of more gate-drive loss and potential radiated emissions. The controller's internal oscillator is trimmed, so you don't need an external timing resistor — the frequency is set by the part itself, which saves a passive component.