PWM controller with 1 kHz to 300 kHz switching — topology fit
The TL494CDRE4 is a fixed-frequency PWM controller from Texas Instruments that drives transistor outputs across a 1 kHz to 300 kHz switching range. The 7 V to 40 V supply range lets it run directly off 12 V, 24 V, or 48 V industrial rails without a separate bias regulator — a clean BOM simplification for multi-rail power supplies.
Commercial temperature grade — indoor and bench use
It is not specified for automotive under-hood or outdoor telecom cabinets where the ambient exceeds 70 °C.
16-SOIC narrow body — layout and thermal limits
Housed in a 16-SOIC narrow-body package (3.90 mm width), the TL494CDRE4 uses the standard SOIC-16 footprint. There is no exposed thermal pad, so the junction-to-ambient thermal resistance is higher than in a TSSOP with pad — keep the total power dissipation below ~0.8 W in still air at 25 °C ambient.
Sourcing and lifecycle — active production
This is the tape-and-reel ordering code for the commercial-temperature variant. The base product number is TL494; other suffix options (TL494CD, TL494ID) differ by temperature grade or package. Confirm the exact suffix matches your BOM before ordering.