PWM controller for multi-topology power supplies
The Texas Instruments TL494CD is a fixed-frequency PWM controller designed for a wide range of switching regulator topologies including buck, boost, flyback, forward converter, full-bridge, half-bridge, and push-pull configurations. Control features include dead-time control and frequency control, allowing the designer to adjust the overlap between output phases and synchronize to an external clock if needed.
Commercial temperature grade — environment check
It is not qualified for automotive under-hood, outdoor telecom cabinets, or industrial motor drives where ambient temperatures exceed 70°C. For extended-temperature applications, a different controller family with industrial or automotive temperature range would be required.
Lifecycle status — obsolete, last-time-buy concluded
The TL494CD is marked Obsolete by Texas Instruments. No last-time-buy window is currently open. Sourcing is through independent distribution and surplus channels. Buyers should confirm date code and condition at time of order; the part is not available through authorized factory channels. For new designs, a current-production PWM controller with similar functionality should be evaluated.
Sourcing reality for the BOM line
Availability is limited to independent-distributor inventory and surplus lots. Pricing and lead time vary with market conditions and are confirmed at quote time. Buyers should plan for a non-cancellable, non-returnable transaction typical of end-of-life components.