Texas Instruments TL494 PWM Control Circuit TL494CDRG4

The TL494 PWM Control Circuit from Texas Instruments is designed for power-supply control applications. It integrates two error amplifiers, an adjustable oscillator, a dead-time control comparator, and output-control circuits on a single chip. The device supports both push-pull and single-ended output configurations, with uncommitted output transistors capable of sourcing or sinking up to 200 mA. It features a 5-V precision regulator with a tolerance of 5%, and the architecture allows for easy synchronization in multiple-rail power supplies. The TL494 operates within a temperature range of 0¬8C to 70¬8C, making it suitable for various applications, including desktop PCs, microwave ovens, and power supplies. The dead-time control provides approximately 5% dead time, enhancing the flexibility of the PWM control. The device is available in multiple package options, including SOIC, PDIP, and TSSOP, facilitating integration into different designs.