TL494CD

The TL494CD is a versatile pulse-width-modulation (PWM) control circuit integrated onto a single chip by Texas Instruments. It is primarily designed for power-supply control applications, offering flexibility for specific design needs. This device incorporates features such as two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V precision regulator, and output control circuits.

Key electrical specifications include an operating voltage range of 7V to 40V and a frequency range from 1kHz to 300kHz. The maximum duty cycle is 45%. It supports various topologies including Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, and Push-Pull configurations. The device features uncommitted outputs capable of 200-mA sink or source current and provides control features like dead time control and frequency control.

The TL494CD is housed in a 16-SOIC package and is designed for surface mounting. It operates within an ambient temperature range of 0°C to 70°C. The internal regulator provides a stable 5V reference supply with 5% tolerance. The architecture prohibits double pulsing at either output, ensuring reliable operation in push-pull configurations. This PWM controller is suitable for applications requiring precise power management and control.