TL494ID

The TL494ID from Texas Instruments is a complete pulse-width-modulation (PWM) power-control circuitry integrated onto a single chip. Designed primarily for power-supply control, this device provides the flexibility to tailor control circuitry to specific applications. It features 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 device supports multiple topologies such as Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, and Push-Pull. It offers 2 outputs with a maximum duty cycle of 45% and provides control features like dead time control and frequency control.

The TL494ID is housed in a 16-SOIC package and is designed for surface mount applications. It operates within an ambient temperature range of -40°C to 85°C. The uncommitted outputs can provide up to 200mA sink or source current, and the output control function allows selection between single-ended or push-pull operation. The internal circuitry prohibits double pulsing at either output, ensuring reliable operation.