Texas Instruments TL494IN Voltage Mode PWM Controller, DIP-16, 40V

The Texas Instruments TL494IN is a sophisticated pulse-width-modulation (PWM) control circuit integrated onto a single chip. Designed primarily for power-supply control, this device provides engineers with the flexibility to tailor control circuitry to specific applications, from computer peripherals to communications networking. It incorporates all essential functions, including error amplifiers with a wide common-mode voltage range and an on-chip oscillator.

A key feature is the internal regulator, which provides a stable 5V reference supply with a 5% tolerance, ensuring consistent performance. The controller offers uncommitted outputs capable of sinking or sourcing up to 200mA. Output control allows selection between single-ended or push-pull operation, while internal circuitry actively prohibits double pulses at either output for reliable switching.

Flexible Configuration & Synchronisation

The device supports variable dead time control, offering precise management over the total range, with a fixed offset providing approximately 5% dead time. Its circuit architecture is designed for easy synchronisation, allowing the on-chip oscillator to be bypassed or to drive common circuits in synchronous multiple-rail power supplies. This makes it an excellent choice for complex power management systems.

Robust Operational Specifications

Engineered for reliability, the controller operates from a 7V to 40V supply voltage and can deliver an output voltage up to 40V. It supports a switching frequency from 1kHz up to a typical 300kHz, with a maximum duty cycle of 45%. The component is housed in a through-hole DIP-16 package, ensuring compatibility with standard prototyping and production boards, and is rated for an operating temperature range of -40°C to 85°C.

With its complete PWM power-control circuitry, the TL494IN is a versatile and robust solution for a wide array of electronic design challenges.