TL494

TL494 SLVS074I – JANUARY 1983 – REVISED JULY 2022 TL494 Pulse-Width-Modulation Control Circuits 1 Features Complete PWM Power-Control Circuitry Uncommitted Outputs for 200-mA Sink or Source Current Output Control Selects Single-Ended or Push-Pull Operation Internal Circuitry Prohibits Double Pulse at Either Output Variable Dead Time Provides Control Over Total Range Internal Regulator Provides a Stable 5-V Reference Supply With 5% Tolerance Circuit Architecture Allows Easy Synchronization 2 Applications Desktop PCs Microwave Ovens Power Supplies: AC/DC, Isolated, With or Without PFC Server PSUs Solar Micro-Inverters Washing Machines: Low-End and High-End E-Bikes Power: Telecom/Server AC/DC Supplies: Dual Controller: Analog Smoke Detectors Solar Power Inverters 3 Description The TL494 device incorporates all the functions required in the construction of a pulse-widthmodulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494 device contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits. The error amplifiers exhibit a common-mode voltage range from –0.3 V to VCC – 2 V. The dead-time control comparator has a fixed offset that provides approximately 5% ...