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  　　3 Description The TL494 device incorporates all the functions 1• Complete PWM Power-Control Circuitry required in the construction of a pulse-width- • Uncommitted Outputs for 200-mA Sink or modulation （PWM） control circuit on a single chip. Source Current Designed primarily for power-supply control， this • Output Control Selects Single-Ended or device offers the flexibility to tailor the power-supply Push-Pull Operation control circuitry to a specific application. • Internal Circuitry Prohibits Double Pulse at The TL494 device contains two error amplifiers， an Either Output on-chip adjustable oscillator， a dead-time control • Variable Dead Time Provides Control Over （DTC） comparator， a pulse-steering control flip-flop， a Total Range 5-V， 5%-precision regulator， and output-control circuits. • Internal Regulator Provides a Stable 5-V Reference Supply With 5% Tolerance The error amplifiers exhibit a common-mode voltage range from –0.3 V to VCC – 2 V. The dead-time • Circuit Architecture Allows Easy Synchronization control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator 2 Applications can be bypassed by terminating RT to the reference • Desktop PCs output and providing a sawtooth input to CT， or it can drive the common circuits in synchronous multiple-rail • Microwave Ovens power supplies. • Power Supplies： AC/DC， Isolated， With PFC， 》 90 W The uncommitted output transistors provide either common-emitter or emitter-follower output capability. • Server PSUs The TL494 device provides for push-pull or single- • Solar Micro-Inverters ended output operation， which can be selected • Washing Machines： Low-End and High-End through the output-control function. The architecture of this device prohibits the possibility of either output • E-Bikes being pulsed twice during push-pull operation. • Power Supplies： AC/DC， Isolated， No PFC， 《 90 W The TL494C device is characterized for operation from 0°C to 70°C. The TL494I device is characterized • Power： Telecom/Server AC/DC Supplies： for operation from –40°C to 85°C. Dual Controller： Analog • Smoke Detectors Device Information（1） • Solar Power Inverters PART NUMBER