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The TL494 incorporate on a single monolithic chip all the funcTIonsrequired in the construcTIon of a pulse-width-modulaTIon control,these devices offer the systems engineer the flexibility to tailor ORDERING INFORMATIONthe power supply control circuitry to his application.The TL494 contains an error amplifier, an on-chip adjustableoscillator, a dead-time control comparator, pulse-steering controlflip-flop, a 5-volt, 5% precision regulator, and output-control circuit.The error amplifier exhibits a common-mode voltage range from -0.3 volts to Vcc -2 volts. The dead-time controlcomparator has a fixed offset that provides approximately 5% dead time when externally altered. The on-chiposcillator may be bypassed by terminating R T (pin 6) to the reference output and providing a sawtooth in put toCT (pin 5), or it may be used to drive the common circuits in synchronous multiple-rail power supplies. Theuncommited output transistors provide either common-emitter or emitter-follower output capability. Each Deviceprovides for push-pull or single-ended output operation, which may be selected through the output-control funct-ion. The architecture of these devices prohibits the possibility of either output being pulsed twice during push-pull operation.
