TL494 incorporates all functions required to construct a PWM pulse width modulation control circuit. It is best designed primarily for power-supply control, especially switching converter such as buck, boost and buck-boost. TL494 contains two error ampliers, adjustable oscillator, a dead-time control 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% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies. The uncommitted output transistors provide either common-emitter or emitter-follower output capability. The TL494 device provides for push-pull or single-ended output operation, which can be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation.
The TL494C device is characterized for operation from 0\u00b0C to 70\u00b0C. The TL494I device is characterized for operation from ?40\u00b0C to 85\u00b0C.
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