TL494 DESCRIPTION The TL494 incorporates all the functions required in the construction of a pulse width modulation (PWM) control circuit on a single chip. Designed primarily for power supply control, this device offers the flexibility to adapt the power supply control circuit for a specific application. The TL494 contains two error amplifiers, adjustable oscillator on a chip, a dead time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, \u200b\u200b5% accuracy of the regulator and control of the output circuits. The error amplifiers exhibit a common mode voltage range of -0.3 V to VCC - 2 V. The dead time control comparison is an offset that provides approximately 5% of downtime. The on-chip oscillator can be omitted ending the RT reference output and providing a sawtooth input to CT, or can make common rail circuits in synchronous multiple power sources. The uncommitted output transistors provide common emitter or emitter-follower output capability.
The TL494 provides for push-pull or single ended output operation, which can be selected via control output function.
The architecture of this device prohibits the possibility of output pulses twice during push-pull operation. The TL494C is characterized by C. The TL494I is characterized by 70 ° C operating performance C. 0 ° C to 85 ° -40
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