资料介绍
The TL494 incorporate on a single monolithic chip all the functions
required in the construction of a pulse-width-modulation control,
these devices offer the systems engineer the flexibility to tailor ORDERING INFORMATION
the power supply control circuitry to his application.
The TL494 contains an error amplifier, an on-chip adjustable
oscillator, a dead-time control comparator, pulse-steering control
flip-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 control
comparator has a fixed offset that provides approximately 5% dead time when externally altered. The on-chip
oscillator may be bypassed by terminating R T (pin 6) to the reference output and providing a sawtooth in put to
CT (pin 5), or it may be used to drive the common circuits in synchronous multiple-rail power supplies. The
uncommited output transistors provide either common-emitter or emitter-follower output capability. Each Device
provides 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.
required in the construction of a pulse-width-modulation control,
these devices offer the systems engineer the flexibility to tailor ORDERING INFORMATION
the power supply control circuitry to his application.
The TL494 contains an error amplifier, an on-chip adjustable
oscillator, a dead-time control comparator, pulse-steering control
flip-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 control
comparator has a fixed offset that provides approximately 5% dead time when externally altered. The on-chip
oscillator may be bypassed by terminating R T (pin 6) to the reference output and providing a sawtooth in put to
CT (pin 5), or it may be used to drive the common circuits in synchronous multiple-rail power supplies. The
uncommited output transistors provide either common-emitter or emitter-follower output capability. Each Device
provides 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.
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