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Pulse Width Modulation Control Circuit TL494CN, Pulse Width Modulation Control Circuit, 16 Pin DIP, Quantity 20, Texas Instruments. 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 tailor the power-supply control circuitry to a specific application. The TL494 contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) 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 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. * Complete PWM Power-Control Circuitry * Uncommitted Outputs for 200-mA Sink or Source Current * Output Control Selects Single-Ended or Push-Pull Operation * Internal Circuitry Prohibits Double Pulse at Either Output * Variable Dead Time Provides Control Over Total Range * Internal Regulator Provides a Stable 5-V Reference Supply With 5% Tolerance * Circuit Architecture Allows Easy Synchronization Click here to see the datasheet. Quantity 20 ..... New Parts !!!!! Be sure to add me to your favorites list! (TL494CN, pulse width modulation control circuit, qty 20 is the responsibility of Tammy May) |
Tammy.may@cedar--rapids.com (Tammy May) for more information.