-40%
TL494CN TL494 Pulse-Width-Modulation Control Circuit DIP16
$ 2.77
- Description
- Size Guide
Description
TL494 Pulse-Width-Modulation Control CircuitDescription
The TL494 device 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 device 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 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°C to 70°C
Features
Complete PWM Power-Control Circuitry
Uncommitted Outputs for 200mA 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
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