Spec

• 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 toVCC - 2 V.　The dead-time control comparator has a fixed offset that providesapproximately 5% dead time.　The on-chip oscillator can be bypassed by terminatingRT to the reference output and providing a sawtooth input to CT, or itcan 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.　TheTL494I device is characterized for operation from -40°C to 85°C.Complete PWM Power-Control CircuitryUncommitted Outputs for 200 mA Sink or Source CurrentOutput Control Selects Single-Ended or Push-Pull OperationInternal Circuit Prohibits Double Pulse at Either OutputVariable Dead Time Provides Control Over Total RangeInternal Regulator Provides a Stable 5-V Reference Supply With 5% ToleranceCircuit Architecture Allows Easy Synchronization [Main Specifications]
• TopologyBoost
• Buck
• Flyback
• Forward
• Full-Bridge
• Half-Bridge
• Push-Pull
• Control MethodVoltage
• Vin(Min)(V)-0.3
• Vin(Max)(V)38
• Frequency(Max)(kHz)300
• UVLO Thresholds On/Off(V)N/A
• Duty Cycle(Max)(%)45
• Gate Drive(Typ)(A)0.2
• FeaturesAdjustable Switching Frequency
• Error Amplifier
• Multi-topology
• Operating Temperature Range(C)0 to 70
• Pin/Package16SO
• RoHS Compliance
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