TL494CN Part Information

Details for TL494CN by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Power Management

Part Description

The TL494 device incorporates all the functions required in the construction of a pulse-widthmodulation (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 singleended 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. The TL494I device is characterized for operation from –40°C to 85°C.

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Part Features

  • Circuit Architecture Allows Easy Synchronization
  • Complete PWM Power-Control Circuitry
  • Internal Circuitry Prohibits Double Pulse at Either Output
  • Internal Regulator Provides a Stable 5-V Reference Supply With 5% Tolerance
  • Output Control Selects Single-Ended or Push-Pull Operation
  • Uncommitted Outputs for 200-mA Sink or Source Current
  • Variable Dead Time Provides Control Over Total Range

Part Specifications

Input Voltage 13V
Output Voltage 40V
Output Current 200mA
Supply Voltage Min 7V
Supply Voltage Max 40V
Controller IC Case Style DIP
No. of Pins 16Pins
Frequency 300kHz
Operating Temperature Min 0°C
Operating Temperature Max 70°C
Product Range TL494
Automotive Qualification Standard -
MSL -
SVHC No SVHC (27-Jun-2018)
IC Generic Number 494
IC Temperature Range Commercial
Operating Temperature Range 0°C to +70°C
Output Current Max 0.2A
Output Type Voltage
Supply Voltage Range 7V to 40V
Termination Type Through Hole
RoHS Compliant

Alternative Part Descriptions

  • PWM Control Circuit TL494CN | RS Components
  • SWITCHED MODE CONTROLLER, DIP, 494; Input Voltage:13V; Output Voltage:40V; Output Current:200mA; Supply Voltage Min:7V; Supply Voltage Max:40V; Controller IC Case Style:DIP; No. of Pins:16Pins; Frequency:300kHz; Operating TemperatureRoHS Compliant: Yes | Newark Electronics
  • 40V, 0.2A 300KHz PWM controller | Texas Instruments
  • Switching Controller [Texas Instruments] TL494CN Switching Controller | Distrelec

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