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  您的位置: 首页 >> 集成电路 >> ST >> TL494IDR
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TL494IDR
元件品牌:ST
元件型号:TL494IDR
采购数量:
 

详细参数

TL494IDR Description

 

The TL494IDR 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 TL494IDR 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. The TL494IDR device is characterized for operation from –40°C to 85°C.

 

Features

 

  • 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

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