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TL594-脉宽调制 (PWM) 控制电路
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TI产品 - TL594介绍

TL594 - 脉宽调制 (PWM) 控制电路

TL594是TI德州仪器公司的一款PWM与谐振控制器产品，TL594是脉宽调制 (PWM) 控制电路，本站介绍了TL594的封装应用图解、特点和优点、功能等，并给出了与TL594相关的TI元器件型号供参考。

TL594 - 脉宽调制 (PWM) 控制电路 - PWM与谐振控制器 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品描述

The TL594 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 systems engineer the flexibility to tailor the power-supply control circuitry to a specific application.

The TL594 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 regulator with a precision of 1%, an undervoltage lockout control circuit, and output control circuitry.

The error amplifiers have a common-mode voltage range of –0.3V to VCC–2V. The DTC 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 be used to drive the common circuitry in synchronous multiple-rail power supplies.

The uncommitted output transistors provide either common-emitter or emitter-follower output capability. Each device provides for push-pull or single-ended output operation, with selection by means of the output-control function. The architecture of these devices prohibits the possibility of either output being pulsed twice during push-pull operation. The undervoltage lockout control circuit locks the outputs off until the internal circuitry is operational.

The TL594C device is characterized for operation from 0°C to 70°C. The TL594I device is characterized for operation from –40°C to 85°C.

产品特性

  • 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 Trimmed to 1%
  • Circuit Architecture Allows Easy Synchronization
  • Undervoltage Lockout for Low-VCC Conditions

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