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UC2846-电流模式 PWM 控制器
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TI产品 - UC2846介绍
UC2846 - 电流模式 PWM 控制器

UC2846是TI公司的一款PWM与谐振控制器产品,UC2846是电流模式 PWM 控制器,本页介绍了UC2846的产品说明、应用、特性等,并给出了与UC2846相关的TI元器件型号供参考。

UC2846 - 电流模式 PWM 控制器 - PWM与谐振控制器 - 离线隔离型DC/DC控制器和转换器 - TI公司(Texas Instruments,德州仪器)

产品描述

The UC1846/7 family of control ICs provides all of the necessary features to implement fixed frequency, current mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel "power modules" while maintaining equal current sharing.

Protection circuitry includes built-in under-voltage lockout and programmable current limit in addition to soft start capability. A shut-down function is also available which can initiate either a complete shutdown with automatic restart or latch the supply off.

Other features include fully latched operation, double pulse suppression, deadline adjust capability, and a ±1% trimmed bandgap reference.

The UC1846 features low outputs in the OFF state, while the UC1847 features high outputs in the OFF state.

产品特性

  • Automatic Feed Forward Compensation
  • Programmable Pulse-by-Pulse Current Limiting
  • Automatic Symmetry Correction in Push-pull Configuration
  • Enhanced Load Response Characteristics
  • Parallel Operation Capability for Modular Power Systems
  • Differential Current Sense Amplifier with Wide Common Mode Range
  • Double Pulse Suppression
  • 500mA (Peak) Totem-pole Outputs
  • ±1% Bandgap Reference
  • Under-voltage Lockout
  • Soft Start Capability
  • Shutdown Terminal
  • 500kHZ Operation

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