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LM5025-有源钳位电压模式 PWM 控制器
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TI产品 - LM5025介绍

LM5025 - 有源钳位电压模式 PWM 控制器

LM5025是TI德州仪器公司的一款PWM与谐振控制器产品，LM5025是有源钳位电压模式 PWM 控制器，本站介绍了LM5025的封装应用图解、特点和优点、功能等，并给出了与LM5025相关的TI元器件型号供参考。

LM5025 - 有源钳位电压模式 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 - 德州仪器

产品描述

The LM5025 PWM controller contains all of the features necessary to implement power converters utilizing the Active Clamp / Reset technique. The device can be configured to control either a P-Channel clamp switch or an N-Channel clamp switch. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp / reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B). The active clamp output can be configured for either a specified overlap time (for P-Channel switch applications) or a specified deadtime (for N_Channel applications). The two internal compound gate drivers parallel both MOS and Bipolar devices, providing superior gate drive characteristics. This controller is designed for high-speed operation including an oscillator frequency range up to 1MHz and total PWM and current sense propagation delays less than 100ns. The LM5025 includes a high-voltage start-up regulator that operates over a wide input range of 13V to 90V. Additional features include: Line Under Voltage Lockout (UVLO), softstart, oscillator UP/DOWN sync capability, precision reference and thermal shutdown.

产品特性

  • Internal Start-up Bias Regulator
  • 3A Compound Main Gate Driver
  • Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Voltage Mode Control with Feed-Forward
  • Adjustable Dual Mode Over-Current Protection
  • Programmable Overlap or Deadtime between the Main and Active Clamp Outputs
  • Volt x Second Clamp
  • Programmable Soft-start
  • Leading Edge Blanking
  • Single Resistor Programmable Oscillator
  • Oscillator UP / DOWN Sync Capability
  • Precision 5V Reference
  • Thermal Shutdown

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