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LT1248 - 典型应用图例：
LT1248典型应用图例一
LT1248 - 封装图解：
LT1248封装图解一
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LINEAR产品 - LT1248介绍

LT1248 - LT1248是Power Factor Controller

LT1248是LINEAR凌力尔特公司的一款离线式控制器 / PFC产品，LT1248是LT1248是Power Factor Controller，本站介绍了LT1248的封装应用图解、特点和优点、功能等，并给出了与LT1248相关的LINEAR元器件型号供参考。

LT1248 - LT1248是Power Factor Controller - 离线式控制器 / PFC - 电源管理 - 凌力尔特

LT1248 - Power Factor Controller

LT1248 - Power Factor Controller - Linear Technology（凌力尔特）

功能描述
The LT1248 provides active power factor correction for universal off-line power systems. By using fixed high frequency PWM current averaging, without the need for slope compensation, the LT1248 achieves far lower line current distortion with a smaller magnetic element than systems that use either peak-current detection or zero current switching approaches in both continuous and discontinuous modes of operation. The LT1248 uses a multiplier containing a square gain function from the voltage amplifier to reduce the AC gain at light output load and thus maintains low line current distortion and high system stability. The LT1248 also provides filtering capability to reject line switching noise which can cause instability when fed into the multiplier. Line current dead zone is minimized with low bias voltage at the current input to the multiplier. The LT1248 provides many protection features including peak current limiting and overvoltage protection, and can be operated at frequencies as high as 300kHz.
特点
  • High Power Factor Over Wide Load Range with Line Current Averaging
  • International Operation Without Switches
  • Instantaneous Overvoltage Protection
  • Minimal Line Current Dead Zone
  • Typical 250µA Start-Up Supply Current
  • Rejects Line Switching Noise
  • Synchronization Capability
  • Low Quiescent Current: 9mA
  • Fast 1.5A Peak Current Gate Driver
    • 应用
  • Universal Power Factor Corrected Power Supplies
  • Preregulators Up To 1500W
    • 以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
    器件型号 封装 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量)
    LT1248CN N-16 C $4.58 $3.60
    LT1248CN#PBF N-16 C $4.58 $3.60
    LT1248CS SO-16 C $4.92 $3.85
    LT1248CS#PBF SO-16 C $4.92 $3.85
    LT1248CS#TR SO-16 C $3.91
    LT1248CS#TRPBF SO-16 C $3.91
    LT1248IN N-16 I $5.25 $4.15
    LT1248IN#PBF N-16 I $5.25 $4.15
    LT1248IS SO-16 I $5.75 $4.55
    LT1248IS#PBF SO-16 I $5.75 $4.55
    LT1248IS#TR SO-16 I $4.61
    LT1248IS#TRPBF SO-16 I $4.61
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  • LT3799 - 具备有源 PFC 功能的离线隔离型反激式 LED 驱动器
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  • LT4363 - 具电流限制功能的高电压浪涌抑制器
  • LT3748 - 100V 隔离型反激式控制器
  • LT3758 - 高输入电压、升压、反激式、SEPIC 和负输出控制器
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