LT1248是Power Factor Controller - LINEAR(凌力尔特)

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LT1248 - LT1248是Power Factor Controller

LT1248是Linear公司的一款离线式控制器 / PFC产品，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相关的凌力尔特元器件型号供参考。

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