LT1425是Isolated Flyback Switching Regulators

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LT1425 - LT1425是Isolated Flyback Switching Regulators

LT1425是Linear公司的一款反激式、正激式和隔离式控制器产品，LT1425是Isolated Flyback Switching Regulators，本站介绍了LT1425的封装应用图解、特点和优点、功能等，并给出了与LT1425相关的凌力尔特元器件型号供参考。

LT1425 - Isolated Flyback Switching Regulators

LT1425 - Isolated Flyback Switching Regulators - Linear Technology（凌力尔特）

功能描述

The LT1425 is a monolithic high power switching regulator specifically designed for the isolated flyback topology. No “third winding” or optoisolator is required; the integrated circuit senses the isolated output voltage directly from the primary side flyback waveform. A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry. The LT1425 operates with input supply voltages from 3V to 20V and draws only 7mA quiescent current. It can deliver output power up to 6W with no external power devices. By utilizing current mode switching techniques, it provides excellent AC and DC line regulation. The LT1425 has a number of features not found on other switching regulator ICs. Its unique control circuitry can maintain regulation well into discontinuous mode in most applications. Optional load compensation circuitry allows for improved load regulation. An externally activated shutdown mode reduces total supply current to 15µA for standby operation.

特点

No Transformer

±5% Accurate Output Voltage Without User Trims (See Circuit Below)

Resistor Programmable Output Voltage

Regulation Maintained Well Into Discontinuous Mode (Light Load)

Optional Load Compensation

Operating Frequency: 285kHz

Easily Synchronized to External Clock

Available in 16-Pin Narrow SO Package

应用

Isolated Flyback Switching Regulators

Ethernet Isolated 5V to -9V Converter

Medical Instruments

Isolated Telecom Supplies

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)
LT1425CS	SO-16	C	$3.55	$2.90
LT1425CS#PBF	SO-16	C	$3.55	$2.90
LT1425CS#TR	SO-16	C		$2.96
LT1425CS#TRPBF	SO-16	C		$2.96
LT1425IS	SO-16	I	$4.90	$3.95
LT1425IS#PBF	SO-16	I	$4.90	$3.95
LT1425IS#TR	SO-16	I		$4.01
LT1425IS#TRPBF	SO-16	I		$4.01