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LT1737 - 典型应用图例：
LT1737典型应用图例一
LT1737 - 封装图解：
LT1737封装图解一
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LINEAR产品 - LT1737介绍

LT1737 - LT1737是High Power Isolated Flyback Controller

LT1737是LINEAR凌力尔特公司的一款反激式、正激式和隔离式控制器产品，LT1737是LT1737是High Power Isolated Flyback Controller，本站介绍了LT1737的封装应用图解、特点和优点、功能等，并给出了与LT1737相关的LINEAR元器件型号供参考。

LT1737 - LT1737是High Power Isolated Flyback Controller - 反激式、正激式和隔离式控制器 - 电源管理 - 凌力尔特

LT1737 - High Power Isolated Flyback Controller

LT1737 - High Power Isolated Flyback Controller - Linear Technology（凌力尔特）

功能描述

The LT1737 is a monolithic switching regulator controller specifically designed for the isolated flyback topology. It drives the gate of an external MOSFET and is generally powered from a DC supply voltage. Output voltage feedback information may be supplied by a variety of methods including a third transformer winding, the primary winding or even direct DC feedback (see Applications Information). Its gate drive capability coupled with a suitable external MOSFET and other power path components can deliver load power up to tens of Watts.

The LT1737 has a number of features not found on other isolated flyback controller ICs presently available. By utilizing current mode switching techniques, it provides excellent AC and DC line regulation. Its unique control circuitry can maintain regulation well into discontinuous mode in most applications. Optional load compensation circuitry allows for improved load regulation. An optional undervoltage lockout pin halts operation when the application input voltage is too low. An optional external capacitor implements a soft-start function.

特点
  • Drives External Power MOSFET
  • Supply Voltage Range: 4.5V to 20V
  • Flyback Voltage Limited Only by External Components
  • Senses Output Voltage Directly from Primary Side Winding—No Optoisolator Required
  • Moderate Accuracy Regulation Without User Trims
  • Regulation Maintained Well into Discontinuous Mode
  • Switching Frequency from 50kHz to 250kHz with External Capacitor
  • Available in 16-Pin GN and SO Packages
  • Optional Load Compensation
  • Optional Undervoltage Lockout
  • External ISENSE Resistor
  • Shutdown Feature Reduces IQ to 50µA Typ
    • 应用
  • Isolated Flyback Switching Regulators
  • Medical Instruments
  • Instrumentation Power 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)
    LT1737CGN SSOP-16 C $3.55 $3.00
    LT1737CGN#PBF SSOP-16 C $3.55 $3.00
    LT1737CGN#TR SSOP-16 C $3.06
    LT1737CGN#TRPBF SSOP-16 C $3.06
    LT1737CS SO-16 C $3.43 $2.90
    LT1737CS#PBF SO-16 C $3.43 $2.90
    LT1737CS#TR SO-16 C $2.96
    LT1737CS#TRPBF SO-16 C $2.96
    LT1737IGN SSOP-16 I $4.14 $3.50
    LT1737IGN#PBF SSOP-16 I $4.14 $3.50
    LT1737IGN#TR SSOP-16 I $3.56
    LT1737IGN#TRPBF SSOP-16 I $3.56
    LT1737IS SO-16 I $4.03 $3.40
    LT1737IS#PBF SO-16 I $4.03 $3.40
    LT1737IS#TR SO-16 I $3.46
    LT1737IS#TRPBF SO-16 I $3.46
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  • LT1725 - General Purpose Isolated Flyback Controller
  • LT3575 - 无需使用光耦合器的隔离型反激式转换器
  • LT3798 - 具备有源 PFC 功能的隔离型 No Opto 耦合器反激式控制器
  • LT1425 - Isolated Flyback Switching Regulators
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