LT1952
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LT1952

单开关同步正激控制器

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Info: : 量产 tooltip
Info: : 量产 tooltip
产品详情
产品模型 12
特性
  • 实现高效率的同步整流器控制
  • 可编程伏特-秒箝位
  • 25W 至 500W 的输出功率电平
  • 低电流启动 
         (LT1952 = 460uA;VIN 接通 / 关断 = 14.25V / 8.75V) 
         (LT1952-1 = 400uA;VIN 接通 / 关断 = 7.75V / 6.5V)
  • 真正的 PWM 软起动
  • 低应力短路保护
  • 精准的 107mV 电流限制门限
  • 用于同步定时的可调延迟
  • 具有可编程迟滞的精确停机门限
  • 可编程斜率补偿
  • 可编程脉冲前沿消隐
  • 可编程频率 (100kHz 至 500kHz)
  • 可同步至一个频率高达 1.5 • fOSC 的外部时钟
  • 内部 1.23V 基准
  • 2.5V 外部基准
  • 电流模式控制
  • 小外形 16 引脚 SSOP 封装

 

更多细节
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LT®1952 / LT1952-1是一款专为控制正激变换器拓扑结构而优化设计的电流模式 PWM 控制器,采用一个主 MOSFET。LT1952 / LT1952-1可提供同步整流器控制,因此得到了极高的效率。一个可编程伏特-秒箝位为用于防止变压器发生饱和的变压器复位提供了安全保障。这使得主端上的 MOSFET 能够以大于 50% 的占空比可靠地运行,以实现高 MOSFET、变压器和整流器利用率。LT1952 具有软起动功能,旨在以受控的方式从停机和欠压闭锁状态退出。与占空比无关的精准 107mV 电流限制门限和软起动功能相组合,以提供“打嗝”短路保护。微功率启动使得 LT1952 能够在高输入电压情况下优化。LT1952-1 允许从较低的输入电压启动。可编程斜率补偿和前沿消隐允许采用多种电感器和 MOSFET 来对环路带宽实施优化。可以在 100kHz 至 500kHz 的频率范围内对每个器件进行编程工作,而且,器件可同步至一个外部时钟。误差放大器是一个真正的运算放大器,因而可采用各种补偿网络。LT1952 / LT1952-1 采用小外形 16 引脚 SSOP 封装。



Applications

  • 电信电源
  • 工业和分布式电源
  • 隔离型和非隔离型 DC/DC 转换器

 

产品模型 12

产品技术资料帮助

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ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许,也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。

参考资料

参考资料

产品型号 引脚/封装图-中文版 文档 CAD 符号,脚注和 3D模型
LT1952EGN#PBF
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LT1952EGN-1#PBF
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LT1952EGN-1#TRPBF
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LT1952IGN#PBF
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LT1952IGN#TRPBF
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LT1952IGN-1#PBF
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LT1952IGN-1#TRPBF
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LT1952MPGN#PBF
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LT1952MPGN-1#PBF
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根据型号筛选

reset

重置过滤器

产品型号

产品生命周期

PCN

10月 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

LT1952EGN#PBF

量产

LT1952EGN#TRPBF

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LT1952EGN-1#PBF

量产

LT1952EGN-1#TRPBF

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LT1952IGN#PBF

量产

LT1952IGN#TRPBF

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LT1952IGN-1#PBF

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LT1952IGN-1#TRPBF

量产

LT1952MPGN#PBF

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LT1952MPGN#TRPBF

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LT1952MPGN-1#PBF

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LT1952MPGN-1#TRPBF

量产

4月 6, 2022

- 22_0066

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LT1952EGN#PBF

量产

LT1952EGN#TRPBF

量产

LT1952EGN-1#PBF

量产

LT1952EGN-1#TRPBF

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LT1952IGN#PBF

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LT1952IGN#TRPBF

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LT1952IGN-1#PBF

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LT1952IGN-1#TRPBF

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LT1952MPGN#PBF

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LT1952MPGN#TRPBF

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LT1952MPGN-1#PBF

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LT1952MPGN-1#TRPBF

量产

根据型号筛选

reset

重置过滤器

产品型号

产品生命周期

PCN

10月 11, 2022

- 22_0235

arrow down

Epoxy Change from Henkel 8290 to 8290A for GN Package

LT1952EGN#PBF

量产

LT1952EGN#TRPBF

量产

LT1952EGN-1#PBF

量产

LT1952EGN-1#TRPBF

量产

LT1952IGN#PBF

量产

LT1952IGN#TRPBF

量产

LT1952IGN-1#PBF

量产

LT1952IGN-1#TRPBF

量产

LT1952MPGN#PBF

量产

LT1952MPGN#TRPBF

量产

LT1952MPGN-1#PBF

量产

LT1952MPGN-1#TRPBF

量产

4月 6, 2022

- 22_0066

arrow down

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LT1952EGN#PBF

量产

LT1952EGN#TRPBF

量产

LT1952EGN-1#PBF

量产

LT1952EGN-1#TRPBF

量产

LT1952IGN#PBF

量产

LT1952IGN#TRPBF

量产

LT1952IGN-1#PBF

量产

LT1952IGN-1#TRPBF

量产

LT1952MPGN#PBF

量产

LT1952MPGN#TRPBF

量产

LT1952MPGN-1#PBF

量产

LT1952MPGN-1#TRPBF

量产

软件和型号相关生态系统

软件和型号相关生态系统

评估套件

评估套件 14

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DC1317A-E

LT1952EGN-1 Active Reset Demo Board | VIN=18V-72V VOUT=5V @ 12A

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DC1317A-C

LT1952EGN-1/LTC3900 Demo Board | Active Reset, VIN=18V-72V VOUT=12V @ 10A

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DC1317A-C

LT1952EGN-1/LTC3900 Demo Board | Active Reset, VIN=18V-72V VOUT=12V @ 10A

LT1952EGN-1/LTC3900 Demo Board | Active Reset, VIN=18V-72V VOUT=12V @ 10A

产品详情

Demonstration circuit 1317A-C is isolated input to high current output 1/8th brick footprint synchronous forward converter featuring the LT1952 switching controller with Active Reset circuit. The Active Reset circuit can improve the efficiency in wide input voltage applications. Also, the Active Reset allows the implementation of self-driven synchronous secondary rectifiers in some applications. The DC1317A-C converts isolated 18V to 72V input to 12V output and provides over 12A of output current depending on cooling.

When determining the cooling requirements the actual input voltage range and continuous maximum output current must be taken into account. The converter operates at 300kHz with the peak efficiency greater than 94%. The DC1317 can be easily modified to generate output voltages in the range from 0.6V to 48V. The output currents are limited by total output power of up to 150W.
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DC1317A-F

LT1952EGN-1 Active Reset Demo Board | VIN=9V-36V VOUT=3.3 @ 22A

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DC759A

LT1952EGN、LTC1698EGN | 48VIN至5V、20A转换器,+VIN = 36V – 72V,+VOUT = +5V(20A时)

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DC1317A-G

LT1952EGN-1/LTC3900 Demo Board | Active Reset, VIN=9V-36V VOUT=12V @ 5A

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DC1317A-G

LT1952EGN-1/LTC3900 Demo Board | Active Reset, VIN=9V-36V VOUT=12V @ 5A

LT1952EGN-1/LTC3900 Demo Board | Active Reset, VIN=9V-36V VOUT=12V @ 5A

产品详情

Demonstration circuit 1317A-G is an isolated input to high current output 1/8th brick footprint synchronous forward converter featuring the LT1952 switching controller with Active Reset circuit. The Active Reset circuit can improve the efficiency in wide input voltage applications. Also, the Active Reset allows the implementation of self-driven synchronous secondary rectifiers in some applications. The DC1317A-G converts an isolated 9V to 36V input to 12V at 5A of output current.


 


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DC1317A-H

LT1952-1 Isolated Demo Board | Sync Forward Controller, Active Reset, 9V ≤ VIN ≤ 36V, 48V @1.5A

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DC1317A-H

LT1952-1 Isolated Demo Board | Sync Forward Controller, Active Reset, 9V ≤ VIN ≤ 36V, 48V @1.5A

LT1952-1 Isolated Demo Board | Sync Forward Controller, Active Reset, 9V ≤ VIN ≤ 36V, 48V @1.5A

产品详情

Demonstration circuit 1317A-H is isolated input to high current output 1/8th Brick footprint converter featuring the LT1952 switching controller with Active Reset circuit. The Active Reset circuit can improve the efficiency in wide input voltage applications. Also, the Active Reset allows the implementation of self-driven synchronous secondary rectifiers in some applications. The DC1317A-H converts isolated 9V to 36V input to 48V output and provides 1.5A of output current.

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DC1317A-D

LT1952EGN-1 Active Reset Demo Board | VIN=18V-72V VOUT=24V @ 5A

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DC968A-B

LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 18V-36V, VOUT = 5V @ 20A

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DC968A-B

LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 18V-36V, VOUT = 5V @ 20A

LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 18V-36V, VOUT = 5V @ 20A

产品详情

DC968A-B Demo Board for:
LT1952 Single Switch Synchronous Forward Controller
LTC3900 Synchronous Rectifier Driver for Forward Converters
LT4430 Secondary-Side Optocoupler Driver

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DC968A-C

OBSOLETE: LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 36V-75V, VOUT = 12V @ 12A

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DC968A-C

OBSOLETE: LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 36V-75V, VOUT = 12V @ 12A

OBSOLETE: LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 36V-75V, VOUT = 12V @ 12A

产品详情

This evaluation board is obsolete and no longer recommended. The replacement board is the DC1317A-C.

DC968A-C Demo Board for:
LT1952 Single Switch Synchronous Forward Controller
LTC3900 Synchronous Rectifier Driver for Forward Converters
LT4430 Secondary-Side Optocoupler Driver

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DC968A-A

LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 34V-75V VOUT = 3.3V @ 30A

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DC968A-A

LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 34V-75V VOUT = 3.3V @ 30A

LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 34V-75V VOUT = 3.3V @ 30A

产品详情

DC968A-A Demo Board for:
LT1952 Single Switch Synchronous Forward Controller
LTC3900 Synchronous Rectifier Driver for Forward Converters
LT4430 Secondary-Side Optocoupler Driver


 


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DC968A-D

LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 36V-75V, VOUT = 28V @ 4A

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DC968A-D

LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 36V-75V, VOUT = 28V @ 4A

LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | VIN = 36V-75V, VOUT = 28V @ 4A

产品详情

DC968A-D Demo Board for:
LT1952 Single Switch Synchronous Forward Controller
LTC3900 Synchronous Rectifier Driver for Forward Converters
LT4430 Secondary-Side Optocoupler Driver

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DC830A

LT1952EGN-1 | 48VIN至3.3V、40A隔离式Quarter Brick Telecom DC/DC转换器

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DC1317A-A

LT1952EGN-1 Active Reset Demo Board | VIN = 34V - 75V VOUT = 3.3V @ 35A

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DC1317A-B

LT1952EGN-1 Active Reset Demo Board | VIN = 18V-72V VOUT = 5V @ 25A

工具和仿真

工具及仿真模型 1

LTspice®是一款强大高效的免费仿真软件、原理图采集和波形观测器,为改善模拟电路的仿真提供增强功能和模型。

启动此部分的现成LTspice演示电路:

1步:下载并在计算机上安装LTspice

2步:单击下面的链接,下载演示电路。

3步:如果在单击以下链接之后LTspice未自动打开,可通过右击该链接并选择“目标另存为”来运行该仿真。将文件保存到计算机之后,请启动LTspice并从“文件”菜单中选择“打开”来打开演示电路。

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