菜单

关闭

LT3837

隔离型无光隔离器同步反激式控制器

英文数据手册

量产

顶部

概览

优势和特点
产品详情

优势和特点

直接从主端绕组检测输出电压 —— 无需光隔离器
同步驱动器用于实现高效率
电源电压范围：4.5V 至 20V
准确的调节而无需用户修整
可编程开关频率范围：50kHz 至 250kHz
可同步
负载补偿
欠压闭锁
采用耐热增强型 16 引脚 TSSOP 封装

产品详情

LT^®3837 是一款隔离型开关稳压控制器，专为中等功率反激式拓扑结构而设计。一种典型应用是 10W 至 60W，该器件从一个 DC 电源来供电。

LT3837 是电流模式控制器，通过在反激期间利用一个变压器绕组来检测副端电压，它可调节一个输出电压。这使得能够在不采用光隔离器的情况下实现严格的输出调节，从而改善了动态响应和可靠性。同步整流提高了转换器效率，并改善了多输出转换器中的输出交叉调整率。

LT3837 工作于强制连续导通模式，该模式改善了多绕组应用中的交叉调整率。开关频率可由用户来设置，并能够在外部进行同步。该器件还具有负载补偿、欠压闭锁和软起动电路。

LT3837 采用耐热增强型 16 引脚 TSSOP 封装。

应用

隔离型中等功率 (10W 至 60W) 电源
仪表电源
隔离型医用电源

产品分类

电源管理
- 反激、正向和隔离式控制器

类似器件点击在参数搜索中查看所有

产品生命周期量产

该产品系列中至少有一个型号已量产并可供采购。该产品适合用于新设计，但也可能有更新的替代产品。

评估套件 (4)

DC950A-B

LT3837EFE Demo Board | 9V ≤ V_IN ≤ 36V, V_OUT: 5V/2A, 3.3V/3A, 2.5V/3A

DC1038A-B

LT3837EFE | 9V to 36V input to 5V at 7A Synchronous Flyback Converter

DC1038A-C

LT3837EFE | 9V to 36V input to 12V at 3A Synchronous Flyback Converter

DC1038A-A

LT3837EFE | 9V to 36V input to 3.3V at 10A Synchronous Flyback Converter

DC950A-B

查看此评估套件详细信息

Demonstration circuit 950A-B is an isolated, 30W multi-output, synchronous flyback converter in 1/8 brick format featuring the LT3837. Output voltage sensing is implemented without the use of opto-coupler, by sensing the voltage across a primary side auxiliary winding. A load compensation circuit is used to compensate for voltage drops caused by load currents. DC950A-B has input voltage range 9V-36V. Demonstration circuit 950A uses a transformer design with tapped secondary winding, to achieve higher efficiency and better cross regulation than is possible with a transformer that uses a separate winding for each output.

DC1038A-B

查看此评估套件详细信息

Demonstration circuit 1038A-B is a 35W isolated flyback converter with synchronous rectification and primary-side regulation featuring the LT3837. This circuit was designed to demonstrate the high levels of performance, efficiency, and small solution size attainable using the part in a flyback power supply. It operates at 200kHz and produces a regulated 5V, 7A output from an input voltage range of 9V to 36V. Isolation voltage is 1500VDC.

DC1038A-C

查看此评估套件详细信息

Demonstration circuit 1038A-C is a 36W isolated flyback converter with synchronous rectification and primary-side regulation featuring the LT3837. This circuit was designed to demonstrate the high levels of performance, efficiency, and small solution size attainable using the part in a flyback power supply. It operates at 200kHz and produces a regulated 12V, 3A output from an input voltage range of 9V to 36V. Isolation voltage is 1500VDC.

DC1038A-A

查看此评估套件详细信息

Demonstration circuit 1038A-A is a 33W isolated flyback converter with synchronous rectification and primary-side regulation featuring the LT3837. This circuit was designed to demonstrate the high levels of performance, efficiency, and small solution size attainable using the part in a flyback power supply. It operates at 200kHz and produces a regulated 3.3V, 10A output from an input voltage range of 9V to 36V. Isolation voltage is 1500VDC.