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LM5045

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具有集成 MOSFET 驱动器的全桥接 PWM 控制器

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LM5045

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产品详情

Topology Full bridge, Half bridge, Push pull Control mode Current Features Current limiting, High-voltage startup, Integrated gate drivers, Multi-topology, SR logic, Synchronization pin Duty cycle (max) (%) 50 Sector Test & measurement
Topology Full bridge, Half bridge, Push pull Control mode Current Features Current limiting, High-voltage startup, Integrated gate drivers, Multi-topology, SR logic, Synchronization pin Duty cycle (max) (%) 50 Sector Test & measurement
HTSSOP (PWP) 28 62.08 mm² 9.7 x 6.4 WQFN (RSG) 28 25 mm² 5 x 5
  • Highest Integration Controller for Small Form Factor, High-Density Power Converters
  • High-Voltage Start-Up Regulator
  • Intelligent Sync Rectifier Start-Up Allows Linear Turnon Into Prebiased Loads
  • Synchronous Rectifiers Disabled in UVLO mode and Hiccup Mode
  • Two Independent, Programmable Synchronous Rectifier Dead-Time Adjustments
  • Four High-Current 2A Bridge Gate Drivers
  • Wide-Bandwidth Optocoupler Interface
  • Configurable for Either Current Mode or Voltage Mode Control
  • Dual-Mode Overcurrent Protection
  • Resistor Programmed 2MHz Oscillator
  • Programmable Line UVLO and OVP
  • Highest Integration Controller for Small Form Factor, High-Density Power Converters
  • High-Voltage Start-Up Regulator
  • Intelligent Sync Rectifier Start-Up Allows Linear Turnon Into Prebiased Loads
  • Synchronous Rectifiers Disabled in UVLO mode and Hiccup Mode
  • Two Independent, Programmable Synchronous Rectifier Dead-Time Adjustments
  • Four High-Current 2A Bridge Gate Drivers
  • Wide-Bandwidth Optocoupler Interface
  • Configurable for Either Current Mode or Voltage Mode Control
  • Dual-Mode Overcurrent Protection
  • Resistor Programmed 2MHz Oscillator
  • Programmable Line UVLO and OVP

The LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100V. This highly integrated controller-driver provides dual 2A high-side and low-side gate drivers for the four external bridge MOSFETs plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2MHz capable oscillator with synchronization capability and thermal shutdown.

The LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100V. This highly integrated controller-driver provides dual 2A high-side and low-side gate drivers for the four external bridge MOSFETs plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2MHz capable oscillator with synchronization capability and thermal shutdown.
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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 LM5045 Full-Bridge PWM Controller With Integrated MOSFET Drivers 数据表 (Rev. I) PDF | HTML 2026年 5月 14日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
用户指南 AN-2111 LM5045 Evaluation Board (Rev. C) 2013年 5月 6日
应用手册 AN-2213 LM5045 Based 240W Power Converter Using Full-Wave (Rev. A) 2013年 5月 6日
应用手册 Applying I2C-Compatible Temperature Sensors in Systems With Slow Clock Edges (Rev. A) 2013年 5月 6日

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

LM5045EVAL — 用于 LM5045 的评估板

LM5045 评估模块旨在为设计工程师提供采用全桥拓扑、功能齐全的电源转换器，用于评估 LM5045 PWM 控制器。该评估板采用业界通用的四分之一砖型封装。
TI.com 上无现货
仿真模型

LM5045 PSPICE Model

SNVM006.ZIP (350 KB) - PSpice Model
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计算工具

SLUC501 — LM5045 Design Calculator

支持的产品和硬件

支持的产品和硬件
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参考设计

PMP31092 — 薄型 140W 全桥参考设计

此电源是一款 140W 全桥参考设计，适用于由于平面变压器而需要高密度和低元件高度的应用。该设计基于硬开关全桥拓扑，在次级侧使用肖特基二极管，并由 LM5045 驱动。平面变压器用于更大限度地减小尺寸和高度。印刷电路板 (PCB) 有六层，元件从上到下进行组装。该单元专为在环境温度 (TA) < 40°C 时在额定负载下持续运行而设计。对于较高的环境温度，建议最小空气流量为 200 线性英尺/分钟 (LFM)。
测试报告: PDF
封装 引脚 CAD 符号、封装和 3D 模型
HTSSOP (PWP) 28 Ultra Librarian
WQFN (RSG) 28 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。

支持和培训

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