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AC/DC controllers

LM5020

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13V 至 100V 宽输入电压、电流模式 PWM 升压、反激式、Sepic 控制器

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LM5020

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产品详情

Topology Boost, Flyback, Forward, SEPIC Control mode current mode Features Enable, Frequency synchronization, Nonsynchronous rectification, Pre-Bias Start-Up Duty cycle (max) (%) 80
Topology Boost, Flyback, Forward, SEPIC Control mode current mode Features Enable, Frequency synchronization, Nonsynchronous rectification, Pre-Bias Start-Up Duty cycle (max) (%) 80
VSSOP (DGS) 10 14.7 mm² 3 x 4.9 WSON (DPR) 10 16 mm² 4 x 4
  • Internal Start-up Bias Regulator
  • Error Amplifier
  • Precision Voltage Reference
  • Programmable Softstart
  • 1A Peak Gate Driver
  • Maximum Duty Cycle Limiting (80% for LM5020-1 or 50% for LM5020-2)
  • Programmable Line Under Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Cycle-by-Cycle Over-Current Protection
  • Slope Compensation (LM5020-1)
  • Programmable Oscillator Frequency with Synchronization Capability
  • Current Sense Leading Edge Blanking
  • Thermal Shutdown Protection
  • Internal Start-up Bias Regulator
  • Error Amplifier
  • Precision Voltage Reference
  • Programmable Softstart
  • 1A Peak Gate Driver
  • Maximum Duty Cycle Limiting (80% for LM5020-1 or 50% for LM5020-2)
  • Programmable Line Under Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Cycle-by-Cycle Over-Current Protection
  • Slope Compensation (LM5020-1)
  • Programmable Oscillator Frequency with Synchronization Capability
  • Current Sense Leading Edge Blanking
  • Thermal Shutdown Protection

The LM5020 high voltage pulse-width-modulation (PWM) controller contains all of the features needed to implement single ended primary power converter topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation while providing inherent line feed-forward. The LM5020 includes a high-voltage start-up regulator that operates over a wide input range up to 100V. The PWM controller is designed for high speed capability including an oscillator frequency range to 1MHz and total propagation delays less than 100ns. Additional features include an error amplifier, precision reference, line under-voltage lockout, cycle-by-cycle current limit, slope compensation, softstart, oscillator synchronization capability and thermal shutdown. The controller is available in both MSOP-10 and LLP-10 packages.

The LM5020 high voltage pulse-width-modulation (PWM) controller contains all of the features needed to implement single ended primary power converter topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation while providing inherent line feed-forward. The LM5020 includes a high-voltage start-up regulator that operates over a wide input range up to 100V. The PWM controller is designed for high speed capability including an oscillator frequency range to 1MHz and total propagation delays less than 100ns. Additional features include an error amplifier, precision reference, line under-voltage lockout, cycle-by-cycle current limit, slope compensation, softstart, oscillator synchronization capability and thermal shutdown. The controller is available in both MSOP-10 and LLP-10 packages.
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技术文档

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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 LM5020 100V Current Mode PWM Controller 数据表 (Rev. F) 2006年 4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
技术文章 Flyback converters: two outputs are better than one PDF | HTML 2016年 11月 24日
技术文章 What is behind isolated DC/DC converter voltage regulation? PDF | HTML 2015年 8月 31日
用户指南 Dual Output Isolated Flyback Design:User Guide 2012年 1月 27日
应用手册 An Alternative Approach to Higher-Power Boost Converters 2009年 11月 30日
白皮书 PWM DC-DC Cntrllrs w/Built-In Strt-Up Regs Simp Switch Pwr Supply Design 2005年 10月 1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

LM5020EVAL — 100V 电流模式 PWM 控制器反向评估板

100V Current Mode PWM Controller Flyback Evaluation Board

用户指南: PDF
TI.com 上无现货
评估板

PSEMTHR24EVM-081 — 适用于 24 端口 IEEE 802.3bt 就绪型 PSE 系统的主板

PSEMTHR24EVM-081 是 TPS23881 和 TPS23882 PSE 控制器的基板。该基板包含 24 个 2 线对/4 线对端口，可用于发送高达 30W/端口（对于 IEEE 802.3at 应用）和 90W/端口（对于 IEEE 802.3bt 应用）的功率。

TI.com 上无现货
仿真模型

LM5020 Unencrypted PSpice Transient Model

SNVM011.ZIP (579 KB) - PSpice Model
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CAD/CAE 符号

Dual Output Isolated Flyback Design CAD File

SNVC008.PDF (65 KB)
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计算工具

FLYBUCK-FLYBACK-DESIGN-CALC — Flybuck / Flyback Calculator

This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.

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许多 TI 参考设计都包括 LM5020

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封装 引脚 CAD 符号、封装和 3D 模型
VSSOP (DGS) 10 Ultra Librarian
WSON (DPR) 10 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

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