ZHCSA24H February 2013 – June 2017 LM5122
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Undervoltage Lockout (UVLO)
- 7.3.2 High Voltage VCC Regulator
- 7.3.3 Oscillator
- 7.3.4 Slope Compensation
- 7.3.5 Error Amplifier
- 7.3.6 PWM Comparator
- 7.3.7 Soft-Start
- 7.3.8 HO and LO Drivers
- 7.3.9 Bypass Operation (VOUT = VIN)
- 7.3.10 Cycle-by-Cycle Current Limit
- 7.3.11 Clock Synchronization
- 7.3.12 Maximum Duty Cycle
- 7.3.13 Thermal Protection
- 7.4 Device Functional Modes
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8 Application and Implementation
- 8.1
Application Information
- 8.1.1 Feedback Compensation
- 8.1.2 Sub-Harmonic Oscillation
- 8.1.3 Interleaved Boost Configuration
- 8.1.4 DCR Sensing
- 8.1.5 Output Overvoltage Protection
- 8.1.6 SEPIC Converter Simplified Schematic
- 8.1.7 Non-Isolated Synchronous Flyback Converter Simplified Schematic
- 8.1.8 Negative to Positive Conversion
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Custom Design With WEBENCH® Tools
- 8.2.2.2 Timing Resistor RT
- 8.2.2.3 UVLO Divider RUV2, RUV1
- 8.2.2.4 Input Inductor LIN
- 8.2.2.5 Current Sense Resistor RS
- 8.2.2.6 Current Sense Filter RCSFP, RCSFN, CCS
- 8.2.2.7 Slope Compensation Resistor RSLOPE
- 8.2.2.8 Output Capacitor COUT
- 8.2.2.9 Input Capacitor CIN
- 8.2.2.10 VIN Filter RVIN, CVIN
- 8.2.2.11 Bootstrap Capacitor CBST and Boost Diode DBST
- 8.2.2.12 VCC Capacitor CVCC
- 8.2.2.13 Output Voltage Divider RFB1, RFB2
- 8.2.2.14 Soft-Start Capacitor CSS
- 8.2.2.15 Restart Capacitor CRES
- 8.2.2.16 Low-Side Power Switch QL
- 8.2.2.17 High-Side Power Switch QH and Additional Parallel Schottky Diode
- 8.2.2.18 Snubber Components
- 8.2.2.19 Loop Compensation Components CCOMP, RCOMP, CHF
- 8.2.3 Application Curves
- 8.1
Application Information
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文档支持
- 12机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息
11 器件和文档支持
11.1 器件支持
11.1.1 开发支持
11.1.1.1 使用 WEBENCH® 工具定制设计方案
请单击此处，借助 WEBENCH® Power Designer 并使用 LM5122 器件创建定制设计方案。
- 在开始阶段键入输出电压 (VIN)、输出电压 (VOUT) 和输出电流 (IOUT) 要求。
- 使用优化器拨盘优化关键设计参数，如效率、封装和成本。
- 将生成的设计与米6体育平台手机版_好二三四 (TI) 的其他解决方案进行比较。
WEBENCH Power Designer 提供一份定制原理图以及罗列实时价格和组件可用性的物料清单。
在多数情况下，可执行以下操作：
- 运行电气仿真，观察重要波形以及电路性能
- 运行热性能仿真，了解电路板热性能
- 将定制原理图和布局方案导出至常用 CAD 格式
- 打印设计方案的 PDF 报告并与同事共享
有关 WEBENCH 工具的详细信息，请访问 www.ti.com/WEBENCH。
11.2 接收文档更新通知
要接收文档更新通知，请导航至 ti.com 上的器件米6体育平台手机版_好二三四文件夹。请单击右上角的通知我 进行注册，即可收到任意米6体育平台手机版_好二三四信息更改每周摘要。有关更改的详细信息，请查看任意已修订文档中包含的修订历史记录。
11.3 社区资源
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use.
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TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers.
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Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support.
11.4 商标
E2E is a trademark of Texas Instruments.
WEBENCH is a registered trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
11.5 静电放电警告
这些装置包含有限的内置 ESD 保护。 存储或装卸时，应将导线一起截短或将装置放置于导电泡棉中，以防止 MOS 门极遭受静电损伤。
11.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.