电源管理

eFuses(集成 FET) – 支持与培训

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电子保险丝培训

获取由电子保险丝专家提供的建议和支持,个性定制您的培训体验。查看按需培训视频、应用手册、参考设计和其他更多资料,了解简要介绍电源开关、电源开关特性以及设计注意事项的精彩内容。

简介

通过我们的介绍性培训课程了解电源开关的基本概念。以下内容可让工程师对不同类型的电源开关有基本的了解。

什么是电子保险丝

标题 说明
What is an eFuse
Learn what an eFuse is, why you need it and how to choose the right one.
Get out of the dark: Upgrade your fuse!
TI’s portfolio of UL -recognized electronic fuses (eFuses) are next-generation fuses that provide active circuit protection and management against short-circuit, overcurrent and overvoltage events.

什么是负载开关

标题 说明
Basics of load switches Learn what load switches are, why you need them and how to choose the right one.
Quiescent Current vs Shutdown Current for Load Switch Power Consumption This application note is targeted towards designers using load switches who wish to better understand quiescent and shutdown current in order to maximize battery life.
Timing of Load Switches This application note goes into detail on how each condition or feature can alter the timing of a load switch so that the variations can be prepared for.
Fundamentals of On-Resistance in Load Switches This application report discusses the fundamentals of load switch On-resistance and how to select a load switch with the right On-resistance depending on the system requirements.
What is a load switch? Learn what a load switch is, and how it can be used for “disconnecting” a power hungry sub-system when in standby, or for point of load control to facilitate power sequencing

替代分立式解决方案

标题 说明
Selecting a Load Switch to Replace a Discrete Solution
Integrated load switches are a great way to reduce board space and improve switching performance and protection over existing discrete MOSFET solutions. 
Integrated Load Switches versus Discrete MOSFETs
The most common approach to load switching solutions is to use a Power MOSFET surrounded by discrete resistors and capacitors; however, in most cases using a fully integrated load switch has significant advantages.
Load Switches vs. Discrete MOSFETs - An introductory comparison between switching solutions
An introductory comparison between switching solutions.
Load Switches vs. Discrete MOSFETs - Problems with a discrete solution and how a load switch can fix them
This video focuses on the technical drawbacks of a discrete MOSFET power switching solution and how a load switch can be used to fix these problems.
How and why to replace discrete MOSFETs with load switches
In this training, you will learn how to identify a discrete power switching solution in a schematic, the challenges of using a discrete solution, and how load switches provide better performance for power switching with more features and a smaller solution size.
When to use load switches in place of discrete MOSFETs The most common approach to switching a load is to use a power MOSFET surrounded by discrete components. But in most cases, using a fully integrated load switch has significant advantages.

特性

更深入了解电源开关的集成功能。浏览我们全面的视频和应用手册资料,这些资料介绍了电源开关的配电和电路保护等优势。 

控制浪涌电流

标题 说明
Managing Inrush Current
This application note explores typical causes of inrush current, problems caused by inrush current, and solutions for inrush current featuring integrated load switches.
Timing of Load Switches
This application note goes into detail on how different design parameters can alter the timing of a load switch so that the variations can be accounted for.
Load Switches vs. Discrete MOSFETs – Inrush Current
This video shows how to handle inrush current with different load switching solutions, such as integrated load switches and discrete MOSFETs.

短路保护

标题 说明
eFuses: clamping and cutoff and auto retry, oh my! – part 1/3
The goal of this three-part blog series is to simplify your eFuse selection process by removing the confusion surrounding the options for overvoltage (part 1), overcurrent (part 2) and fault response (part 3).
eFuses: clamping and cutoff and auto retry, oh my! – part 2/3
The goal of this three-part blog series is to simplify your eFuse selection process by removing the confusion surrounding the options for overvoltage (part 1), overcurrent (part 2) and fault response (part 3).
eFuses: clamping and cutoff and auto retry, oh my! – part 3/3
The goal of this three-part blog series is to simplify your eFuse selection process by removing the confusion surrounding the options for overvoltage (part 1), overcurrent (part 2) and fault response (part 3).

快速输出放电 (QOD)

标题 说明
Don’t leave it floating! Power off your outputs with quick output discharge
Any power rail on the output of a QOD-enabled device will be at a known “zero” or “off” state when the device is disabled. This ensures that when you are designing your system none of your power rails are left floating.
Load Switches vs. Discrete MOSFETs – Load Discharge Timing
When a switch is opened to break the connection between a power supply and load, the voltage on the output of the switch drops. The rate at which the voltage drops is the load discharge timing.

反向电流保护

标题 说明
Reverse Current Protection in Load Switches
This application note outlines where reverse current comes from, why it can be harmful to a system, and how to modify a design to provide protection from reverse current in a system.
Protect your system from reverse current
Reverse current is an event in which current travels in the opposite direction, from output to input. Fortunately, there are a handful of ways to protect your system from reverse current. This blog will give a high-level overview of the solutions that exist.

电源正常

标题 说明
Load Switches vs. Discrete MOSFETs – Voltage Supervision
When a switch is turned on, the output voltage will take time to reach  its final value. Voltage supervision isthe act of monitoring the output  and sending a power good signal to the system when the rail is high.

设计注意事项

合理运用有关电源开关基本原理和功能的知识来优化系统设计。

电源多路复用(ORing 控制)

标题 说明
Power Multiplexing Using Load Switches and eFuses
Texas Instruments' load switch and eFuse portfolio provides the user with a flexible Power MUXing solution for systems that require a controlled transition between supplies. This application note explores concerns related to power MUXing and demonstrates multiple multiplexing solutions.
Load Switches vs. Discrete MOSFETs – Power Muxing
Power muxing otherwise known as ORing, is when there are two or more power supplies that can power the same load. Switches are used to select the appropriate supply depending on the application requirements.

延长电池保质期

标题 说明
Implementing Ship Mode Using the TPS22915B Load Switches
Keeping a battery sufficiently charged during shipment enables a consistent out-of-box experience for the end user. A solution that has gained popularity is the use of a ship mode feature that keeps devices in a low-power state during shipment and while on the shelf.
Don’t let your battery drain on the shelf – use ship mode
The ship-mode circuit utilizes several components to prolong battery life during electronics shipment and provides customers with a consistent out-of-box experience. 
Load Switch Based Ship Mode Reference Design for Wearables
The purpose of this design is to showcase a low power, space saving "ship mode" solution targeted specifically for wearables and other small portable electronics that can be implemented with a simple, low cost load switch.

高电流配置

标题 说明
TPS22976 Dual-Channel Load Switch in Parallel Configuration
This application note demonstrates how to use the TPS22976 dual-channel load switch in parallel configuration to achieve lower RON and higher maximum continuous current.
Achieve 20-A Circuit Protection and Space Efficiency Using Paralleled eFuses
This application note describes the design considerations and performance characteristics of using eFuses in parallel configuration.
Parallel Load Switches for Higher Output Current & Reduced ON-Resistance Reference Design
This TI design showcases different parallel load switch circuits and supplements this information with lab measurements and oscilloscope captures.

热插拔

标题 说明
How to protect your server from hot swap events
Hot swapping is when the user connects an external device or module to expand system capabilities or provide regular maintenance without powering down the host system.
How to integrate your hot swap with an eFuse
If you’re using a hot-swap controller with an external FET for protection, learn how to save space with an eFuse.

电源定序

标题 说明
Load Switches vs. Discrete MOSFETs – Power Sequencing
Power sequencing is when there are multiple rails powering different loads and they need to be turned on in a specific order for proper operation of the system.

设计支持

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生成、优化和仿真符合您独特电源规格的设计。

浏览 1,000 多种经过实验室测试的电源参考设计。

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