Participate in power supply knowledge exchange and win gifts! !

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Participate in power supply knowledge exchange and win gifts! ! [Copy link]

Power supply plays a very important role in electronic design. As long as you make circuits, you will encounter power supply problems to a greater or lesser extent. Therefore, this month we are holding a power supply knowledge exchange event, and everyone is welcome to actively participate.

Netizens can post questions on the EE power board, and ask experienced netizens to help answer them. After the event, the judges will select three "most valuable questions" and three "best replies". Netizens who actively participate in this event can also receive exquisite gifts provided by EE.

If netizens have any ideas or opinions on power supplies, or any good knowledge articles, please post them in the power supply section, and I will help you transfer them to this section.

Note:

• Please do not post your questions in this section, otherwise you will not be able to participate in the awards.
• Pleasemark the "Theme Month" logo in the title of your question so that I can immediately forward it to this post

Awards:

• Three winners of the Best Reply Award, each with a Xiaomi power strip as prize
• Three winners of the Most Valuable Question Award, each with a nail clipper set as prize
• Awards for active participation: a large leather book

Event time:

From now until May 31

Topic:

Tell me about your first electric shock~

Original:

Basic knowledge of power supply 01

User question:

• Please analyze the bridge full-wave rectifier circuit. If the diodes in the circuit have the following conditions, what will happen respectively?
• What is the difference between the principle of amplifying sound between a loudspeaker at a radio station and a loudspeaker made of tinplate?
• Why don't headphones need to be plugged in, but speakers do?
• What are the two main types of LED power drive methods?
• Why do capacitors in switching power supplies require "high frequency and low resistance"?
• Why can't carbon film resistors be used in switching power supplies?
• What is the basic working principle of industrial power supply?
• Why is the output of the amplifier equivalent to a voltage source?
• What are the differences and connections between voltage source, current source and power supply?
• What is the effect of the DC/DC output resistance of the switching power supply on the fall time?
• Designing ultra-low voltage to 12V
• Problems with surge protection of photovoltaic grid-connected inverters
• What is the dead zone of PWM? Can you explain it briefly?
• What is the difference between a 0Ω resistor and a direct connection on a circuit board?
• For ICs with high power requirements, what should I pay attention to when designing power supply and Layout?
• Power supply ripple test and impact issues
• Is it possible to design a dcdc isolated micro-power power supply module?

This content is originally created by EEWORLD forum user Gao Jin. If you want to reprint or use it for commercial purposes, you must obtain the author's consent and indicate the source

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Recommendation of excellent resources for power supply (I):

• Switching Power Supply Design Second Edition High Definition Bookmark Edition
• Mastering Switching Power Supply Design Scanned Version Chinese Edition
• Design and Application of Switching Regulated Power Supply (Hasegawa Akira)
• Switching power supply printed circuit board (PCB) engineering design
• Electromagnetic compatibility design and test of switching power supply

Recommendation of power supply quality resources (II):

• The important role of bypass capacitor in PCB design
• Design and Application of Switching Regulated Power Supply (PDF) Illustrated Practical Electronic Technology Series
• _Switching_Power_Supplies_A_to_Z
• Design of Flyback Switching Power Supply Transformer (Treasure Book)
• 30 Examples of Power Switch Design Secrets (Written by TI Engineers)

Known as "the most powerful switching power supply design software in the world"

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Netizens share power knowledge posts:

• The advantages and disadvantages of AC transmission lines and DC transmission lines
• Theme month - Edison and Tesla's DC vs. AC battle
• Power knowledge you will understand once it is mentioned - from Buck-Boost to Flyback
• Popular Science Post on PWM Dead Zone
• The Concept and Basic Principle of PWM "Dead Zone"
• How to Start Power Supply Design (Transfer)

rowen800

There are three main functions of 0 ohm resistors on circuit boards. First, they are used as a break for testing and debugging. After testing and debugging, the 0 ohm resistor is used to close the break. Second, when making printed circuit boards, if jumper wires cannot be made, a 0 ohm resistor is connected on the front instead. Third, it is used as a fuse. Once the current is too large, the resistor will melt. It plays a role in short circuit and overload protection.

smart_shan

Thanks for sharing

billy_yuan

[quote]rowen800 posted on 2018-5-15 09:52 There are three main functions of 0 ohm resistors on circuit boards. First, they are used as breakouts for testing and debugging. After testing and debugging, they are closed with 0 ohm resistors. Second, they are used for testing, to facilitate disconnection during certain tests, and to separate different grounds, for EMC verification, etc. . .

lxlong_006

Thank you for sharing, thank you very much