
Get the free chapter 11 evaluating design solutions
Get, Create, Make and Sign chapter 11 evaluating design



Editing chapter 11 evaluating design online
Uncompromising security for your PDF editing and eSignature needs
How to fill out chapter 11 evaluating design

How to Fill out Chapter 11 Evaluating Design:
Who Needs Chapter 11 Evaluating Design:
Instructions and Help about chapter 11 evaluating design
Hello my name is Dennis Lafayette cough I'm systems and applications engineer from the simple suture group at Texas Instruments, and today I want to talk to you about the new LM for 3603 buck converter EMI and board layout let's go to the screen here and talk about buck converter Heidi RET loops the most important thing and switching regulators is looking at the high DI/DT loops identifying where those sit on the board and making those as small as possible so for a buck converter the high DI/DT loop is formed by the input capacitor the V in terminal the high side switch the low side switch and the ground terminal and keeping this loop as small as possible will make sure that the inductance formed by this loop is also small as possible why is this important because higher inductance in the presence of high DI DT equals more noise and that noise is going to show up as high am I and also can affect the normal operation of the buck converter another topic we should look at is protecting sensitive nodes the feedback node is a sensitive node and has to be as small as possible the trace is connected to the feedback pin should be short and thin, so they don't pick up any noise it's very often that we see this rule violated the feedback trace on many boards is long and thick and that is not good because it affects the performance of the regulator, and it could also affect the EMI shielding is also very important here we have a two boards two board examples one it has two layers and the other one has four layers the component placement is the same it's the same bomb components sit on top the routing is exactly the same the only difference is we have two additional shielding layers in between and from a test candle we did here in our three-meter chamber we can see that adding additional ground layers in the middle can result in reduced EMI in this case we had five DB difference below the SIS per twenty-two Class V line let's take a look at the four 3603 board layouts we have the board here, but it would be easier to look at the layout on the screen the LM four 3603 panels was designed so that you can have easy layout and EMI good EMI performance the whole family of converters has the same pin out so all the parts are pin-to-pin compatible, so your board level will be compatible with any part from that family now let's look at the pin out the said that the high DI DT loop in a buck converter is formed by the input capacitor the high side switch and the low side switch ground so in the four 3603 the VN pin and the P ground pins are right next to each other, so that allows you to place the input capacitor as close as possible making this loop as small as possible and which decreases the inductance in this high DI DT loop another important thing to point out is that switches on the opposite side so that you all you have to do is bring switch out and connect it straight to the inductor you don't have to send the switch node to other layers because that would...
For pdfFiller’s FAQs
Below is a list of the most common customer questions. If you can’t find an answer to your question, please don’t hesitate to reach out to us.
Where do I find chapter 11 evaluating design?
How can I edit chapter 11 evaluating design on a smartphone?
Can I edit chapter 11 evaluating design on an iOS device?
What is chapter 11 evaluating design?
Who is required to file chapter 11 evaluating design?
How to fill out chapter 11 evaluating design?
What is the purpose of chapter 11 evaluating design?
What information must be reported on chapter 11 evaluating design?
pdfFiller is an end-to-end solution for managing, creating, and editing documents and forms in the cloud. Save time and hassle by preparing your tax forms online.
