WEBENCH design process+simple 5V to 3.3V DCDC converter design

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WEBENCH design process+simple 5V to 3.3V DCDC converter design [Copy Link]

1、 Before design, first determine what to design. Since the current mainstream monolithic integrated chips have adopted 3.3V or lower power supply voltage, the original popular 5V power supply can no longer meet these requirements. Therefore, the design content is to design a DCDC reducing circuit that converts easily available DC5V to DC3.3V, and the maximum output power can reach 300mA
2、 Tools to be used: TI's online design software WEBENCH
3、 Access the software home page through the following link: http://www.ti.com.cn/lsds/ti_zh/analog/webench/overview.page

In the figure above, we can see that the whole interface is very beautiful. If we don't look carefully, we just think it is a general web page. But in fact, the parameter input box in the lower right corner has some secrets. Let's look down;
To successfully use this powerful online design software, you must first register a website account, click "Register" in the upper right corner of the page to enter the account registration, and then log in to enter this page again after completion;

4、 Input the desired input/output parameters in the parameter input box at the lower right corner, as shown below:

Select the power label, DC, the input voltage is 4.8 to 5.5 (some fluctuations are allowed), the output voltage is 3.3V, the output power is 0.5A, and of course, you can choose a larger one, but here you can choose according to the actual requirements, regardless of temperature and multiple loads, and then click "Start Design", so you will enter a magical world:

At this time, it may take about 1 minute to start loading the parts required by the design software in a new window. After success, the following selection box will appear:

Three types of power supply are shown here: low EMI module type, low cost and easy to use high integration type, high performance and most stable control type. We can choose the appropriate type according to needs. Here I choose the high integration type suitable for use with the single-chip microcomputer, Of course, if you want to compare the three types, you can select "Compare all types" below. After selecting, you will enter the main interface, which contains a lot of information:

We can see that many schemes that meet our design requirements have been listed below. We mainly look at the relevant information of these schemes. Other information will be discussed in the following posts. The first column corresponds to a scheme. We can see the main components used, circuit schematic diagram, cost, efficiency and other details. Here I choose the first one, Click "Open Design" to enter the operation of the next stage:

The whole design process is completed in this interface. Here we can see the power curve, schematic diagram, component list and other information of the circuit. Click to view the large picture. Enter the desired name and corresponding description in the "Name" and "Note" columns at the bottom left, and click Save. If you want to print the information of the whole design, Click "Print" on the toolbar in the upper right corner to output the print results:

So far, a simple power design process has been completed. The above is just the most basic process. I don't use the powerful functions provided by this online software very much. Let's discuss it with you in the following article