FPGAs have a number of applications in various industries, including medical imaging, high-performance computing, and more. There is a lot that you can do with FPGAs, but to make them work well you will need to make sure that they are getting enough power.
FPGAs- Highly Flexible and Very Affordable
There are, however, some challenges when it comes to power supplies. Usually, in the scenarios where FPGAs are needed, there will be issues of cost, efficiency, and size – and power supplies tend to either be expensive, bulky or to produce a lot of heat. Modern FPGAs have a lot of inputs and outputs, and the power demands can be quite erratic depending on what the device is doing.
High-power requiring FPGA applications are typically built using cards thar are powered by a 48V backplane. Thes cards need a power supply with a step-down converter that will change the 48V to 12V or 5V. The cards will usually be isolated from each other to protect them, so that there is no chance of them interfering with each other, or of current loops occurring. Oftn, there is a second stage that converts the intermediate voltage to lower DC voltage, by using some non-isolated, Point of Load regulators. When FPGAs are used in automotive, industrial or computing scenarios then they may get their power from a 12V or a 2$ supply that is non isolated.
POL – High Performance Devices
POL regulators are high-performance devices that will use V-out rails that are located close to their loads, solving the problem of high transient current demand and ensuring low noise. If you are considering POLs, then there are some application-level parameters to consider, including size, cost and efficiency.
The priority that should be assigned to each one of those parameters would depend on the end market. Are you considering industrial or medical markets, where you would prefer to have something smaller and aren’t worried about the cost? Or, are you concerned about wireless applications, and want something affordable but where bulk doesn’t matter? If you’re making a consumer device, then you would want to have something quite balanced – because consumers don’t want to spend a lot, but don’t want something too bulky either, and will want the application to perform decently well.
In terms of pwoer supplies, LDOs (Low-Dropout Linear Regulators) are popular because they are easy to implement, but do not produce much noise. Switch-Mode Power Supplies are another popular option – being more than 90 percent efficient, but being a little bit harder to implement. SMPS devices tend to radiate a little more noise, but are good for applications where the power requirements are lower. It is important that you look at the voltage rails, and the current requirements of each of them. In many applications, you can get away with using a single power supply, and then using passive filters to supply the rails that are using the same voltage. Sometimes, a power supply may need to handle a load of over 20A. Get to know more at http://www.directics.com/xilinix-fpga/