I have to admit that powering FPGAs has become more and more complicated over time. This article provides some suggestions, hoping to help simplify FPGA power solutions and enable users to create quick and convenient solutions.
There are several power supply design issues that need to be considered when powering FPGAs, such as:
- Increased the number of output voltage rails
- Need to set the set point accuracy for the electric rail
- Need to optimize the passive board layout in the design to achieve extremely low ripple noise
- Requires AC transient response and compensation loop
In addition, don’t forget that there are sorting and more required functions. Figure 1 shows a typical FPGA power solution in the FPGA development kit. In addition to choosing the right devices and inductors to design this solution, you also need to have some other professional knowledge. For example, you need to consider the details of component placement and board layout.
picture 1. Typical FPGA power solution
So,How can we simplify the design?
Fortunately, there are multiple solutions that help simplify. In this article, I will focus on two innovative technologies that can help you achieve your design goals quickly and easily.
The firstThe technology that needs to be introduced is the WEBENCH FPGA Architect design tool (principle design plus simulation results) used to create FPGA power solutions.
The WEBENCH FPGA Architect design tool can help you:
- Choose the FPGA vendor you want
- Choose the FPGA product family you will use
- Meet the power requirements defined by the FPGA power estimator tool provided by FPGA vendors
Performing these few simple steps can achieve FPGA power solutions, and optimize all aspects of product size, efficiency and cost. This easy-to-use tool can help you overcome initial obstacles, reduce design time from days to minutes, and gain a lead.
The secondIt is an integrated inductor power module, which can effectively simplify the design scheme.
Power modules mainly integrate inductors in a single IC package, but other external components such as FETs, compensation loops (if necessary), and feedback resistors can also be integrated. The functional characteristics of the power module are very rich, for example, the enable and power indication good pins can be used for sequencing, and only a minimum of external components are required, such as input capacitors, output capacitors, and possibly a feedback resistor. This module helps to simplify the power solution in Figure 1 to the one in Figure 2. The integrated inductor power module can be used to power the FPGA and is regarded by FPGA manufacturers as a suitable power solution. In addition, these modules also help simplify the board layout, helping you complete your design faster than ever before.
picture 2. Adopt LMZ30602 Integrated inductor power module
The Links: TPS65266RHBR G215HAN01-201
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