WEBENCH Power Architect now supports Power Management Units (PMUs and PMICs)
Multiple-load system solutions created in WEBENCH Power Architect now can benefit from the higher integration of Power Management Units. The complex load requirements are matched to the capabilities of several popular PMUs to identify the best match for overall cost, efficiency, and board area.
To get started, go to www.ti.com and use the WEBENCH entry panel on the right side of the page. From their, click on the Power Architect button.
Click "Configure your Loads"
Once WEBENCH loads, you will be presented with a screen to enter your design parameters. First enter your input voltage in the Source List section at the top of the page. Then enter your specific load criteria in the Loads section. For each load this includes the output voltage, load current, Vout peak to peak tolerance, ripple filter required, separate supply required, LDO required, soft start type, load group and sequence order. Click the Add Loads button near the top right of the page to add additional loads.
If you would like to show only PMU solutions in the results, check the Prefer PMIC/PMU checkbox. When you are done entering your design criteria, click on the Submit Project Requirements button.
Optimize for cost, size and efficiency
This page shows the various different solutions for your design criteria comparing PMU solutions side by side with discrete solutions. On the left side of the page is a graph showing the total system efficiency on the x axis, the total system footprint on the y axis and the total system cost as the bubble size. There is a table of these values in the middle of the screen and a block diagram of the selected solution on the right. In this case the top ranked solution is a PMU based project with the lowest cost and smallest footprint.
As the optimizer dial is turned, new sets of system power architectures are added to the ball graph which are designed with the component selection algorithms tuned to the optimizer dial setting. For example, when you turn the dial to smallest footprint, designs are optimized to use the smallest parts using high switching frequencies. And when the dial is turned to highest efficiency, the frequency is reduced to improve switching losses and achieve high efficiency.
On the View/Edit page, there are pie charts which allow the user to examine the contributions of each supply in the system to the power dissipation, BOM price and footprint. By clicking on a supply, the user can get more details.
Next click on the Create Project Design button to save the project and go to the next step.
After creating the project, you now have access to all the WEBENCH design features such as the schematic, bill of materials, operating values, charts, export and reporting. From here you can change individual BOM component values and see the effect on efficiency, cost and footprint and other key operating values such as currents, power dissipation, duty cycle, and temperature.
When a PMU design is loaded, it shows a block diagram of the PMU channels in the left panel and the overall PMU summary in the right portion of the screen. Individual channels can be accessed by either clicking the block diagram or using the PMU Options drop down menu below the Optimizer Dial. Each block represents a channel within the PMU and all the channels for a PMU have the same color.
The schematic in the initial summary view shows all of the channels present. The operating values and BOM in the initial summary view are for the entire PMU with all the channels. Information for individual channels can be accessed via the PMU Options drop down menu.
Print the PDF report
The PDF report summarizes the project and gives details on each supply used.