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Editing A Power Architect Tree

What if a user specifies a specific tree configuration?

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WEBENCH Power Designer

WEBENCH Visualizer

The WEBENCH Tool Suite

Power Architect, FPGA

/Processor and System Power

Architect

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Design This Power Supply In Seconds?

Many Loads, Many Supplies

• Core Supply 1.25V@3.0A

• FPGA IO 3.3V@0.5A

• Vcca 3.3V@0.2A

• Flash 3.3V@2.0A

• SDRAM 1.8V@1.0A

• CCD 2.5V@0.2A

• PLL 1.25@0.2A

• Motor Control 12V@2.0A

• Miscellaneous 3.3V@2.0A

9 Loads and 5 Voltages

WEBENCH® FPGA Power Architect

Add FPGA

Select Device From List

Configure Loads

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FPGA Issues

• The output current is a nominal value– Users should use vendor supplied current calculators to verify the actual

current used for the specific application/utilization

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Enter Additional Loads

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Voltage, Current, and Special Requirements Included For:

• Max Voltage Ripple• Isolated Supplies• Soft Start• Post Supply Filters• LDO Preferred Add All Of Your Own Additional System Loads

Next

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Sequencing Requirements

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• Sequencing requirements of the selected FPGA/uP captured

• Modify sequencing based on system requirement

• Devices with Enable pin are selected to meet sequencing requirements

• Rails with same output voltage but different sequencing requirements are separated to satisfy sequencing requirements

1) Click to see sequencing diagram

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Each Architecture Is Tuned With The WEBENCH Optimizer, Now For Systems

Optimizer Dial

System Efficiency 94%76%

Size

8000

2000

Relative System Cost

WEBENCH FPGA Power Architect Selects The Best Solutions For Every Rail

Intermediate Rail (12V) Supply 2 (1.25V)

Supply 4 (1.8V)

Supply 3 (3.3V)

Supply 5 (2.5V)Lo

ads

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101010

Presenting The User With The Intermediate Rail Options And Performance Trade-Offs

Intermediate Rail Options Can Be Reviewed & Compared Quickly

23V

3V

No I-Rail

12V

5V

12V

Smallest FootprintHighest Efficiency

Lowest Cost

12V

5V

Desired Power Tree

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12V12V, 7.5A

5V, 2.4A

3.3V, .8A

2.5V, .13ALDO

1.9V, 1.9A

1.8V, 1A

1.5V, 1.3A

1.2V, .8A

1V, 1.8A

3.3V

Enter loads

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Enter all loads except for the unregulated 12V, 7.5A load.

Only used 1 input source.

Select Architecture

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Architecture 301 has 5V and 3.3V intermediate rails.This is close to what is in the spec.

Select Alternate Regulator

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2) Select alternate regulator if desired

1) Click to select a regulator postion

Edit the block diagram

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Click on the Edit button

Move Supplies

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1) Click on the supply that you want to move

2) Click on the "Move" drop down to specify move to supply 4

Move Remaining Supplies

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1) Do the same for the remaining supplies

2) Click on the "Move" drop down to specify move to supply 4

Move 1V Supply to Source

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1) Select the 1V supply

2) Click on the "Move" drop down to specify move to Source_DC_1

Save Changes

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Click Save Changes button

Compare to Other Architectures

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Click Compare button

Compare to Other Architectures

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New architecture is higher efficiency, but higher cost and larger footprint.Old New83.4% 86.8%$13.21 $16.111223 1301mm2

Original New

Create Project

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Click Create Project button

WEBENCH Project

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Project designs have now been created and can be manipulated in WEBENCH Designer.