WEBENCH® LED Architect

Instantly create alternative LED lighting designs and compare them
across efficacy, size, and cost up to 100,000 lumens in output. WEBENCH
LED Architect is very easy to use but it is also very powerful, giving
wide options in comparison, selection, and optimization for lighting

  • Easily specify your desired light output
  • Select from a range of LED and heat sink designs created in seconds
  • Every combination is optimized for thermal management and stable operation
  • Select your preferred drive electronics from our recommended topologies
  • Optimize the overall size, efficiency, and cost for your complete solution
  • Leverage a vast 21,000 passive component library from 110 manufacturers
  • Tune every component selection algorithm with a turn of the Optimizer
  • Dial Save your precious time with system exploration and real time calculations
  • For more info, check out the guided tour video and step-by-step instructions shown below

Guided Video Tour (5:36 mins)

  • Quick start guide to using WEBENCH LED Architect
  • Overview of features and capability
  • Design example

Step by Step:

1. How can you create an optimized LED light with drive electronics and stable thermal management in seconds?

Lets go over a real example. The end use is an LED Street Lamp with 8,000 lumens of output with AC supply voltage of 110-130V. The design requires a harsh ambient temperature as high as 50 °C.

In order to create this lighting solution, a designer would need to consider many things: light output, system cost, generated heat, size, manufacturing complexity, thermal management and the effects of heat on performance, constant current LED driver circuitry and LED dynamic resistance, component selection, system losses and energy efficiency, and supplier selection and time to market, just to name a few.

LED Lighting Design Example:

Table component  

Parameter Specification
Application LED Street Lamp
Light Output 8000 Lumens
Supply Voltage 110-130V AC
Ambient Temperature 50 °C

2. To get our solution, we configured the WEBENCH® LED Architect

  • AC Source Voltage: 110-130V
  • Temp: 50oC
  • Target Lumens: 8800 (allowing for 10% loss through lensing)
  • Color: cool white

Press Recalculate after the updates

3. Compare and evaluate the resulting complete lighting designs

a: 8800 Lumens
Optimizer Setting 3
53 Cree MX6 LEDs
66x25cm heat sink
$150 BOM cost (1k volume)


 b: Visualizer graph displays comparison value
Recommendation is green ball to left
Or top row in table

 c: Filter the results with the sliders at top

4. Quickly look at alternatives

a: 8800 Lumens
Optimizer Setting 2 (size and cost focus)
48 Cree MX6 LEDs
47x25cm heat sink
$127 BOM cost (1k volume)

The design requires lower cost so we will use the Optimizer Dial and
tune the results to lower cost by turning the dial to setting 2. This
will shift the design to drive more current through the LEDs for the
same 8800 lumen output but with fewer LEDs.

The design also desired smaller footprint. A smaller heat sink will
require a rise in the operating temperature of the design. With both a
smaller footprint and more heat dissipation from the LEDs at Dial
setting 2, the effect of this compromise on the lifetime of the product
must be considered in real world applications.

The Architect allows the temperatures to rise to the manufacturer's
maximum temperature ratings for Dial settings 1 and 2. The benefit is
smaller footprint and lower cost with the penalty of increased operating
temperature. Operating temperature can be user controlled through the
Advanced Inputs panel.

5. Evaluate other lighting design scenarios with the Optimizer Dial

Through the Optimizer Dial setting, you can adjust the calculations for the selection of every component in WEBENCH® LED Architect at a system level.

At Optimizer Dial setting one, every equation and library selection
is pushed to smallest physical size. Using 86 very small LEDs to output
8800 lumens, the complete lighting solution can be created and manage
the heat dissipation safely in a 13x25cm2 space.

Alternatively, if you want the highest luminous efficacy (or energy
efficiency), you could turn the dial to setting 5 where every selection
would shift toward efficiency.

Of course at every setting, the designer can control or tune every selection through the advanced inputs link.

Press the Select button for the LED/Heat Sink combination that you prefer. We chose option 2 for our solution

6. Now select from the options for constant current LED driver electronics

Based on the voltage, current, and operating requirements of the lighting selection, now we can configure the drive electronics.

Multiple LEDs can be connected and driven in different ways

  • Series: Lower current, balanced strings, but higher voltage
  • Parallel: Lower voltage, but current sharing issues exist

Driver topology alternatives:

  • Buck, Boost, Buck-Boost

WEBENCH® LED Architect calculates every option for power
architect and presents the best solutions on the following screen in
response to the Select LED click

7. The WEBENCH® Optimizer Dial makes tuning your drive circuit selections easy

The circuit requirements establish the range for successful operation
of your driver circuits and the components that make them work

Within that range, the selection of each component can be tuned or adjusted based on the Optimizer Dial setting.

Of course, these are just default selections. The user is able to
replace any selected component with another within the qualified range
or they can add their own custom components to their circuits instead if
their preferred manufacturer is not available.

8. Evaluate your electronic drive circuit.

For the WEBENCH® Architects like Power Architect and LED
Architect, a project summary panel has been added on the left side of
the basic WEBENCH client dashboard.

Just click on any section of the dashboard where you would like to
examine the information more closely and it will enlarge to fill the
entire screen. A click on the back arrow at the top of the dashboard
will return you back to the main view.

The user can exercise everything about the circuit in the dashboard
including in many cases simulating your circuit electrically for
transient response or thermally to look at the interaction of the power
dissipation for the drive electronics.

9. Prototyping the design.

With one click, you can generate a complete project report for your custom design solution.

This is a dynamically generated PDF containing extensive information
with all of the details of the project including the inputs, the LED
array, heat sink information, driver information, schematics, and BOMs.

For convenience, you can export the complete bill of materials with
ordering part numbers from the Bill Of Materials tab. For Build It!
Supported devices, you can order the complete BOM with same day shipment
depending on component availability selections.

This entire project design can be shared with partners through the Share Design button at the top of the dashboard.

10. Street Light Validation Using LM3464

Design Specification:

Parameter Specification
Application LED Street Lamp
Light Output 8000 Lumens
BOM Cost $135 @ 1k budgetary
Supply Voltage
120 VAC: 36V-52V supply in
Ambient Temperature 50°C

Design Time ~ 30 minutes

Prototype Time ~ 10 days
    (Thinking about it and waiting on boards!)

Prototype Cost ~ $600