Cree Product Characterisation Tool (PCT)
For help identifying the best Cree XLamp® LEDs for your lighting-system design
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The Cree Product Characterisation Tool (PCT) allows you to select from multiple lighting-system design parameters to compare up to three LED models simultaneously.
For all valid LED drive currents, the PCT quickly and easily does the following:
- Shows all critical LED design parameters, such as luminous flux and efficacy, for selected LED models
- Performs de-rating calculations based on junction temperature (Tj)
- Calculates LED valuations, such as lumens / cost
- Estimates simple LED design parameters, such as the number of LEDs required and total power consumption
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The PCT uses specifications and characteristics from LED data sheets to accurately compare LED parameters with changes in flux, price and junction temperature. The PCT can compare up to three LED models side-by-side to aid in making critical design choices.
The overall layout of the PCT is shown below. The PCT provides three LED models, each displaying the same four design calculations as a function of forward current in the bottom half of the screen. The top half of the screen contains controls for which four design parameters to display, the range of currents to display, and the system parameters for your lighting design.
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