Datasheet

PIN diode Positive Intrinsic Negative diode; diode with undoped intrinsic semiconductor
between positive (p) and negative (n) regions
PMMA Polymethyl methacrylate, transparent thermoplastic; in optical grade used for
lenses
pn junction Layer in the LED chip, where positive (p) and negative (n) charged carriers
recombine to light respectively radiation.
PPA Polyphtalamide (plastic)
PSU Power Supply Unit
PT100 Thermistor made from platin with 100 Ω at 0 °C. Has a Positive Temperature
Coefficient (PTC).
PWM Pulse Width Modulation
SMD Surface Mount Device
TIM Thermal interface material
UV Ultra Violet, with LEDs radiation below 405 nm within the scope of this application
note
VHL
TM
Very High Lumen. This is the name for the newest generation of standard
monochromatic and multi-colored 4-chip ACULEDs.
VIS Visible light, radiation between 405 and 700 nm within the scope of this application
note
Z-diode Zener Diode, usually used as ESD protection
www.excelitas.com Driving the ACULED® VHL™ 28