Dynamic Thermal Analysis of “vertical” and “faceup” High-Power AlGaInN LEDs at Pulse Operation

The thermal properties, including thermal resistance R
_th
, capacitance C
_th
and time constant τ
_th
of highpower AlGaInN LEDs have been investigated and analyzed. The transient thermal behavior was expressed as a multiexponential function with time constants associated with a specific R
_th,i
and C
_th,i
components of LED structure.