Introduces the characteristics and features of Golden Dragon LED
The document introduces the Golden Dragon LED, a high‑performance, high‑current LED from OSRAM Opto Semiconductors. It highlights the LED’s integrated heat slug, tape‑and‑reel packaging, and the need for careful thermal management and current control when designing lighting systems.
Design considerations cover thermal design, electrical characteristics, and recommended driver topologies. The note discusses series resistor limitations, linear and switching current control supplies, and provides example calculations for LED strings and driver selection to ensure reliable operation within the LED’s voltage, current, and temperature limits.
| Forward Voltage (min) | 2.05 V |
|---|---|
| Forward Voltage (typical) | 2.4 V |
| Forward Voltage (max) | 2.65 V |
| Maximum Power Dissipation | 2 W |
| Maximum Junction Temperature | 125 °C |
A current control supply is recommended instead of a simple series resistor because the LED’s steep I‑V slope can cause large current variations with small voltage changes.
The maximum junction temperature is 125 °C.
The forward voltage ranges from 2.05 V (minimum) to 2.65 V (maximum), with a typical value of 2.4 V.
It can dissipate up to about two watts depending on the specific product version.