ROHM recommends a PCB layout with a thermal pad connected to a large copper area on the bottom layer, and multiple vias to dissipate heat efficiently. A minimum of 2oz copper thickness is recommended.
To avoid overheating, ensure the LED is driven within the recommended current range (50-100mA) and voltage range (2.8-3.5V). Use a suitable current limiting resistor and consider adding a thermal protection circuit.
The typical RθJA of the LTR18EZPFLR120 is around 150°C/W, but this value can vary depending on the PCB layout, ambient temperature, and airflow.
While the LTR18EZPFLR120 is not specifically designed for high-humidity environments, it can still be used with proper precautions. Ensure the device is properly sealed and consider adding moisture protection measures, such as conformal coating or potting.
Store the LTR18EZPFLR120 in a dry, dark place with a temperature range of -20°C to 30°C and relative humidity below 60%. Avoid exposing the device to direct sunlight, moisture, or extreme temperatures.
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LTR18EZPFLR120 Overview
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