A good PCB layout for optimal thermal performance involves placing the LED2472GBTR near a thermal pad or a heat sink, and ensuring good thermal conductivity between the device and the PCB. A 2-layer or 4-layer PCB with a solid ground plane is recommended. Avoid placing thermal vias under the device, and keep the thermal pad clear of solder mask.
To ensure reliable operation at high temperatures, ensure the device is operated within the recommended junction temperature range (TJ) of -40°C to 150°C. Implement proper thermal management, such as heat sinks or thermal interfaces, and avoid overheating the device. Monitor the device's thermal performance and adjust the design accordingly.
The recommended input capacitor value is 1-10 μF, with a voltage rating of 10-50 V. A low-ESR ceramic capacitor (e.g., X5R or X7R) is recommended for its high reliability and low equivalent series resistance (ESR).
To minimize EMI, use a shielded cable or a twisted pair for the LED connections, and keep the LED2472GBTR away from noise sources. Implement a good grounding scheme, and use a common-mode choke or a ferrite bead to filter out high-frequency noise.
The recommended LED current sense resistor value depends on the specific application and the desired LED current. A typical value is 1-10 Ω, but it may need to be adjusted based on the LED's forward voltage and the desired current. Consult the LED's datasheet for specific recommendations.
LED2472GBTR datasheet
by STMicroelectronics
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