The ELD-406SYGWB is a surface-mount LED component manufactured by EVERLIGHT. Below are its key specifications, descriptions, and features:
Specifications:
- Manufacturer: EVERLIGHT
- Color: Super Yellow Green
- Wavelength: 568nm (typical)
- Luminous Intensity: 400mcd (minimum) at 20mA
- Forward Voltage (Vf): 2.1V (typical), 2.5V (max) at 20mA
- Viewing Angle: 120°
- Package Type: PLCC-2 (Plastic Leaded Chip Carrier)
- Dimensions: 3.2mm x 2.8mm x 1.9mm
- Operating Temperature Range: -40°C to +85°C
- Storage Temperature Range: -40°C to +100°C
Descriptions:
- High Brightness: Provides strong luminous intensity for visibility in various applications.
- Wide Viewing Angle: 120° ensures broad light distribution.
- Surface-Mount Design: Suitable for automated PCB assembly.
- Reliable Performance: Designed for long-term stability in industrial and consumer electronics.
Features:
- Low Power Consumption: Efficient operation at low forward voltage.
- RoHS & Halogen-Free Compliant: Environmentally friendly manufacturing.
- Moisture Sensitivity Level (MSL): MSL 2a (per J-STD-020)
This LED is commonly used in indicator lights, backlighting, automotive displays, and electronic signage.
For detailed technical data, refer to the official EVERLIGHT datasheet.
# ELD-406SYGWB: Technical Analysis and Implementation Considerations
## Practical Application Scenarios
The ELD-406SYGWB, a high-brightness SMD LED manufactured by EVERLIGHT, is designed for applications requiring robust illumination in compact form factors. Key use cases include:
1. Automotive Lighting:
- Daytime Running Lights (DRLs): The LED’s high luminous intensity (typ. 1200 mcd at 20 mA) and wide viewing angle (120°) ensure visibility in daylight.
- Interior Lighting: Used in dashboard backlighting due to its stable color consistency (dominant wavelength 570 nm) and low power consumption.
2. Consumer Electronics:
- Indicators for Smart Devices: Ideal for status LEDs in wearables and IoT devices, leveraging its small footprint (3.2 mm × 2.8 mm) and low forward voltage (2.1 V typ.).
3. Industrial Equipment:
- Machine Vision Systems: The yellow-green emission (585 nm peak) suits contrast enhancement in automated inspection environments.
## Common Design-Phase Pitfalls and Avoidance Strategies
1. Thermal Management Issues:
- Pitfall: Overdriving the LED beyond 30 mA (absolute maximum rating) without adequate heat sinking reduces lifespan.
- Solution: Implement PCB thermal vias or metal-core boards to dissipate heat. Use pulse-width modulation (PWM) for brightness control to minimize steady-state current.
2. Optical Misalignment:
- Pitfall: Improper lens design or placement leads to uneven light distribution.
- Solution: Simulate beam patterns using ray-tracing software and validate with prototyping. Ensure mechanical tolerances in housing design account for LED placement (±0.2 mm).
3. Electrical Overstress:
- Pitfall: Voltage transients from inductive loads (e.g., automotive relays) damage the LED.
- Solution: Add transient voltage suppression (TVS) diodes or series resistors to limit inrush current.
## Key Technical Considerations for Implementation
1. Forward Current Control:
- Maintain drive current at 20 mA for optimal efficiency. Exceeding 25 mA accelerates lumen depreciation.
2. ESD Sensitivity:
- The LED is rated for Class 1 ESD protection (HBM: 2 kV). Handle with ESD-safe equipment during assembly.
3. Environmental Robustness:
- The component operates from -40°C to +85°C. For harsh environments (e.g., automotive underhood), verify solder joint integrity under thermal cycling.
By addressing these factors, designers can leverage the ELD-406SYGWB’s performance while mitigating risks in high-reliability applications.