Professional IC Distribution & Technical Solutions

The ELD-436HDB/S358 is a high-brightness LED component manufactured by EVERLIGHT. Below are its key specifications, descriptions, and features:

Specifications:

• Color: Red
• Wavelength: 625nm (typical)
• Luminous Intensity: 3000mcd (minimum) at 20mA
• Forward Voltage (Vf): 2.0V (typical)
• Viewing Angle: 30°
• Package Type: 5mm Round LED (T-1 3/4)
• Lead Material: Copper
• Operating Temperature Range: -30°C to +85°C
• Storage Temperature Range: -40°C to +100°C

Descriptions:

• High-Brightness LED: Designed for applications requiring strong visibility.
• Standard 5mm Package: Compact and widely compatible with PCB designs.
• Low Power Consumption: Efficient performance at 20mA drive current.
• RoHS Compliant: Meets environmental safety standards.

Features:

• High Luminous Output: Ensures bright illumination.
• Narrow Viewing Angle (30°): Focused light emission for directed applications.
• Long Lifespan: Durable construction for extended use.
• Lead-Free & Halogen-Free: Environmentally friendly.

This LED is commonly used in indicator lights, automotive lighting, signage, and electronic displays.

*(Note: Always refer to the official EVERLIGHT datasheet for detailed technical parameters.)*

# ELD-436HDB/S358: Technical Analysis and Implementation Guide

## Practical Application Scenarios

The ELD-436HDB/S358, manufactured by EVERLIGHT, is a high-brightness LED designed for demanding applications requiring consistent luminosity and reliability. Key use cases include:

1. Automotive Lighting:

• Employed in daytime running lights (DRLs), brake lights, and interior illumination due to its high luminous intensity (typically >1000 mcd) and wide operating temperature range (-40°C to +85°C).
• Ensures compliance with automotive standards such as AEC-Q101 for component reliability.

2. Industrial Indicators:

• Used in machinery status panels and emergency lighting systems where visibility under harsh conditions (dust, vibration, or moisture) is critical.
• The LED’s robust construction and resistance to environmental stressors make it suitable for factory automation.

3. Consumer Electronics:

• Integrated into appliances and portable devices for backlighting or status indicators, leveraging its low power consumption (forward voltage: ~2.1V) and compact form factor.

4. Outdoor Displays:

• Ideal for signage and traffic signals due to its high efficiency and long lifespan (>50,000 hours), reducing maintenance costs.

## Common Design-Phase Pitfalls and Avoidance Strategies

1. Thermal Management Issues:

• *Pitfall*: Inadequate heat dissipation can degrade performance and lifespan.
• *Solution*: Use PCB designs with thermal vias and heatsinks, ensuring junction temperatures remain within datasheet limits.

2. Electrical Overstress:

• *Pitfall*: Exceeding maximum forward current (e.g., 30mA for ELD-436HDB/S358) causes premature failure.
• *Solution*: Implement current-limiting resistors or constant-current drivers tailored to the LED’s specifications.

3. Optical Misalignment:

• *Pitfall*: Improper lens or reflector design leads to uneven light distribution.
• *Solution*: Simulate beam patterns using optical software and validate with prototyping.

4. Environmental Incompatibility:

• *Pitfall*: Exposure to UV or chemicals may damage the epoxy lens.
• *Solution*: Select variants with protective coatings or housings for harsh environments.

## Key Technical Considerations for Implementation

1. Electrical Parameters:

• Verify forward voltage (Vf) and current (If) compatibility with the driver circuit.
• Account for voltage drops in series configurations.

2. Mechanical Integration:

• Ensure proper alignment with diffusers or lenses to achieve desired illumination angles (e.g., 120° viewing angle for ELD-436HDB/S358).

3. Reliability Testing:

• Conduct accelerated life testing (e.g., 85°C/85% RH) to validate performance under operational extremes.

4. Regulatory Compliance:

• Confirm adherence to RoHS and REACH directives for environmental safety.

By addressing these factors, designers can optimize the ELD-436HDB/S358’s performance while mitigating risks in critical applications.