Professional IC Distribution & Technical Solutions

Part Number: 17-21/T1D-CP2R1TY/3T

Manufacturer: EVERLIGHT

Specifications:

• Type: LED (Light Emitting Diode)
• Color: White
• Forward Voltage (Vf): 3.0V (typical)
• Forward Current (If): 20mA (typical)
• Luminous Intensity: 8000-12000 mcd (millicandela)
• Viewing Angle: 120°
• Package Type: SMD (Surface Mount Device)
• Dimensions: 3.2mm x 2.8mm x 1.9mm
• Operating Temperature Range: -40°C to +85°C

Descriptions:

The 17-21/T1D-CP2R1TY/3T is a high-brightness white LED from EVERLIGHT, designed for surface-mount applications. It offers a wide viewing angle and consistent luminous intensity, making it suitable for backlighting, indicators, and general lighting purposes.

Features:

• High luminous efficiency
• Wide viewing angle (120°)
• Low power consumption
• Compact SMD package
• RoHS compliant
• Reliable performance across a broad temperature range

This LED is commonly used in consumer electronics, automotive lighting, and industrial applications.

# Technical Analysis of EVERLIGHT’s 17-21/T1D-CP2R1TY/3T LED Component

## 1. Practical Application Scenarios

The 17-21/T1D-CP2R1TY/3T is a high-performance LED component from EVERLIGHT, designed for applications requiring precise optical performance and reliability. Key use cases include:

• Automotive Lighting: Used in daytime running lights (DRLs), turn signals, and interior ambient lighting due to its high luminous intensity and thermal stability.
• Industrial Indicators: Suitable for status indicators in machinery and control panels, where consistent brightness and long lifespan are critical.
• Consumer Electronics: Integrated into backlighting for displays and decorative lighting, leveraging its compact form factor and energy efficiency.
• Medical Devices: Employed in diagnostic equipment where stable, flicker-free illumination is necessary for accuracy.

The component’s wide operating temperature range (–40°C to +85°C) and low power consumption make it ideal for harsh environments and battery-powered systems.

## 2. Common Design-Phase Pitfalls and Avoidance Strategies

Thermal Management Issues

Pitfall: Inadequate heat dissipation can degrade LED performance and lifespan.

Solution: Implement proper PCB thermal vias, heatsinks, or metal-core PCBs to maintain junction temperature within datasheet limits.

Electrical Overstress (EOS)

Pitfall: Voltage spikes or incorrect current limiting can cause premature failure.

Solution: Use constant-current drivers and transient voltage suppression (TVS) diodes to protect the LED.

Optical Misalignment

Pitfall: Improper lens or reflector alignment reduces light output efficiency.

Solution: Verify mechanical tolerances in the housing design and use optical simulation tools during prototyping.

Inconsistent Color Output

Pitfall: Variations in forward voltage (Vf) can lead to uneven brightness in parallel configurations.

Solution: Use binning-compliant LEDs or drive each LED with an independent current regulator.

## 3. Key Technical Considerations for Implementation

• Forward Current (If): Operate within the specified range (e.g., 20mA–30mA) to ensure optimal brightness and longevity.
• ESD Sensitivity: Follow ESD protection protocols during handling and assembly (e.g., IEC 61000-4-2 compliance).
• Solder Profile: Adhere to reflow soldering recommendations (peak temperature, dwell time) to prevent thermal damage.
• Optical Design: Select appropriate diffusers or lenses to achieve desired beam angle and uniformity.

By addressing these factors, designers can maximize the performance and reliability of the 17-21/T1D-CP2R1TY/3T in their applications.