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The part TC07-11GWA is a T-1 3/4 (5mm) LED manufactured by Kingbright.

Specifications:

• Color: Green
• Wavelength: 565nm (typical)
• Lens Appearance: Water clear
• Forward Voltage (Vf): 2.2V (typical), 2.6V (max)
• Reverse Voltage (Vr): 5V (max)
• Luminous Intensity (Iv): 5.0mcd (min), 10.0mcd (typical) at 20mA
• Viewing Angle: 60°
• Operating Temperature Range: -40°C to +85°C
• Lead Soldering Temperature: 260°C for 5 seconds

Descriptions & Features:

• Package Type: Radial leaded
• Material: Epoxy resin
• Lead-Free & RoHS Compliant
• Reliable and long-lasting performance
• Suitable for general-purpose indicator applications

This LED is commonly used in electronic displays, indicators, and lighting applications.

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# TC07-11GWA: Technical Analysis and Implementation Guide

## Practical Application Scenarios

The TC07-11GWA from Kingbright is a surface-mount, right-angle infrared (IR) emitter designed for applications requiring reliable optical signaling. Its compact form factor and high-efficiency emission make it suitable for:

1. Proximity and Object Detection – Integrated into automated systems, the emitter pairs with phototransistors or photodiodes to detect object presence, commonly used in industrial automation and robotics.

2. Optical Encoders – Provides precise IR beams for rotary or linear encoders in motor control and position sensing applications.

3. Barrier-Type Sensors – Used in security systems, vending machines, and assembly lines where beam interruption triggers an event.

4. Consumer Electronics – Found in touchless interfaces, such as gesture recognition in smart devices, due to its fast response time.

The right-angle design allows for flexible PCB placement, enabling compact layouts in space-constrained environments.

## Common Design-Phase Pitfalls and Avoidance Strategies

1. Insufficient Forward Current Regulation

• Pitfall: Overdriving the emitter reduces lifespan and efficiency.
• Solution: Adhere to the datasheet’s forward current (IF) specifications (typically 50mA max) and implement current-limiting resistors or constant-current drivers.

2. Optical Misalignment

• Pitfall: Poor alignment with the receiver leads to signal degradation.
• Solution: Use mechanical guides or automated alignment tools during assembly. Verify alignment with an oscilloscope during testing.

3. Thermal Management Issues

• Pitfall: High duty cycles or ambient heat can cause thermal drift, altering emission characteristics.
• Solution: Ensure adequate PCB heat dissipation (e.g., thermal vias) and avoid continuous operation at maximum ratings.

4. Inconsistent Wavelength Matching

• Pitfall: Mismatched emitter-receiver wavelengths (e.g., pairing a 940nm emitter with an 850nm sensor) reduces sensitivity.
• Solution: Verify spectral compatibility between emitter and detector components.

## Key Technical Considerations for Implementation

1. Electrical Parameters

• Forward voltage (VF) typically ranges between 1.2V–1.4V at 20mA.
• Peak wavelength is 940nm, ideal for IR sensing applications.

2. Mechanical Integration

• The right-angle package requires precise PCB placement to avoid shadowing or beam obstruction.
• Ensure solder pad dimensions match the recommended footprint to prevent tombstoning.

3. Environmental Factors

• Operating temperature range (-40°C to +85°C) must be considered for outdoor or harsh environments.
• Dust or moisture can scatter IR light; use conformal coating if necessary.

By addressing these factors, designers can optimize the TC07-11GWA’s performance in target applications while mitigating common failure modes.