Professional IC Distribution & Technical Solutions

The HLMP-2600 is a high-performance LED (Light Emitting Diode) component originally developed by Agilent Technologies, a division of Hewlett-Packard (HP). Designed for reliability and efficiency, this LED is widely used in indicator and display applications across various industries, including consumer electronics, automotive, and industrial equipment.

Featuring a red diffused lens, the HLMP-2600 emits a clear, uniform light output, making it ideal for status indicators and panel displays. Its compact T-1¾ (5mm) package ensures easy integration into circuit boards while maintaining durability under typical operating conditions. The component operates at a low forward voltage, contributing to energy-efficient performance.

With a wide viewing angle, the HLMP-2600 provides excellent visibility from multiple orientations, enhancing its usability in diverse applications. Its robust construction ensures long-term stability, even in demanding environments.

Engineers and designers favor the HLMP-2600 for its consistent brightness, reliability, and compatibility with automated assembly processes. Whether used in instrumentation, control panels, or signaling devices, this LED remains a trusted choice for clear, dependable illumination.

As a legacy component from a leading innovator in optoelectronics, the HLMP-2600 continues to be a practical solution for applications requiring high-quality visual indicators.

# HLMP-2600: Technical Analysis and Implementation Guide

## Practical Application Scenarios

The HLMP-2600, manufactured by Avago (now Broadcom), is a high-performance LED indicator designed for applications requiring reliable visual signaling. Its key characteristics—low power consumption, high brightness, and compact form factor—make it suitable for diverse use cases:

1. Industrial Control Systems: The HLMP-2600 is commonly deployed in control panels and machinery status indicators due to its robust construction and long lifespan. Its high luminous intensity ensures visibility in low-light or high-ambient-light environments.

2. Consumer Electronics: Devices such as routers, printers, and audio equipment utilize the HLMP-2600 for power-on/standby indicators. Its compatibility with low-voltage DC circuits (typically 2.1V forward voltage) aligns well with 3.3V or 5V logic systems.

3. Automotive Dashboards: While not rated for primary illumination, the HLMP-2600 serves as a secondary status LED in non-critical automotive applications, such as infotainment system feedback.

4. Medical Devices: The LED’s reliability and consistent output make it suitable for equipment status indicators, though adherence to additional EMI/RFI shielding may be necessary for sensitive environments.

## Common Design-Phase Pitfalls and Avoidance Strategies

1. Thermal Management Oversights:

• *Pitfall*: Excessive current drive without proper heat dissipation degrades LED lifespan.
• *Solution*: Limit forward current to ≤20mA (absolute maximum: 30mA) and implement PCB thermal relief pads or heatsinks for high-duty-cycle applications.

2. Incorrect Current Limiting:

• *Pitfall*: Direct connection to voltage sources without resistors causes current runaway.
• *Solution*: Use series resistors calculated via \( R = (V_{supply} - V_f)/I_f \), where \( V_f \) is the forward voltage (2.1V typical) and \( I_f \) is the desired current (e.g., 10–20mA).

3. Optical Misalignment:

• *Pitfall*: Poor viewing angle placement (HLMP-2600 offers a 30° half-angle) reduces visibility.
• *Solution*: Orient LEDs perpendicular to the user’s line of sight or use diffusers for wider coverage.

4. Environmental Compatibility:

• *Pitfall*: Exposure to moisture or chemicals in harsh environments may damage the epoxy lens.
• *Solution*: Select conformally coated variants or add protective enclosures for outdoor/industrial use.

## Key Technical Considerations for Implementation

1. Electrical Parameters:

• Forward Voltage (\( V_f \)): 2.1V (typical) at 20mA.
• Reverse Voltage (\( V_r \)): 5V maximum; transient protection diodes are recommended for AC-coupled circuits.

2. Optical Performance:

• Luminous Intensity: 7.0–20.0 mcd (wavelength-dependent; red: 630nm dominant).
• Viewing Angle: 30° half-angle; narrower than diffused LEDs, requiring precise placement.

3. Mechanical Integration:

• Package: T-1