Professional IC Distribution & Technical Solutions

The HLMP-2350 is a red LED manufactured by EVERLIGHT. Below are its key specifications:

• Color: Red
• Wavelength: 625 nm (typical)
• Luminous Intensity: 20 mcd (minimum) at 20 mA
• Forward Voltage: 1.8 V (typical) at 20 mA
• Viewing Angle: 30°
• Package Type: T-1 3/4 (5 mm round)
• Lead Material: Copper alloy
• Operating Temperature Range: -30°C to +85°C
• Storage Temperature Range: -40°C to +100°C

For detailed performance curves and reliability data, refer to EVERLIGHT's official datasheet.

# HLMP-2350: Technical Analysis and Implementation Considerations

## Practical Application Scenarios

The HLMP-2350 is a high-performance LED manufactured by Fairchild, commonly used in applications requiring reliable visual indicators. Its key characteristics—low power consumption, high brightness, and compact form factor—make it suitable for diverse scenarios:

1. Industrial Control Systems: The HLMP-2350 is often deployed in control panels to signal operational status (e.g., power-on, fault detection). Its robustness against electrical noise and wide operating temperature range (-40°C to +85°C) ensures reliability in harsh environments.

2. Consumer Electronics: Devices such as routers, printers, and audio equipment utilize this LED for power/activity indicators. Its compatibility with low-voltage DC circuits (typical forward voltage: 2.1V) aligns well with 3.3V or 5V logic systems.

3. Automotive Displays: While not a primary illumination source, the HLMP-2350 serves as an auxiliary indicator in dashboard controls due to its long lifespan (>100,000 hours) and resistance to vibration.

4. Medical Equipment: The LED’s consistent output and low heat generation make it ideal for non-critical status displays in devices like patient monitors or diagnostic tools.

## Common Design-Phase Pitfalls and Avoidance Strategies

1. Thermal Management Oversights:

• *Pitfall*: Excessive current drive can degrade the LED prematurely.
• *Solution*: Adhere to the absolute maximum rating (e.g., 30mA forward current) and implement current-limiting resistors or constant-current drivers.

2. Inadequate Voltage Matching:

• *Pitfall*: Directly connecting to variable power supplies without regulation risks overvoltage damage.
• *Solution*: Use a series resistor calculated via \( R = (V_{supply} - V_f) / I_f \), where \( V_f \) is the forward voltage and \( I_f \) the desired current.

3. Optical Misalignment:

• *Pitfall*: Poorly designed lens or reflector housings reduce visibility.
• *Solution*: Simulate or prototype the mechanical layout to ensure optimal viewing angles (HLMP-2350’s typical viewing angle is 60°).

4. EMI Interference:

• *Pitfall*: Unshielded traces near high-frequency circuits can induce flicker.
• *Solution*: Route LED traces away from noisy signals and use decoupling capacitors if necessary.

## Key Technical Considerations for Implementation

1. Electrical Parameters:

• Forward Current: 20mA (recommended), 30mA (max).
• Reverse Voltage: 5V (max); transient spikes above this require protection diodes.

2. Optical Performance:

• Wavelength: 635nm (red), with luminous intensity varying by binning. Specify tight bins for uniform brightness in multi-LED arrays.

3. Mechanical Integration:

• Package: T-1 (3mm) through-hole design. Ensure PCB hole spacing matches datasheet specifications (e.g., 2.54mm pitch).

4. Environmental Resilience:

• Humidity Sensitivity: Non-critical (MSL 1 per JEDEC standards