LED Lamp 594SYGD/S530-E2 Datasheet - Brilliant Yellow Green - 20mA - 2.0V - English Technical Document

1. Product Overview

This document provides the technical specifications for the 594SYGD/S530-E2 LED lamp. This component is a surface-mount device designed to deliver high brightness in a compact form factor. It is part of a series specifically engineered for applications demanding superior luminous output.

1.1 Core Advantages

The LED offers several key advantages for integration into electronic designs:

• High Brightness: The series is optimized for applications requiring higher levels of luminous intensity.
• Robust Reliability: Designed to be reliable and robust under standard operating conditions.
• Compliance: The product is compliant with RoHS, EU REACH, and Halogen-Free standards (Br <900 ppm, Cl <900 ppm, Br+Cl < 1500 ppm).
• Packaging Flexibility: Available on tape and reel for automated assembly processes.
• Viewing Angle Options: Offered with a choice of various viewing angles to suit different application needs.

1.2 Target Market & Applications

This LED is suitable for a range of consumer and display electronics where indicator lighting or backlighting is required. Typical applications include:

• Television Sets
• Computer Monitors
• Telephones
• General Computer Peripherals

2. Technical Parameter Deep Dive

The following sections detail the critical electrical, optical, and thermal parameters of the LED.

2.1 Device Selection Guide

The 594SYGD/S530-E2 utilizes an AlGaInP (Aluminum Gallium Indium Phosphide) semiconductor chip to produce its Brilliant Yellow Green light. The epoxy resin lens is green and diffused, which helps in achieving a wider and more uniform light distribution.

2.2 Absolute Maximum Ratings

These ratings define the limits beyond which permanent damage to the device may occur. Operation under these conditions is not guaranteed.

2.3 Electro-Optical Characteristics

These characteristics are measured at an ambient temperature (T_a) of 25°C and define the typical performance of the device.

Measurement Notes: Forward Voltage: ±0.1V; Luminous Intensity: ±10%; Dominant Wavelength: ±1.0nm.

3. Performance Curve Analysis

Graphical representations provide insight into the device's behavior under varying conditions.

3.1 Relative Intensity vs. Wavelength

The curve shows the spectral power distribution, peaking at approximately 575 nm (Typ.), which defines the Brilliant Yellow Green color. The spectrum radiation bandwidth is typically 20 nm, indicating a relatively pure color emission.

3.2 Directivity Pattern

The radiation pattern illustrates the 180-degree typical viewing angle (2θ_1/2), confirming a wide, diffused light output suitable for area illumination or wide-angle indicators.

3.3 Forward Current vs. Forward Voltage (I-V Curve)

This curve demonstrates the diode's exponential relationship between current and voltage. The typical forward voltage (V_F) is 2.0V at 20mA. Designers must use a current-limiting resistor or constant-current driver based on this characteristic to ensure stable operation.

3.4 Relative Intensity vs. Forward Current

Luminous intensity increases with forward current but not linearly. Operating above the absolute maximum rating (25mA continuous) is prohibited, as it can lead to accelerated degradation and failure.

3.5 Temperature Dependence

Two key curves show the effect of ambient temperature:

• Relative Intensity vs. Ambient Temperature: Luminous output typically decreases as ambient temperature rises. Proper thermal management is crucial to maintain brightness.
• Forward Current vs. Ambient Temperature: For a fixed voltage, the forward current may change with temperature, affecting light output. A constant-current drive is recommended for stable performance across temperature ranges.

4. Mechanical & Packaging Information

4.1 Package Dimensions

The LED features a standard lamp-style surface-mount package. Critical dimensions include the lead spacing, body size, and overall height. The flange height must be less than 1.5mm. All dimensions are in millimeters, with a general tolerance of ±0.25mm unless otherwise specified. Designers should refer to the detailed dimension drawing in the original datasheet for precise PCB footprint design.

4.2 Polarity Identification

The cathode is typically indicated by a flat side on the LED lens, a notch in the body, or a shorter lead. Correct polarity must be observed during assembly to prevent reverse bias damage.

5. Soldering & Assembly Guidelines

Proper handling is essential to ensure reliability and prevent damage to the LED.

5.1 Lead Forming

• Bend leads at a point at least 3mm from the base of the epoxy bulb.
• Perform lead forming before soldering.
• Avoid stressing the package during forming or cutting.
• Cut leads at room temperature.
• Ensure PCB holes align perfectly with LED leads to avoid mounting stress.

5.2 Storage

• Store at ≤30°C and ≤70% RH. Shelf life is 3 months after shipment.
• For longer storage (up to 1 year), use a sealed container with nitrogen and desiccant.
• Avoid rapid temperature changes in humid environments to prevent condensation.

5.3 Soldering Process

Maintain a minimum distance of 3mm from the solder joint to the epoxy bulb.

Critical Notes:

• Avoid stress on leads at high temperatures.
• Do not solder (dip or hand) more than once.
• Protect the LED from shock/vibration until it cools to room temperature.
• Avoid rapid cooling from peak temperature.
• Use the lowest possible soldering temperature.

5.4 Cleaning

• If necessary, clean only with isopropyl alcohol at room temperature for ≤1 minute.
• Do not use ultrasonic cleaning unless pre-qualified, as it can cause internal damage.

5.5 Heat Management

LED performance and lifetime are highly temperature-dependent.

• Consider heat dissipation during the PCB and system design phase.
• De-rate the operating current appropriately based on the application's ambient temperature. Refer to the de-rating curve (if provided in the full datasheet).
• Control the temperature around the LED in the final application.

5.6 ESD (Electrostatic Discharge) Precautions

This LED is sensitive to electrostatic discharge. Standard ESD handling procedures must be followed during assembly and handling:

• Use grounded workstations and wrist straps.
• Store and transport in anti-static packaging.

6. Packaging & Ordering Information

6.1 Packing Specification

The LEDs are packed to ensure protection from moisture and electrostatic discharge:

1. Primary Packing: Anti-electrostatic bags.
2. Secondary Packing: Inner cartons, typically containing 4 bags.
3. Tertiary Packing: Outside cartons, typically containing 10 inner cartons.

Packing Quantity: Minimum 200 to 1000 pieces per bag. Standard packing is 4 bags per inner carton and 10 inner cartons per outside carton.

6.2 Label Explanation

Labels on the packaging contain critical information for traceability and specification:

• CPN: Customer's Production Number
• P/N: Production Number (Part Number)
• QTY: Packing Quantity
• CAT: Ranks of Luminous Intensity (Brightness bin)
• HUE: Ranks of Dominant Wavelength (Color bin)
• REF: Ranks of Forward Voltage (Voltage bin)
• LOT No: Manufacturing Lot Number for traceability

7. Application Suggestions & Design Considerations

7.1 Typical Application Circuits

The most common drive method is using a series current-limiting resistor. The resistor value (R) can be calculated using Ohm's Law: R = (V_supply - V_F) / I_F. For a 5V supply and targeting I_F=20mA with a typical V_F of 2.0V: R = (5V - 2.0V) / 0.020A = 150 Ω. A resistor with a power rating of at least (5V-2.0V)*0.020A = 0.06W should be selected. For better stability over temperature and voltage variations, a constant-current driver is recommended.

7.2 Design Considerations

• Thermal Management: Ensure adequate PCB copper area or heatsinking if operating near maximum ratings or in high ambient temperatures.
• Optical Design: The wide 180-degree viewing angle makes it suitable for applications requiring broad illumination without secondary optics. For focused light, a lens may be needed.
• ESD Protection: Incorporate ESD protection diodes on sensitive signal lines if the LED is in a user-accessible area.
• Current Control: Never connect the LED directly to a voltage source without current limiting, as this will cause catastrophic failure.

8. Technical Comparison & Differentiation

While specific competitor comparisons are not provided in the datasheet, the 594SYGD/S530-E2's key differentiators based on its specifications are:

• Material Technology: Use of AlGaInP chip technology, which is efficient for producing high-brightness yellow-green to red wavelengths.
• Viewing Angle: A very wide 180-degree typical viewing angle offers excellent off-axis visibility compared to narrower-angle LEDs.
• Compliance: Full compliance with modern environmental standards (RoHS, REACH, Halogen-Free) is a significant advantage for products targeting global markets, especially Europe.

9. Frequently Asked Questions (FAQ)

Q1: What is the difference between Peak Wavelength (λp) and Dominant Wavelength (λd)?
A1: Peak Wavelength is the wavelength at which the emitted optical power is maximum. Dominant Wavelength is the single wavelength of monochromatic light that matches the perceived color of the LED. They are often close but not identical. For this LED, λp is 575 nm (Typ.) and λd is 573 nm (Typ.).

Q2: Can I drive this LED with a 3.3V supply?
A2: Yes. Using the formula with V_F=2.0V and I_F=20mA: R = (3.3V - 2.0V) / 0.020A = 65 Ω. Ensure the resistor power rating is sufficient (~0.026W).

Q3: Why is the storage condition (≤70% RH) important?
A3: Moisture can be absorbed by the epoxy package. During high-temperature soldering (reflow), this trapped moisture can vaporize rapidly, causing internal cracks or delamination ("popcorning"), leading to failure.

Q4: The datasheet shows a typical intensity of 8 mcd. Can I get brighter units?
A4: The luminous intensity is binned (CAT on the label). The typical value is a central point. You may receive parts from a higher bin (e.g., 10-12 mcd) or a lower bin (e.g., 4-6 mcd) depending on the ordered specification and manufacturing distribution. For consistent brightness, specify a tight binning requirement.

10. Practical Use Case Example

Scenario: Designing a status indicator for a network router.

1. Requirement: A bright, easily visible "Link Active" indicator.
2. Selection: The Brilliant Yellow Green color is highly visible. The 180° viewing angle ensures visibility from various angles.
3. Circuit Design: The router's main board provides a 3.3V digital I/O line. A 68 Ω, 1/10W resistor is placed in series with the LED. The microcontroller GPIO pin sources the current (20mA), which is within the capability of many modern MCUs. If not, a simple transistor driver circuit would be added.
4. Layout: The LED is placed on the front panel PCB. No special thermal management is needed as it operates well within its ratings in this low-duty-cycle indicator application.
5. Result: A reliable, compliant, and clearly visible status indicator is implemented.

11. Operating Principle Introduction

This LED operates on the principle of electroluminescence in a semiconductor p-n junction. The active region is made of AlGaInP. When a forward voltage is applied, electrons from the n-type region and holes from the p-type region are injected into the active region. When these charge carriers recombine, they release energy in the form of photons (light). The specific composition of the AlGaInP alloy determines the bandgap energy, which in turn dictates the wavelength (color) of the emitted light—in this case, Brilliant Yellow Green (~573-575 nm). The epoxy resin package serves to protect the semiconductor chip, act as a lens to shape the light output, and may contain phosphors or diffusers (in this case, it is diffused) to modify the color or viewing angle.

12. Technology Trends

The LED industry continues to evolve. While this is a standard AlGaInP lamp, broader trends influencing such components include:

• Increased Efficiency: Ongoing material and epitaxial growth improvements lead to higher luminous efficacy (more light output per electrical watt), allowing for lower operating currents or higher brightness.
• Miniaturization: The drive for smaller end-products pushes for LEDs in ever-smaller packages while maintaining or improving optical performance.
• Enhanced Reliability: Improvements in packaging materials and die-attach technologies are extending LED lifetimes and robustness against thermal cycling and humidity.
• Smart Integration: While this is a discrete component, a trend exists towards integrating control circuitry, protection, and even multiple colors (RGB) into single, smarter LED packages.
• Stringent Compliance: Environmental regulations like RoHS and REACH are becoming more comprehensive, making full compliance a baseline requirement for market access.