📌 Product Overview
The XINGLIGHT XL-3528UGC is a high-performance Surface Mount Device (SMD) LED designed for general illumination and indicator applications. 💡 Housed in a compact 3.5x2.8mm package with a water-clear colloid, it features a dominant wavelength of 520nm (Green) and a wide viewing angle of 120°, making it ideal for even light distribution.
👇 Design focus must shift beyond just luminous intensity. To ensure reliability in indoor lighting and signage, engineers must rigorously manage the 20mA drive current and respect the Moisture Sensitivity Level (MSL) of 3 to prevent moisture-induced damage during infrared reflow soldering.
🚀 Typical Applications
Based on its 120° viewing angle and high luminous intensity (up to 1800mcd), the XL-3528UGC is optimized for diffuse lighting scenarios where visual consistency is key.
- Indoor & Auxiliary Lighting: Ideal for residential fixtures and task lighting.
- Commercial Display: Effective for jewelry display cabinets and shop lighting to enhance product appearance.
- Signage & Advertising: Suitable for luminescent characters and advertising modules requiring uniform green light emission.
- Backlighting: Used in indicator lights and switch backlights.
📊 Key Technical Specifications
⚡ The performance window is defined by the following optical and electrical characteristics at 25°C. Designers should use the "Typical" values for baseline calculations but ensure systems can handle "Max" variances.
| Parameter | Symbol | Min. | Typ. | Max. | Unit | Test Conditions |
|---|---|---|---|---|---|---|
| Luminous Intensity | Iv | 1000 | 1600 | 1800 | mcd | IF = 20mA |
| Dominant Wavelength | λd | 510 | 520 | 530 | nm | IF = 20mA |
| Forward Voltage | VF | 2.8 | - | 3.4 | V | IF = 20mA |
| Viewing Angle | 2Ø1/2 | - | 120 | - | deg | IF = 20mA |
| Reverse Current | IR | - | - | ≤ 5 | μA | VR = 5V |
🔒 Absolute Maximum Ratings & Process Limits
🚨 Exceeding these parameters risks immediate failure or permanent degradation. These limits are the critical boundaries for your drive circuitry and PCB thermal design.
| Parameter | Symbol | Max. Value | Unit | Notes |
|---|---|---|---|---|
| Max Power Dissipation | PD | 70 | mW | @ 25°C |
| Max Continuous Forward Current | IF | 20 | mA | Derate above 25°C |
| Peak Forward Current | IFP | 80 | mA | Pulse ≤ 0.1ms, Duty ≤ 1/10 |
| Max Reverse Voltage | VR | 5 | V | |
| ESD Ability | ESD | 2000 | V | Human Body Model |
| Operating Temperature | TOPR | -40 ~ +85 | °C | |
| Storage Temperature | TSTR | -40 ~ +85 | °C |
📦 Package, Dimensions & Assembly Notes
The XL-3528UGC utilizes the industry-standard 3528 footprint (3.5x2.8x1.9mm), ensuring compatibility with most SMT pick-and-place equipment.
- Soldering Process: Compatible with both Lead and Lead-free infrared reflow.
- Lead-free: Peak temp 255°C, time above 217°C: 60-120s.
- Lead: Peak temp 235°C, time above 183°C: 60-150s.
- Moisture Sensitivity: Classified as MSL 3.
- ⚠️ Requirement: Floor life at <30°C/60% RH is 168 hours. If exceeded, baking is required (Standard: 125°C for 24-48 hours based on J-STD-020) to prevent "popcorning" or delamination during soldering.
- Packaging: EIA standard compliant for automated tape feeding.
🛒 Sourcing & Supply Considerations
To guarantee supply chain stability and product authenticity for the XL-3528UGC, consider the following factors:
- Bin Selection: Verify specific sorting codes for Brightness (F1-F5), Voltage (N13), and Wavelength (HG01-04) to ensure color consistency in your batch.
- Sample Evaluation: Always request samples from the current lot to validate color temperature and intensity against your specific driver circuit.
- Authenticity: Source exclusively through XINGLIGHT authorized channels to avoid counterfeit components that may fail reliability testing.
- Lead Time: Plan for standard SMD lead times, especially for tightly binned specific wavelength grades.
❓ Frequently Asked Questions (FAQ)
Q: What is the recommended storage method to prevent damage before assembly? A: Store the LEDs in a sealed dry cabinet or moisture barrier bag with desiccant. Since the MSL is 3, you must bake the components if they have been exposed to the factory floor for more than 168 hours (1 week) prior to reflow soldering.
Q: Can I drive this LED at 30mA for higher brightness? A: No. The Absolute Maximum Rating for continuous forward current is 20mA. Driving it at 30mA will likely accelerate thermal degradation, shorten lifespan, or cause immediate catastrophic failure. Keep pulse currents under 80mA.
Q: Why does the datasheet mention "Water Clear Colloid"? A: This refers to the transparent epoxy encapsulation. It maximizes light output efficiency. Unlike diffused lenses, this provides a higher luminous intensity but requires careful optical design if you need to blend the light or soften the hot spot.
Q: How do I choose the correct brightness bin code? A: The XL-3528UGC is graded F1 through F5. For uniform lighting in a large array (like a advertising module), you must select LEDs from the same bin code (e.g., all F4) to avoid visible patches of brighter or dimmer light.
Q: What is the tolerance for the Forward Voltage? A: The Forward Voltage (VF) ranges from 2.8V to 3.4V at 20mA. Your driver design must accommodate this variance, or you should group LEDs by Voltage Bin (N13-3 to N13-5) to ensure consistent current distribution in series strings.
Q: Is this component RoHS compliant? A: Yes, the datasheet explicitly states that the environmental protection process complies with the ROHS Directive, making it suitable for markets with strict hazardous substance restrictions.
