📌 Product Overview
The XL-2835UYC-02 from XINGLIGHT is a high-intensity Yellow SMD LED designed for automated surface-mount assembly. 💡 Housed in a compact 2.8x3.5x0.8mm package with a water-clear colloid, it targets applications requiring strong luminous intensity and a wide viewing angle.
While the component is ideal for flexible light strips and LCD backlights, successful implementation relies on managing its 60mA drive current within strict thermal boundaries. 👇 Designers must prioritize the package's thermal limits and ESD sensitivity to ensure long-term reliability in high-density lighting arrays.
💡 Typical Applications
Based on its optical characteristics and 2835 form factor, the XL-2835UYC-02 is optimized for the following scenarios:
- Indoor Illumination: Fluorescent tubes, residential light strips, and downlights.
- Commercial Signage: Advertising words and light boxes requiring consistent yellow color rendering.
- Backlighting: LCD display backlights where uniformity is critical.
- Decorative Lighting: Flexible light strips for ambient or accent lighting effects.
- Consumer Electronics: Indicator lights and status displays needing a compact footprint.
📊 Key Technical Specifications
🚀 The following electrical and optical characteristics are measured at Ta=25°C (Test Condition: IF=60mA).
| Parameter | Symbol | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Luminous Intensity | Iv | 550 | - | 800 | mcd |
| Dominant Wavelength | λd | 585 | 590 | 595 | nm |
| Peak Wavelength | λp | - | 590 | - | nm |
| Forward Voltage | VF | 1.8 | - | 2.4 | V |
| Viewing Angle | 2Ø1/2 | - | 120° | - | deg |
| Reverse Current | IR | - | - | ≤5 | μA |
✨ Design Note: The wide 120° viewing angle makes this component suitable for area lighting applications where light uniformity is preferred over focused spot beams.
⚠️ Absolute Maximum Ratings & Process Limits
🔒 Exceeding these ratings may cause device failure or permanent performance degradation. These limits are critical for risk control in power supply design and thermal management.
| Parameter | Symbol | Value | Unit | Notes |
|---|---|---|---|---|
| Max Power Dissipation | PD | 200 | mW | Derate above 25°C ambient |
| Max Continuous Forward Current | IF | 60 | mA | |
| Peak Forward Current | IFP | 150 | mA | Pulse width ≤0.1ms, Duty ≤1/10 |
| Max Reverse Voltage | VR | 5 | V | |
| ESD Ability | ESD | 2000 | V | Human Body Model (HBM) |
| Operating Temperature | TOPR | -40 ~ +85 | °C | |
| Storage Temperature | TSTR | -40 ~ +85 | °C |
⚠️ Warning: The Moisture Sensitivity Level (MSL) is 3. Components must be baked according to J-STD-033 if floor life is exceeded before reflow soldering to prevent popcorn cracking.
📦 Package, Dimensions & Assembly Notes
The XL-2835UYC-02 utilizes the industry-standard 2835 footprint (Outline: 2.8x3.5x0.8mm). This form factor allows for high-density placement on PCBs and flexible strips.
- Soldering Process: Compatible with Infrared Reflow soldering.
- Lead-Free Profile: Peak max temp 255°C (+0/-5°C), time above 217°C: 60-120s.
- Lead Process: Peak max temp 235°C (+5/-0°C), time above 183°C: 60-150s.
- Manual Soldering: Max 260°C for ≤6 seconds.
- Packaging: EIA standard compliant for SMT automatic production.
📈 Assembly Tip: Ensure the pick-and-place vacuum nozzles are calibrated for the 0.8mm height to avoid component tumbling or misalignment during high-speed placement.
🚢 Sourcing & Supply Considerations
When integrating the XL-2835UYC-02 into mass production, consider the following supply chain factors:
- Bin Sorting: Verify specific Brightness (E5-E7) and Voltage (N12-7 to N12-9) bin codes to ensure color and forward voltage consistency across batches.
- Authenticity: Source through authorized channels to guarantee ROHS compliance and avoid counterfeits with compromised thermal paths.
- Sample Availability: Request pre-production samples to validate thermal performance in your specific PCB layout.
- MSL Handling: Confirm that suppliers maintain proper dry packaging to preserve the Level 3 moisture integrity.
❓ FAQ
Q: What is the recommended drive current for maximum brightness? A: The typical test condition is 60mA. While the Absolute Maximum Rating allows for 60mA continuous, running at 50-55mA can significantly improve thermal performance and lifespan in high-density arrays.
Q: Can this LED be used in outdoor environments? A: The datasheet specifies indoor and commercial lighting. While the operating temperature range is wide (-40°C to +85°C), the package is not rated for UV exposure or direct water ingress. It requires an IP-rated enclosure for outdoor use.
Q: What does the "Water Colloid" specification mean? A: "Water Colloid" refers to the transparent epoxy resin encapsulating the chip. This ensures high light transmission efficiency, contributing to the 550-800 mcd luminous intensity.
Q: How critical is the ESD protection? A: With an antistatic ability of 2000V, standard handling precautions are required. Always use grounded wrist straps and ionizers during manual assembly to prevent latent damage.
Q: What is the difference between Dominant and Peak wavelength here? A: The Peak wavelength is 590nm (pure yellow). The Dominant wavelength ranges 585-595nm, accounting for how the human eye perceives the color shift. This ensures the yellow appears consistent across different bins.
Q: Is this component compatible with lead-free soldering profiles? A: Yes, it is rated for Lead-Free Infrared Reflow up to 260°C. However, note the specific peak temperature limits (Max 255°C) and duration above liquidus to prevent thermal shock.
