📌 Product Overview
The XL-3528BGWC is a high-brightness SMD LED from XINGLIGHT, featuring an Ice Blue luminous color (approx. 470-485nm based on coordinates) encapsulated in a light yellow colloid. 💡 With a compact 3.5x2.8mm footprint, this component is engineered for automated SMT production, specifically utilizing infrared reflow soldering processes.
While the nominal 20mA drive current suggests simple integration, the Moisture Sensitivity Level (MSL) of 3 demands strict handling protocols to prevent popcorning during soldering. 👇 Designers must focus not only on the optical output but also on the thermal management during the IR reflow process to ensure long-term reliability in indoor lighting applications.
🚀 Typical Applications
Based on its 120-degree viewing angle and ice white/blue color temperature, the XL-3528BGWC is optimized for applications requiring wide-angle illumination and high contrast.
- Indoor & Auxiliary Lighting: Ideal for general illumination and backlighting where space is constrained.
- Advertising & Signage: 💡 Suitable for advertising modules and luminescent characters due to high luminous intensity.
- Retail Displays: Effective for jewelry display cabinets and counter lighting to enhance product appearance.
- Ambient Lighting: Used in shop lighting systems to create a specific atmosphere.
📈 Key Technical Specifications
The following electrical and optical characteristics are measured at standard conditions (Ta=25°C, IF=20mA).
| Parameter | Symbol | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Luminous Intensity | Φ | 4.0 | - | 6.0 | LM |
| Forward Voltage | VF | 2.8 | - | 3.4 | V |
| Viewing Angle | 2θ1/2 | - | 120 | - | Deg |
| Reverse Current | IR | - | - | 5.0 | μA |
| Power Dissipation | PD | - | - | 70 | mW |
| Chromaticity (x) | X | - | 0.17 | - | - |
| Chromaticity (y) | Y | - | 0.16 | - | - |
💡 Note: The "Ice Blue" designation corresponds to specific chromaticity coordinates (Bin 1# & 2#) centered around x=0.177 and y=0.159. Ensure your driver circuit can supply a stable forward voltage within the 2.8V–3.4V range to maintain color consistency.
🔒 Absolute Maximum Ratings & Process Limits
Exceeding these ratings may cause permanent damage or significantly reduce reliability. 👇 These limits are critical for designing robust protection circuits.
| Parameter | Symbol | Max. Value | Unit | Conditions |
|---|---|---|---|---|
| Max Forward Current | IF | 20 | mA | Continuous |
| Peak Forward Current | IFP | 80 | mA | Pulse ≤ 0.1ms, Duty ≤ 1/10 |
| Max Reverse Voltage | VR | 5 | V | - |
| Power Dissipation | PD | 70 | mW | - |
| ESD Ability | ESD | 2000 | V | Human Body Model |
| Operating Temp. | TOPR | -40 ~ +85 | °C | - |
| Storage Temp. | TSTR | -40 ~ +85 | °C | - |
⚠️ Critical Warning: The component is rated MSL 3. Floor life is limited to 168 hours (one week) after opening the sealed bag before baking is required. This is a major supply chain consideration for high-volume production.
🏗️ Package, Dimensions & Assembly Notes
- Outline Dimensions: 3.5mm (L) x 2.8mm (W) x 1.9mm (H).
- Packaging: EIA standard compliant for automated pick-and-place.
- Soldering: Compatible with Infrared Reflow profiles.
🔥 Recommended Soldering Profile (Lead-Free)
To prevent thermal shock and delamination, adhere strictly to these limits derived from J-STD-020C:
| Phase | Parameter | Limit |
|---|---|---|
| Peak Temp | Max Temperature | 255°C (+0/-5°C) |
| Time Above 217°C | t (Liquidous) | 60 ~ 120 seconds |
| Soak (Pre-heat) | 175°C (±25°C) | Max 180 seconds |
| Ramp Rate | Heat up / Cool down | Max 3°C/s / 6°C/s |
💡 Design Tip: The pad layout should accommodate the 3.5mm length to ensure sufficient wetting during the soldering process, especially given the moisture sensitivity constraints.
📦 Sourcing & Supply Considerations
- MSL Management: Verify that your supplier stores components in a dry cabinet and provides vacuum-sealed packaging with moisture indicator cards. 💡 Improper storage can lead to failure during reflow.
- Bin Consistency: For large installations (like jewelry cabinets), request批次 consistency for Chromaticity (Bin #) and Voltage (N13 codes) to avoid visible color or brightness variations.
- Sample Availability: Always request pre-production samples to verify the "Ice Blue" color temperature matches your specific design intent, as perceived color can vary by angle.
- Authenticity: Source exclusively through authorized channels to ensure ROHS compliance and avoid counterfeits that lack the specified ESD protection.
❓ FAQ
Q: What does MSL 3 mean for my assembly line? A: MSL 3 (Moisture Sensitivity Level 3) means the components must be soldered within 168 hours (1 week) of opening the vacuum-sealed bag. If exposed to ambient air longer, they must be baked at 125°C for a specified time (usually 24-48 hours) to remove absorbed moisture before 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. Exceeding this will rapidly degrade the junction or cause catastrophic failure. Use a constant current driver limited to 20mA.
Q: What is the difference between the N13-3, N13-4, and N13-5 codes? A: These are voltage grading bins. N13-3 ranges from 2.8V-3.0V, N13-4 is 3.0V-3.2V, and N13-5 is 3.2V-3.4V. 👇 Grouping LEDs by these codes ensures uniform brightness when driven in a series string.
Q: Is this LED suitable for outdoor signage? A: While the datasheet lists "Luminescent characters" as an application, the storage and operating temperature range is -40°C to +85°C. For outdoor use, you must ensure the IP rating of the final housing protects the internal components from direct water ingress and UV exposure, as the LED itself is not inherently waterproof.
Q: How do I verify the "Ice Blue" color? A: Refer to the Chromaticity Coordinates (x=0.17, y=0.16). 💡 It is highly recommended to build a prototype sample first, as the "Ice Blue" perception can vary depending on the diffuser material used in your lighting module.
