📌 Product Overview
The XL-3528UYC is a surface-mount device (SMD) LED from XINGLIGHT, housed in a standard 3.5x2.8mm package with a height of 1.9mm. It features a yellow luminous color with a transparent water-clear colloid, designed for high-efficiency light emission.
💡 This component is engineered specifically for SMT automatic production and infrared reflow soldering processes. It is fully compliant with RoHS environmental directives and features a Moisture Sensitivity Level (MSL) of 3, making it suitable for controlled assembly environments requiring reliable throughput.
🚀 Typical Applications
Based on its 120° viewing angle and optical intensity, the XL-3528UYC is optimized for diffuse lighting scenarios:
- Indoor & Auxiliary Lighting: Suitable for residential and commercial fixture backlights.
- Advertising & Signage: Ideal for luminous characters and advertising module lighting.
- Retail Display: Provides consistent color rendering for jewelry display cabinets and counter lighting.
- General Illumination: Effective for shop lighting and accent applications requiring compact form factors.
📉 Key Technical Specifications
The following table outlines the electro-optical characteristics ($T_a = 25^\circ C$), essential for circuit design and brightness consistency.
| Parameter | Symbol | Min. | Typ. | Max. | Unit | Conditions |
|---|---|---|---|---|---|---|
| Luminous Intensity | $I_v$ | 270 | - | 450 | mcd | $I_F = 20\text{mA}$ |
| Dominant Wavelength | $\lambda_d$ | 585 | - | 595 | nm | $I_F = 20\text{mA}$ |
| Forward Voltage | $V_F$ | 1.8 | - | 2.4 | V | $I_F = 20\text{mA}$ |
| Viewing Angle | $2\theta_{1/2}$ | - | 120 | - | deg | $I_F = 20\text{mA}$ |
✨ Design Note: Forward voltage grading codes (N12-7 to N12-9) allow for tighter binning, ensuring better current regulation in series arrays.
🔒 Absolute Maximum Ratings & Process Limits
Exceeding these parameters may result in permanent device failure. Design margins must account for these absolute limits ($T_a = 25^\circ C$).
| Parameter | Symbol | Max. Value | Unit | Notes |
|---|---|---|---|---|
| Max Power Dissipation | $P_D$ | 50 | mW | - |
| Max Continuous Forward Current | $I_F$ | 20 | mA | - |
| Peak Forward Current | $I_{FP}$ | 80 | mA | Pulse $\le 0.1\text{ms}$, Duty $\le 1/10$ |
| Max Reverse Voltage | $V_R$ | 5 | V | - |
| ESD Ability | ESD | 2000 | V | Human Body Model (HBM) |
| Operating Temperature | $T_{OPR}$ | -40 ~ +85 | $^\circ$C | - |
⚠️ Critical: The soldering temperature must not exceed 260°C for longer than 6 seconds to prevent package delamination.
🏗️ Package, Dimensions & Assembly Notes
- Dimensions: The outline measures 3.5mm (L) x 2.8mm (W) x 1.9mm (H).
- Packaging: Supplied in EIA standard packaging compatible with automated pick-and-place machines.
- Soldering Profile: Suitable for infrared reflow soldering.
- Lead-free Process: Peak temp $255^\circ$C (Time above $217^\circ$C: 60-120s).
- Lead Process: Peak temp $235^\circ$C (Time above $183^\circ$C: 60-150s).
- MSL Level:Level 3. Floor life is 168 hours at $30^\circ$C / 60% RH; bake before use if exposed to ambient moisture beyond this window.
📦 Sourcing & Supply Considerations
- Binning Options: Verify brightness (D8-E2) and voltage (N12-7/8/9) bin codes to ensure uniformity across large batches.
- Authenticity: Source through XINGLIGHT authorized channels to avoid mixed batches or non-compliant Rohs parts.
- Sample Evaluation: Request pre-production samples to validate the $V_F$ drop in your specific driver circuit before bulk ordering.
❓ FAQ
Q: What is the MSL rating of the XL-3528UYC? A: The XL-3528UYC has a Moisture Sensitivity Level (MSL) of 3. This means the components can be exposed to a factory floor life of 168 hours (1 week) at $30^\circ$C and 60% relative humidity before they must be reflowed or baked to remove moisture.
Q: What is the maximum current I can drive through this LED? A: The Max Continuous Forward Current is 20 mA. However, if using pulsed operation, you can apply a peak current of up to 80 mA, provided the pulse width is $\le 0.1\text{ms}$ and the duty cycle is $\le 10%$.
Q: What reflow soldering profile should I use for this component? A: It supports both lead and lead-free processes. For lead-free, peak temps should reach $255^\circ$C. For leaded processes, the peak is $235^\circ$C. Ensure the temperature does not exceed the absolute maximum rating of $260^\circ$C to prevent damage.
Q: How is the brightness graded? A: XINGLIGHT uses specific codes for luminous intensity. For example, code D8 ranges from 270-300 mcd, while E2 ranges from 400-450 mcd. Selecting a single bin code ensures visual uniformity in your final product.
Q: What is the forward voltage range? A: At 20 mA, the forward voltage ($V_F$) ranges from 1.8V to 2.4V. It is further binned into groups like N12-7 (1.8-2.0V), N12-8 (2.0-2.2V), and N12-9 (2.2-2.4V) for tighter matching.
