📌 Product Overview
The XL-2835WWC-1W-9V from XINGLIGHT is a high-voltage 9V Warm White SMD LED in the standard 2835 form factor (2.8mm x 3.5mm). Designed for series-reduced circuit architectures, this component integrates an integrated circuit regulator to achieve a 9V forward voltage (Vf) at 150mA. It is ideally suited for linear LED strips, downlights, and LCD backlights where space efficiency meets the need for higher voltage handling. For engineering teams, the critical selection variables are the Vf variance (±0.3V) and the stringent moisture sensitivity (MSL 3) requirements during assembly.
🎯 Typical Applications & Design Context
- High-Voltage Linear Strips: Perfect for flexible strip designs where 9V operation allows fewer cut points and simpler driver topology compared to low-voltage 3V LEDs.
- Commercial Downlights & Bulbs: Suitable for enclosed fixtures due to its compact 0.8mm height profile and 120-degree viewing angle.
- LCD Backlighting: Provides consistent warm white illumination (2700K-3400K) with a CRI of 80, essential for display readability.
- Advertising Lightboxes: Utilizes the 120lm output (typical) for uniform signage illumination.
📊 Key Technical Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions |
|---|---|---|---|---|---|---|
| Luminous Flux | Φ | 100 | - | 140 | LM | IF = 150mA |
| Forward Voltage | Vf | 8.7 | - | 9.3 | V | IF = 150mA |
| Color Temperature | CCT | 2800 | 3000 | 3400 | K | IF = 150mA |
| Viewing Angle | 2θ1/2 | - | - | 120 | Deg | IF = 150mA |
| Reverse Current | Ir | - | - | 5 | μA | VR = 5V |
⚠️ Absolute Maximum Ratings & Process Limits
| Parameter | Symbol | Value | Unit | Notes |
|---|---|---|---|---|
| Max Forward Current | IF | 150 | mA | Exceeding this causes rapid thermal degradation. |
| Peak Pulse Current | IFP | 200 | mA | Pulse width ≤0.1ms, Duty ≤1/10. |
| Power Dissipation | PD | 1350 | mW | Dependent on PCB copper area for heatsinking. |
| ESD Capability | ESD | 2000 | V | Requires proper grounding during handling. |
| Operating Temp | TOPR | -40 ~ +85 | °C | Performance degrades above 85°C ambient. |
💡 Engineering Insight: While the power dissipation is rated at 1350mW, this is theoretical. In a sealed luminaire, operating at 150mA continuously without adequate heatsinking will likely push the junction temperature beyond safe limits, accelerating lumen depreciation. Always verify thermal resistance in your specific mechanical enclosure.
🧩 Package, Dimensions & Assembly Notes
- Package Type: 2835 SMD (Surface Mount Device)
- Dimensions: 2.8mm (L) x 3.5mm (W) x 0.8mm (H)
- Soldering: Suitable for Infrared Reflow process.
- 🔒 Moisture Sensitivity:MSL Level 3.
- Floor Life: 168 hours (1 week) after opening the sealed bag.
- Baking Required: If exposed >168 hours, bake at 80°C for 24 hours (standard Lead-free drying) to prevent popcorning/cracking during reflow.
- Reflow Profile: Peak temp 255°C (Lead-free), max 6°C/sec cooling rate to prevent thermal shock.
🔍 Procurement & Sourcing Insights
- Vf Binning Risks: The datasheet specifies two Vf bins (S13-3: 8.7-9.0V and S13-4: 9.0-9.3V). Mixing these bins in a single series string will cause current imbalance and brightness variation. Procurement must enforce single-bin purchasing.
- CRI & Brightness Correlation: Higher output bins (K5/K6: 120-140lm) may have slight variations in Color Rendering Index (CRI). For architectural lighting, request the CRI test report for the specific brightness bin.
- Counterfeit Alert: Given the generic "2835" footprint, verify the packaging ESD warning labels and MSL ratings. Non-compliant parts often lack the moisture barrier integrity required for MSL 3 components.
❓ FAQ
Q: Can I drive this LED at 200mA for higher brightness?
A: No. The Absolute Maximum Continuous Forward Current is 150mA. Driving it at 200mA continuously will permanently damage the chip. The 200mA rating is strictly for pulsed operations (≤0.1ms).
Q: What happens if I mix S13-3 and S13-4 bins on the same PCB?
A: In a constant current driver scenario, the LED with the lower Vf (S13-3) will hog more current, potentially overheating and failing prematurely, while the S13-4 bin may appear dimmer. Strict bin segregation is required for series strings.
Q: The storage temperature range is -40°C to +85°C. Does this apply to operating conditions?
A: Partially. The storage and operating temperature ranges are listed similarly (-40~+85°C), but operating at +85°C ambient requires significant derating of the drive current to maintain reliability.
Q: Is this component compatible with pick-and-place machines?
A: Yes, it utilizes EIA standard packaging and is suitable for SMT automatic production. However, due to MSL 3, ensure your pick-and-place environment humidity is controlled (<60% RH) if the bags are open for more than 1 week.
