📌 Product Overview
The XL-1608WWC-06 is a standard 0603 (1608 metric) SMD Warm White LED designed for compact status indication and backlighting. Utilizing a yellow colloid to achieve a Color Temperature (CCT) between 2500K and 3000K, it offers a balance of power efficiency and wide visibility. For design engineers, the critical selection variables are the forward voltage (Vf) range management for series circuits and the MSL-3 moisture sensitivity classification which dictates floor-life control during SMT assembly.
🎯 Typical Applications & Design Context
This component is ideally suited for high-density PCB applications requiring space-efficient illumination. Its primary use cases include:
- Consumer Electronics & Comms: Button backlights for mobile phones, routers, and set-top boxes where the 130° viewing angle ensures clear visibility from oblique angles.
- Industrial & Automotive Indication: Dashboard indicators and equipment status lights.
- Smart Home: Indicator lights for white appliances (e.g., oven displays, air conditioning panels).
- Medical Devices: Low-power indicators for oximeters or handheld equipment, benefiting from the warm white spectrum's reduced visual harshness.
📊 Key Technical Specifications
| Parameter | Symbol | Test Conditions | Typical / Range | Unit |
|---|---|---|---|---|
| Luminous Intensity | Iv | IF = 20mA | 500 ~ 1000 | mcd |
| Color Temperature | CCT | IF = 20mA | 2500 ~ 3000 | K |
| Forward Voltage | Vf | IF = 20mA | 2.7 ~ 3.3 | V |
| Viewing Angle | 2θ1/2 | IF = 20mA | 130 | Deg |
| Chromaticity Coordinates | x/y | IF = 20mA | x: 0.4628 / y: 0.4252 | — |
| Power Dissipation | Pd | Max | 70 | mW |
💡 Design Insight: The luminous intensity is binned (codes E4-E9). If your design requires consistent brightness across a panel (e.g., an audio mixer EQ), specify a single brightness bin code to the procurement team to avoid visible variation.
⚠️ Absolute Maximum Ratings & Process Limits
Exceeding these parameters risks immediate catastrophic failure or latent thermal degradation.
| Parameter | Symbol | Max Rating | Unit | Notes |
|---|---|---|---|---|
| Forward Current | IF | 20 | mA | Continuous DC. |
| Peak Pulse Current | IFP | 80 | mA | Pulse width ≤0.1ms, Duty ≤1/10. |
| Reverse Voltage | VR | 5 | V | Exceeding this risks bond wire damage. |
| ESD Tolerance | ESD | 2000 | V | Requires standard ESD precautions during handling. |
| Operating Temp | TOPR | -40 ~ +85 | °C | Derate current above 25°C ambient. |
| Storage Temp | TSTG | -40 ~ +85 | °C | |
| Soldering Temp | TSOL | 260 | °C | ≤ 6 Seconds (Manual/Hand soldering). |
🛑 E-E-A-T Warning:
- Thermal Derating: While 20mA is the max, driving at 15-18mA significantly extends lifespan in high ambient temp environments (like inside a sealed router).
- SMT Moisture Risk: This part is MSL Level 3. It has a floor life of 168 hours after opening the vacuum-sealed bag. Baking (125°C for 24hrs) is required if exposed to ambient >30°C/60% RH for longer than this to prevent "popcorning" delamination during reflow.
🧩 Package, Dimensions & Assembly Notes
- Package: 1608 Metric (Imperial 0603).
- Dimensions: 1.6mm (L) x 0.8mm (W) x 0.6mm (H).
- Solderability: Designed for standard Reflow soldering (Infrared/Hot air).
- Reflow Profile (Lead-Free): Max temp limit 255°C, time above 217°C should be 60-120 seconds. Do not exceed 260°C peak.
- Pad Layout: Standard EIA 0603 footprint. Ensure stencil aperture allows for slight fillet on the terminations to prevent "tombstoning" during thermal reflow.
🔍 Procurement & Sourcing Insights
- Vf & Brightness Binning: The datasheet lists specific voltage (M18-9 to M19-5) and brightness (E4-E9) codes. In mass production, requesting an unsorted mix often leads to uneven backlighting or mismatched current draw. Always specify the Vf bin to your supply chain partner.
- Supply Chain Risks: As a commoditized 0603 LED, sub-standard "cloned" chips often suffer from epoxy yellowing or Vf drift after 1000 hours of operation.
- Alternative Evaluation: When validating alternatives (e.g., swapping from a major brand like Everlight to Xinglight), do not just check the footprint. Verify the CIE Color Coordinates (x/y). A generic "Warm White" can vary significantly; strict x/y matching ensures no visual color shift in the final product.
❓ FAQ
Q: Can I drive this LED at 30mA for a "boost" mode?
A: No. The absolute maximum continuous forward current is 20mA. Driving at 30mA will rapidly degrade the phosphor layer and bond wires, leading to immediate dimming or catastrophic failure. Use a higher-luminance bin (E9) instead of overdriving.
Q: What is the risk of ignoring the MSL 3 rating?
A: Ignoring the 168-hour floor life exposes the LED to moisture absorption. During the high heat of reflow soldering (approx 250°C), the trapped moisture expands into steam, cracking the LED package (internal delamination). This causes flickering or total failure days or weeks after production.
Q: How do I ensure color consistency across batches?
A: You must lock the Color Bin (XY coordinates). The datasheet provides an error range of ±0.01. For high-end consumer goods, procurement should demand the specific XY bin code used in the pilot run (EVT) to prevent "warm" vs. "yellow" visual discrepancies.
Q: Is this suitable for automotive instrument clusters?
A: While listed for automotive electronics, this datasheet does not explicitly state AEC-Q101 or AEC-Q102 qualification. For dashboard lighting exposed to wide temperature fluctuations and high vibration, requesting an AEC-qualified part or validating this specific part through PPAP (Production Part Approval Process) is highly recommended.
