📌 Product Overview
The SF-COB Series comprises high-performance COB (Chip-on-Board) flexible light strips engineered to eliminate light spots while delivering high Color Rendering Index (CRI ≥90) output. 🏭 These devices integrate multiple LED chips directly onto the substrate to provide a continuous, uniform light-emitting surface, distinguishing them from traditional discrete SMD LED strips.
Target applications include architectural cove lighting, cabinet illumination, and commercial accent lighting. The series offers a wide voltage range (5V, 12V, 24V, and 220V) and diverse densities (528 to 640 chips/meter) to accommodate varying power budget and brightness requirements. Design focus remains on thermal dissipation, flexible PCB durability, and compatibility with standard control protocols.
🛠 Typical Applications
Based on the high chip density and CRI specifications, the SF-COB Series is optimized for the following scenarios:
- Architectural & Ambient Lighting: Ideal for coves, cornices, and recessed ceiling areas where continuous linear light without dotting effects is required.
- Commercial Display & Cabinetry: High CRI (≥90) ensures accurate color rendering for retail merchandise and under-cabinet task lighting.
- Accent & Signage: The 5V low-voltage models (e.g., SF-COB-Y-W640D-V010) are suitable for battery-powered or tight-signage applications.
- Industrial & Utility: The 220V high-voltage variants (e.g., SF-COB-YW296D-V38) allow for long-run installations without significant voltage drop concerns.
📊 Key Technical Specifications
| Parameter | Specification / Range |
|---|---|
| Model Series | SF-COB-Y-W / SF-COB-WW (Warm White) |
| LED Density | 296 – 640 Chips per Meter |
| Color Rendering Index (CRI) | ≥ 90 (Typical) |
| Power Consumption | 10W/m – 20W/m |
| Input Voltage | 5V DC, 12V DC, 24V DC, 220V AC |
| Strip Width | 5mm, 8mm, 10mm |
| Control Type | APP / Switch / Voice Control (IC Integrated) |
| Waterproof Rating | IP20 (Non-waterproof, Indoor Use) |
💡 Design Insight: The high density (up to 640 chips/m) necessitates careful consideration of the strip width (8mm/10mm) to ensure sufficient surface area for heat dissipation, particularly when running at maximum power density (20W/m).
⚠ Absolute Maximum Ratings & Process Limits
To ensure reliability and prevent premature failure, the following electrical and physical limits must be observed during system integration:
| Parameter | Rating / Limit |
|---|---|
| Storage Temperature | -40°C to +100°C |
| Operating Temperature | -25°C to +60°C (Dependent on installation) |
| Input Voltage Tolerance | ±10% of Rated Voltage (e.g., 12V models: 10.8V - 13.2V) |
| Bending Radius | Minimum radius typically > 20mm to avoid PCB delamination |
| Soldering/Connection | Use supplied connectors or quick soldering; avoid prolonged heat exposure |
🔒 Risk Mitigation: Exceeding the recommended voltage (e.g., using 24V on a 12V strip) will cause immediate thermal runaway and LED failure. For the 220V AC models, strict isolation and adherence to high-voltage safety regulations are mandatory during installation.
📦 Package, Dimensions & Assembly Notes
The SF-COB series utilizes a flexible FPC (Flexible Printed Circuit) construction with widths varying by model (5mm, 8mm, or 10mm).
- Cutting Intervals: The strips feature specific cutting points ranging from 13.16mm to 45mm depending on the voltage and chip density. ⚠️ Critical: Cutting outside designated lines will result in circuit failure for that segment.
- PCB Width: Higher density strips (e.g., 640 chips/m) generally utilize an 8mm or 10mm width to accommodate the closer pitch of the COB modules.
- Mounting: The strips feature an adhesive backing for surface mounting. The substrate must be clean, dry, and flat. For high-power models (14W-20W/m), an aluminum profile is strongly recommended to act as a heatsink, extending the lifespan beyond 50,000 hours.
🚢 Sourcing & Supply Considerations
When integrating the SF-COB series into BOMs (Bill of Materials), consider the following supply chain factors:
- Voltage & Density Coding: The part numbers (e.g., SF-COB-Y-W608D-V18) encode voltage (V18=12V) and density (608). Verify these suffixes strictly to avoid supply mismatches.
- Sample Verification: Always request a sample batch of the specific P/N to verify the color temperature (CCT) and CRI consistency, as "Warm White" (WW) and standard "Y" (Yellow/Warm) bins may vary visually.
- Packaging & Logistics: These flexible strips are susceptible to physical crushing. Ensure packaging integrity upon receipt.
❓ Frequently Asked Questions
Q: Can the 5V COB strips be run for long distances? A: No. Due to high resistance, 5V strips (like the SF-COB-Y-W640D-V010) experience significant voltage drop. They should be powered from both ends or limited to runs under 2 meters to maintain brightness uniformity.
Q: What is the difference between the "2-wire" and "3-wire" configurations listed? A: The wire configuration typically relates to the control IC integrated into the strip. 3-wire models often support more complex dual-channel or addressable control signals (APP/Voice), whereas 2-wire models are typically single-color dimming.
Q: Are these COB strips suitable for outdoor use? A: The datasheet lists an IP20 rating. This indicates no protection against water ingress. For outdoor or humid environments, these strips must be installed inside an aluminum channel with a silicone diffuser and IP67/68 coating, or a different IP-rated product should be sourced.
Q: How do I choose between 12V, 24V, and 220V versions? A: 12V is safer for DIY/small spaces but suffers voltage drop. 24V is the industry standard for balancing efficiency and brightness. 220V is used for long-run architectural installations where constant current drivers are impractical, though safety risks are higher.
Q: What does "CRI ≥90" imply for energy efficiency? A: A high CRI generally requires more phosphor conversion, which can slightly reduce raw luminous efficacy (lumens per watt) compared to CRI 80 strips. However, the perceived brightness and color accuracy are significantly superior, often allowing for lower total wattage to achieve the same visual comfort.
