📌 Product Overview
The XL-HD3535WWC is a high-brightness Warm White SMD LED integrated into a compact 3.5x3.5x2.0mm package. 💡 Designed for applications requiring intense luminous flux in restricted spaces, this component utilizes a transparent water colloid to maximize light output while maintaining a wide viewing angle of 130 degrees. It is engineered primarily for battery-powered portable devices where power dissipation and thermal management are critical constraints.
Key design considerations include its robust thermal performance, supporting an operating temperature range of -40°C to +105°C, and compliance with ROHS standards. This component is suitable for high-density PCB layouts requiring reliable, long-life illumination solutions.
🚀 Typical Applications
Based on the datasheet parameters, the XL-HD3535WWC is optimized for high-drain, intermittent, or continuous lighting scenarios:
- Mobile Camera Flash: Specifically designed for strobe or flash functions in smartphones and mobile devices.
- Digital Video (DV) Lighting: Effective as a flashlight or auxiliary light source for digital video recording.
- Signaling and Indicators: High-intensity signal lights and symbol illumination.
- General Illumination: Interior and exterior lighting for automotive or consumer electronics.
- Decorative Lighting: Entertainment and ambient lighting applications requiring warm white tones (2800K-3300K).
📊 Key Technical Specifications
The following table outlines the electro-optical characteristics under standard test conditions ($T_a=25^\circ C$).
| Parameter | Symbol | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Luminous Flux | $\Phi$ | $I_F=350mA$ | 80 | - | 120 | LM |
| Color Temperature | $T_c$ | $I_F=350mA$ | 2800 | - | 3300 | K |
| Forward Voltage | $V_F$ | $I_F=350mA$ | 2.8 | - | 3.4 | V |
| CRI (Ra) | $R_a$ | $I_F=350mA$ | - | 70 | - | - |
| Half-Intensity Angle | $2\theta_{1/2}$ | $I_F=350mA$ | - | 130 | - | Deg |
| Reverse Current | $I_R$ | $V_R=5V$ | - | - | 10 | $\mu A$ |
⚠️ Note: Binning codes (K1-K4 for Flux, N13 for Voltage, WW for CCT) are available for strict color and brightness consistency control in mass production.
🔒 Absolute Maximum Ratings & Process Limits
Exceeding these ratings may cause permanent device failure. 👇 These limits are crucial for designing protection circuits and thermal management systems.
| Parameter | Symbol | Value | Unit | Notes |
|---|---|---|---|---|
| Power Dissipation | $P_D$ | 1000 | mW | $T_a=25^\circ C$ |
| Forward Current | $I_F$ | 350 | mA | DC Continuous |
| Peak Forward Current | $I_{FP}$ | 700 | mA | Pulse width $\le 0.1ms$, Duty $\le 1/10$ |
| ESD Capability | $ESD$ | 3000 | V | Human Body Model (HBM) |
| Operating Temperature | $T_{opr}$ | -40 to +105 | $^\circ C$ | |
| Storage Temperature | $T_{stg}$ | -40 to +85 | $^\circ C$ | |
| Lead Soldering Temp | $T_{sol}$ | 260 | $^\circ C$ | $\le 6$ Seconds |
⚠️ Critical Risk: Ensure the junction temperature is managed effectively during peak pulse operation (700mA) to prevent lumen depreciation.
📦 Package, Dimensions & Assembly Notes
- Outline Dimensions: $3.5 \times 3.5 \times 2.0$ mm.
- Tolerance: $\pm 0.25$ mm unless otherwise noted.
- Moisture Sensitivity:MSL Level 3. Floor life is < 168 hours at $30^\circ C$/60% RH. Baking is required if exposed beyond this limit.
- Soldering Guidelines:
- Hand Soldering: Recommended for repair only. Use iron $< 30W$ at $< 300^\circ C$ for $< 3$ seconds per terminal.
- Reflow Soldering: Recommended max peak temperature is $240 \pm 5^\circ C$ for 6 seconds. Avoid mechanical stress on the LED during heating.
- Reflow Cycles: Do not exceed 2 reflow cycles.
🚚 Sourcing & Supply Considerations
- Binning Selection: Verify specific bin codes (Flux, Voltage, Color) with the supplier to ensure batch-to-batch consistency.
- MSL Compliance: Confirm storage and handling protocols strictly follow MSL Level 3 to prevent popcorning during reflow.
- Authenticity: Source only through authorized channels to guarantee ROHS compliance and reliability specifications.
- Samples: Request samples with specific grading codes to validate optical performance in your actual housing/lens assembly.
❓ Frequently Asked Questions
Q: What is the maximum current I can drive the XL-HD3535WWC with?
A: The absolute maximum continuous forward current is 350 mA. However, for pulse applications (like a camera flash), it can withstand a peak current of 700 mA, provided the pulse width is $\le 0.1ms$ and the duty cycle is $\le 10%$.
Q: What are the storage requirements to prevent damage before assembly?
A: The component has a Moisture Sensitivity Level (MSL) of 3. It must be used within 168 hours (1 week) of opening the vacuum-sealed bag. If not used within this time, the components must be baked at specific conditions to remove moisture before reflow soldering.
Q: Can I use this LED for general lighting fixtures?
A: While designed for mobile flashes, the XL-HD3535WWC produces 80-120 Lumens of warm white light (2800K-3300K) at 350mA. It is suitable for low-power accent lighting, decorative fixtures, or task lights, but thermal management must be validated to keep the junction temperature within safe limits.
Q: What precautions should I take during reflow soldering?
A: The recommended peak temperature is $240 \pm 5^\circ C$ for a maximum of 6 seconds. Do not perform more than 2 reflow cycles. Crucially, avoid applying any mechanical stress or pressure to the LED body while the solder paste is molten to prevent cracking the die or wire bonds.
Q: How do I interpret the brightness binning codes?
A: The datasheet categorizes luminous flux into bins K1 through K4.
- K1: 80-90 LM
- K2: 90-100 LM
- K3: 100-110 LM
- K4: 110-120 LM
Select the appropriate bin code to match your brightness requirements and ensure uniformity across your product line.
