LED Lighting

LED Lighting - White

Part Number	Description / PDF	Quantity
SM4014UWDN02 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM4014, 0.2W	0
SM5730UWDC05 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM5730, 0.5W	0
SM3527UWDC01 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM3527, 0.1W	0
SME2014UWDN05 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SME2014, 0.5	5000
SM4014UWDC02 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM4014, 0.2W	0
SME3030UWDN10 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SME3030, 1.0	0
SM5730UWDW05 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM5730, 0.5W	0
SM3527UWDW01 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM3527, 0.1W	0
SME3030UWDC10 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SME3030, 1.0	0
SME3030UWDW10 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SME3030, 1.0	0
SM2835UWDW02 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM2835, 0.2W	0
SME2014UWDW05 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SME2014, 0.5	4990
SME2014UWDC05 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SME2014, 0.5	0
SM3527UWDN01 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM3527, 0.1W	0
SM4014UWDW02 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM4014, 0.2W	0
SM5730UWDN05 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM5730, 0.5W	0
SM2835UWDN02 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM2835, 0.2W	0
SM2835UWDC02 Califia Lighting (Bivar)	LED, SURFACE MOUNT, SM2835, 0.2W	0

LED Lighting - White

1. Overview

White Light-Emitting Diodes (LEDs) are semiconductor devices that convert electrical energy into visible white light. They represent a fundamental shift from traditional lighting technologies due to their energy efficiency, longevity, and controllability. Modern white LEDs primarily use blue-emitting chips coated with phosphor materials to produce broad-spectrum white light, enabling precise color tuning and dimming capabilities.

2. Major Types & Functional Classification

Type	Functional Features	Application Examples
Blue Chip + Yellow Phosphor	Cost-effective, CRI 70-90, correlated color temperature (CCT) 2700-6500K	General lighting, residential bulbs
RGB Tri-color	Tunable color output, high CRI (>90), complex driver requirements	Stage lighting, architectural accenting
UV Chip + RGB Phosphor	Enhanced color rendering, reduced blue light hazard	Museum lighting, medical diagnostics
Remote Phosphor	Uniform light distribution, improved thermal management	Commercial downlights, automotive headlamps

3. Structure & Components

Typical white LED construction includes:

Die: Gallium Nitride (GaN) on sapphire substrate emitting blue light (450nm)
Phosphor Layer: Cerium-doped YAG (Y₃Al₅O₁₂) converting blue to yellow wavelengths
Encapsulation: Silicon dioxide lens with secondary optical elements
Thermal Interface: Metal-core PCB (MCPCB) for heat dissipation
Driver Circuit: Constant current source with EMI filtering

4. Key Technical Parameters

Parameter	Typical Range	Importance
Luminous Flux	100-20,000 lm	Determines light output capability
Color Temperature	2700K-6500K	Affects ambiance and visual comfort
Color Rendering Index (CRI)	70-98	Measures color fidelity accuracy
Luminous Efficacy	100-200 lm/W	Energy conversion efficiency metric
Lifespan	25,000-100,000 hrs	Total cost of ownership factor
Forward Voltage	2.8-3.6 V	Driver design specification

5. Application Fields

Residential: Smart bulbs, under-cabinet lighting
Commercial: Retail accent lighting, office panel lights
Industrial: High-bay warehouse fixtures, machine vision systems
Transportation: Automotive headlights, aircraft cabin lighting
Healthcare: Surgical lighting, circadian rhythm regulation

6. Leading Manufacturers & Products

Manufacturer	Key Product Series	Technical Highlights
Signify (Philips)	Luxeon 3535L	180 lm/W efficacy, 90 CRI, automotive grade
OSRAM Opto	Ostar Lighting	Surface-mount package, 2000cd/m luminance
Cree (Wolfspeed)	XHP50.2	High-density emitter, 20A drive current capability
Seoul Semiconductor	WICOP2	Chip-level integration, 0.2W-100W scalability

7. Selection Recommendations

Key considerations:

Optical requirements: Match CRI and CCT to application needs
Thermal management: Select appropriate heatsink and package type
Electrical compatibility: Verify driver specifications and dimming protocols
Form factor: Consider footprint constraints (e.g., 2835, 5630 packages)
Regulatory compliance: Ensure ENERGY STAR, DLC, or UL certification

8. Industry Trends

Emerging developments include:

Micro-LED integration for displays and Li-Fi communication
Quantum dot phosphors expanding color gamut (NTSC >100%)
Smart lighting systems with IoT connectivity (Zigbee, Bluetooth Mesh)
Advanced thermal materials (graphene MCPCBs)
Regulatory shifts toward higher minimum efficacy standards (DOE 2023: 120 lm/W)