LED Lighting

LED Lighting - White

Part Number	Description / PDF	Quantity
SPMWH1228FD5WAPMS3 Samsung Semiconductor	LED 6500K 80CRI SMD	0
SPMWHT541MD5WAQMSD Samsung Semiconductor	LED COOL WHITE 5700K 80CRI 4SMD	0
SPMWHT327FD5GBV0S3 Samsung Semiconductor	LED WHITE 3000K 80CRI SMD	0
SPMWH1228FD7WATKSA Samsung Semiconductor	LED LM281B+ NEUT WHT 4000K SMD	0
SPMWH1228FD7WAP0SC Samsung Semiconductor	LED LM281B+ COOL WHT 6500K SMD	0
SPMWH1228FD5WAW0SC Samsung Semiconductor	LED LM281B+ WARM WHT 2700K SMD	0
SPMWH1228FD7WAWKSC Samsung Semiconductor	LED LM281B+ WARM WHT 2700K SMD	0
SPMWH1221FD7GBU0SA Samsung Semiconductor	LED 3500K 90CRI SMD	11999
SPMWHT327FD3GBTMS3 Samsung Semiconductor	LED WHITE 4000K 70CRI SMD	0
SPMWH1228FD5WAW0SG Samsung Semiconductor	LED LM281B+	0
SPMWH1228FD7WAVMS4 Samsung Semiconductor	LED LM281B WARM WHT 3000K 2SMD	39162
SPMWH1228FD5WARMS4 Samsung Semiconductor	LED 5000K 80CRI SMD	35638
SCP8TT78HEL1TLS06E Samsung Semiconductor	LED LM101B CHIP SCALE	33205
SPMWHD32AMD5XAW0S0 Samsung Semiconductor	LED	35866
SPMWHT541ML5XATMS5 Samsung Semiconductor	LED 4000K 80CRI SMD	17198
SPMWH1228FD5WAP0SG Samsung Semiconductor	LED LM281B+	0
SPMWHT541MD5WAWMS1 Samsung Semiconductor	LED WARM WHITE 2700K 4SMD	0
SPMWHD32AMD7XAT0S0 Samsung Semiconductor	LED MID PWR LM301B 3MMX3MM	0
SPMWHT541ML5XAU0S5 Samsung Semiconductor	LED LM561C WARM WHT 3500K 4SMD	23405
SPMWH1228FD7WAQ0SG Samsung Semiconductor	LED LM281B+	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)