WS2811
Manufacturer
Model
WS2811
Category
The Worldsemi WS2811 is a cost-effective LED driver with wide input voltage range (5-24V), 800kHz PWM control, and 3 channels delivering 16.5mA each. Designed for linear lighting applications, it supports industrial and commercial use cases requiring precise current regulation and compact PCB integration. Thermal management requires careful layout to handle power dissipation, and it is optimized for high-volume production with RoHS compliance.
Reference Pricing
Reference Stock
Specifications
| Drive Current | 16.0 mA |
| Drive Voltage | 3.5~5.7 V |
| Efficiency | Unknown |
| Interface Type | Serial |
| Lifetime | Unknown |
| Operating Frequency | 800 kHz |
| Operating Temperature Range | -40~+85 ℃ |
| Package Type | SOP-8 |
| Power Supply Voltage | 3.5~5.7 V |
| Thermal Performance | Unknown |
Function And Role
Core Function
LED driver for controlling and powering LED strips, displays, and lighting systems
Key Characteristics
- 20V output voltage
- 800kHz PWM switching frequency
- 3 independent channels
- 16.5mA output current per channel
- 5-24V input voltage range
- SOP-8 surface-mount package
Application Domains
Basic Scenarios
- LED strip lighting systems
- Discrete LED display arrays
- General purpose linear lighting
Extended Scenarios
- Smart home lighting automation
- Industrial machine vision lighting
- Automotive interior lighting
- Agricultural grow lighting
Precautions
| Soldering | Use 0.5mm pitch soldering iron with 60-80℃ temperature |
| Current Limit | Max 16.5mA per channel to prevent LED damage |
| Voltage Limit | Input must maintain 5-24V, output must not exceed 20V |
| Thermal Management | Operating temperature -25°C to +85°C; thermal pad required for power >1W |
| Storage | Store in dry environment below 85% RH, avoid extreme temperature fluctuations |
| Risk Warnings |
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Alternative Model Params
- Output voltage tolerance (±10%)
- Switching frequency range (750-850kHz)
- Current regulation accuracy (±5%)
- Input voltage range (4.5-28V)
- Number of channels (2-4)
- PWM dimming resolution (8-10 bits)
Design Recommendations
| Layout | Place decoupling capacitors (100nF) close to VCC pins |
| Thermal | Use 10x10mm copper pad for thermal relief |
| Compatibility | Ensure compatible with 5V logic systems via level shifting |
| Testing | Verify output stability under 10% ripple voltage |
Market Positioning
| Strengths |
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| Weaknesses |
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