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worldsemi WS2811F
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- worldsemi WS2811F
- Type
- WORLDSEMI
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- WORLDSEMI
- Electronic Component
- WS2811F
- Electronic Component
- 1
- Package
- FSOP-8
- Electronic Component
- LEDDriver
- Electronic Component
- PWM
- Electronic Component
- 0.058g
- Electronic Component
- 1
- Channel Count
- 3
- Features
- (OVP)
- Electronic Component
- BM0225277447
- Operating Temperature
- 40℃~+85℃
- Switching Frequency
- 800kHz
- Output Voltage
- 20V
- Output Current
- 16.5mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
WS2811F 产品概述
一、主要特性
WS2811F 是一款三通道恒流 LED 驱动器，适用于 RGB 或多颜色点光源控制。器件具备过压保护（OVP），工作温度范围宽（-40℃ 到 +85℃），工作电压（直流）范围为 3.5V ~ 5.7V，三通道输出电流为 16.5mA（每通道典型值），调光方式为 PWM，开关频率 800kHz，器件输出电压能力可达 20V。品牌为 Worldsemi，封装形式为 FSOP-8，集成度高，便于在紧凑光源系统中使用。
二、电气规格要点
- 供电范围：DC 3.5V ~ 5.7V，兼顾 5V 系统可靠工作；需注意稳压与纹波抑制以保证恒流精度。
- 输出电流：16.5mA/通道（典型），适合直接驱动常见高亮度 LED 单颗或小串联组合。
- 调光方式：PWM 调光，可实现高精度亮度控制及颜色混合，PWM 频率由内部开关频率及外部驱动逻辑决定。
- 开关频率：800kHz，开关速度快，有利于减少闪烁及提高响应速度，但对布局与 EMI 管理提出更高要求。
- 保护功能：集成过压保护（OVP），提高系统在异常工况下的可靠性。
- 输出电压能力：20V（器件可承受或驱动的输出端电压等级），支持多颗 LED 串联或高压应用。
三、典型应用场景
- RGB 点阵、像素灯条和可编程点光源，适合舞台照明、装饰照明和城市亮化。
- 背光模块与指示灯阵列，需要单通道恒流和 PWM 调光的场景。
- 紧凑型智能灯具、可穿戴光源及嵌入式显示单元，FSOP-8 有利于 SMT 工艺与体积控制。
四、封装与热可靠性
WS2811F 采用 FSOP-8 小型封装，有利于高密度贴装。但在高电流或高环境温度下需关注散热管理：合理的铜箔面积、热 vias 与接地回流路径可降低结温；在设计中预留足够的 PCB 散热面积以保证长期稳定性。
五、设计与使用建议
- 电源部分建议使用低 ESR 的旁路电容（靠近器件 VCC 与 GND 引脚）以抑制开关噪声和纹波。
- PWM 控制信号需具备良好电平兼容性与上升/下降时间控制，避免由于慢边沿引起功耗上升或误触发。
- 布局上将高频开关节点与敏感模拟/逻辑信号分离，减少 EMI 干扰。必要时可加小电感或 RC 滤波网络。
- 若驱动多颗 LED 串联，注意总串联电压不超过器件输出电压能力并考虑热耗散。
- 系统级应配合过流、过温保护与适当的软启动策略，提升整机可靠性。
六、常见注意事项
- 在高温或长时间满载条件下验证器件热稳定性并做好热设计。
- 使用前参考厂商完整数据手册与典型应用电路，按推荐的数据和 PCB 原则设计。
- 封装焊接工艺需符合 FSOP-8 的回流曲线，避免焊接应力和热损伤。
总结：WS2811F 以其三通道恒流输出、PWM 调光与宽工作电压特性，适合中小功率可编程 RGB 灯具与像素化照明应用。合理的电源、布局与热管理是保证其稳定输出与长寿命的关键。
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