Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
worldsemi WS2818B
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- worldsemi WS2818B
- Type
- WORLDSEMI
- Minimum package
- 4000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- WORLDSEMI
- Electronic Component
- WS2818B
- Electronic Component
- 1
- Package
- SOP-8
- Electronic Component
- LEDDriver
- Electronic Component
- PWM
- Electronic Component
- 0.194g
- Electronic Component
- 1
- Channel Count
- 3
- Electronic Component
- BM0264678323
- Operating Temperature
- 25℃~+85℃
- Output Voltage
- 12V
- Output Current
- 16.5mA
- Operating Voltage(DC)
- 3.5V~5.5V
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
WS2818B LED驱动控制器产品概述
一、产品定位与核心特性
WS2818B是Worldsemi推出的3通道内置开关管LED驱动控制器，专为小功率LED照明、显示及指示场景设计，核心聚焦“简化电路+精准调光+宽适配”三大方向：
- 内置高压开关管，无需额外外接功率器件，直接驱动LED灯珠；
- 支持PWM数字调光，调光精度高且无频闪，适配不同亮度需求；
- 宽电压/宽温范围，适配多类电源与复杂环境。
二、基础电气参数详解
该芯片参数明确，覆盖性能边界与应用场景：
参数项 规格值 说明 输入电压（DC） 3.5V~5.5V 适配3.7V锂电池、5V USB等常见电源 输出通道数 3通道独立驱动 每通道可单独控制，支持RGB等多色应用 单通道输出电流 16.5mA 总电流≤50mA，低功耗设计适合电池供电 输出电压兼容性 支持12V LED正向电压 适配常规小功率LED灯珠（如0.5W以下） 调光方式 PWM数字调光 兼容3.3V/5V逻辑电平，调光范围0~100% 工作温度范围 -25℃~+85℃ 满足户外低温、室内高温环境 开关管配置 内置N沟道MOS管 无需外置功率管，简化BOM与PCB设计三、封装与引脚功能
WS2818B采用SOP8小封装，体积紧凑（5.2×6.0mm），适合小型PCB布局，典型引脚功能如下（参考行业常规配置）：
- VCC：电源输入（3.5~5.5V）；
- GND：接地端；
- PWM：PWM调光信号输入（建议频率100Hz~1kHz，避免频闪）；
- CH1：通道1 LED输出端；
- CH2：通道2 LED输出端；
- CH3：通道3 LED输出端；
- EN：使能端（高电平有效，可选；低电平关闭输出）；
- NC：空脚（无功能，焊接时无需处理）。
四、典型应用场景
因体积小、多通道、易驱动，WS2818B广泛用于：
- 小型LED显示：3色（RGB）小尺寸显示屏（如电子时钟、设备状态屏）；
- LED装饰照明：3通道RGB小灯串、桌面氛围灯、车载装饰灯；
- 家电/设备指示：多通道LED指示灯（如空调、洗衣机的工作状态显示）；
- 小型背光：3分区LED背光（如小型数码产品、仪器仪表背光）。
五、产品优势与可靠性
- 成本与体积优势：内置开关管减少外置器件，SOP8封装缩小PCB面积，适合批量小型化产品；
- 调光稳定性：PWM调光无模拟调光的颜色偏移问题，线性度好，无频闪；
- 宽适配性：输入电压覆盖锂电池与USB电源，宽温工作适应不同环境；
- 可靠性设计：内置过流保护（每通道电流限制）、过温保护，延长LED与芯片寿命；
- 环保合规：符合RoHS 2.0标准，无铅封装，满足绿色制造要求。
六、实用注意事项
- 输入电压需严格控制在3.5~5.5V，避免过压损坏；
- PWM调光频率建议≥100Hz，防止人眼感知频闪；
- LED输出需串联限流电阻（公式：R=(V_LED正向电压)/16.5mA），确保电流稳定；
- 焊接时需做静电防护（如戴防静电手环），避免ESD损坏芯片。
WS2818B以“高集成度+低成本+易应用”为核心，是小功率多通道LED驱动场景的优选方案，适合消费电子、家电、照明等领域的批量应用。
Request for quote
Send RFQ
Use the form for single models, category sourcing, and multi-line BOM requirements.
Product sourcing intelligence
Model, package, availability, and BOM fit reviewed before quotation.
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
BOM matching & alternatives
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Sourcing availability signal
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
Buyer sourcing scenarios
Examples of how common component sourcing requests are organized.
Typical RFQ scenarios based on the WMSIC form fields, catalog data, manual review steps, and shipment preparation workflow.
The buyer shares the full part number, package requirement, quantity, destination, and available product photos so the quotation can record the exact version under review.
A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.
The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.
Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.
Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.
When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.
Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.
The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.
Related products
Packaged components ready for RFQ.
