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ETA ETA3421BS2F
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ETA ETA3421BS2F
- Type
- ETA
- Minimum package
- 3000 卷
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ETA
- Electronic Component
- ETA3421BS2F
- Electronic Component
- 1
- Package
- SOT-23-5
- Type
- DC-DC
- Electronic Component
- LEDDriver
- Electronic Component
- PWM
- Electronic Component
- 0.057g
- Electronic Component
- 1
- Features
- Built-in; LED; (OVP); (OTP); (SCP)
- Electronic Component
- BM0264677471
- Operating Temperature
- 40℃~+85℃
- Switching Frequency
- 1.5MHz
- Electronic Component
- Electronic Component
- Output Current
- 1A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
ETA3421BS2F 产品概述
ETA3421BS2F 是钰泰（ETA）推出的一款高效 DC-DC 降压恒流 LED 驱动器，采用 SOT-23-5 小封装，适合体积受限的便携和照明应用。器件工作电压范围为 3V 至 5.5V，内置开关管和多种保护功能，可稳定提供高达 1A 的恒流输出，专为对效率、尺寸和可靠性有较高要求的中小功率 LED 驱动设计。
一、主要规格
- 类型：DC-DC 降压恒流 LED 驱动器
- 输入电压（DC）：3.0V ~ 5.5V
- 输出电流：最高 1A
- 反馈电压（FB）：0.1V（低压差反馈以提高效率）
- 开关频率：固定 1.5MHz
- 封装：SOT-23-5
- 工作温度：-40℃ ~ +85℃
二、功能与保护
- PWM 调光：通过 EN 引脚实现 20kHz 至 100kHz 的真 PWM 调光，支持数字编程亮度控制。
- 内置软启动：上电或使能时限制启动涌流，降低输入冲击。
- LED 开路保护：检测并响应开路状态，提升系统可靠性。
- 过压保护（OVP）、过温保护（OTP）、短路保护（SCP）：多重保护机制保障器件与外设安全。
三、设计优势与性能亮点
- 高开关频率（1.5MHz）允许采用更小的电感值和低直流电阻（DCR）电感器，从而减小电感体积并提升效率。
- 高频率与低反馈电压（0.1V）共同实现较高转换效率，适合对功耗敏感的移动或手持设备。
- 外围陶瓷输入/输出电容可选用小容量器件，整体 BOM 和板面积可优化。
- 内置开关管简化外部布局，减少器件数量与装配复杂度。
四、典型应用场景
- 单节锂电（或 USB 5V）供电的便携式手电筒与线性照明
- 小型车载或摩托车照明模块
- 指示灯与背光驱动
- 需要 PWM 调光控制的消费电子照明子系统
五、布局与选型建议
- 采用低 DCR、适合高频的功率电感以兼顾效率与温升；考虑电感饱和电流高于最大输出电流。
- 输入与输出旁路陶瓷电容尽量靠近芯片电源与开关节点布局，以抑制环路噪声并稳定控制环。
- 留意器件热管理，SOT-23-5 封装在高载流下需合理规划铜箔散热与走线宽度。
- 在有抗干扰要求的系统中，可在输入侧加小电感或滤波网络以抑制开关噪声。
总结：ETA3421BS2F 在小封装中集成高频降压恒流、PWM 调光与多重保护，是便携式与空间受限照明应用的优选方案，兼顾效率、尺寸与系统可靠性。
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