WMSIC Electronic Components

Nationstar FOC-357C

ModelFOC-357C
PackageSOP-4-2.54mm
BrandPhotoelectric
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
Photoelectric FOC-357C
Type
Nationstar
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Photoelectric
Electronic Component
FOC-357C
Electronic Component
1
Package
SOP-4-2.54mm
Electronic Component
Transistor Output Optocoupler
Electronic Component
0.217g
Electronic Component
1
Electronic Component
3us
Electronic Component
BM0258756460
Operating Temperature
55℃~+110℃
Load Voltage
80V
Type
DC
Output Current
50mA
Output Type
Photoelectric Transistor
(Pd)
200mW

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

FOC-357C 产品概述

一、产品简介

FOC-357C 是国星光电推出的一款高隔离、单通道光电三极管输出光耦合器,采用 SOP-4-2.54mm 封装,适合在需要电气隔离和信号传输的场合替代直接耦合。器件输入为直流 LED 驱动,输出为光电三极管,具有良好的开关特性和较低的集射极饱和电压,适用于工业控制、通信接口和电源隔离等应用。

二、主要电气参数

  • 输入类型:DC(LED 驱动)
  • 正向压降 Vf:典型 1.2 V
  • 正向电流 If:最高 50 mA(建议按数据手册和热耗限制使用)
  • 输出类型:光电三极管(单通道)
  • 输出电流:最高 50 mA
  • 集射极饱和电压 VCE(sat):约 100 mV(标注条件:如 IF=20 mA, IC=1 mA)
  • 电流传输比 CTR:最小 50%,最大/饱和值可达 600%
  • 最高负载电压:80 V
  • 直流反向耐压 VR(LED):6 V
  • 隔离耐压 Vrms:3.75 kV
  • 上升/下降时间:tr ≈ 4 μs,tf ≈ 3 μs
  • 总功耗 Pd:200 mW
  • 工作温度范围:-55 ℃ ~ +110 ℃

三、主要特点

  • 高电气隔离:3.75 kV RMS 隔离等级,提升系统可靠性与人员安全。
  • 宽 CTR 范围:50% ~ 600%,便于在不同驱动条件下实现多种增益选择。
  • 低饱和压降:VCE(sat) ≈ 100 mV,有利于降低输出饱和损耗、提高传输效率。
  • 较快的响应速度:上升/下降时间在微秒级,适合常见控制信号的隔离传输。
  • 单通道紧凑封装:SOP-4-2.54mm,便于 PCB 密度布置与自动化贴装。
  • 宽温度范围与可靠性设计,适合工业级应用环境。

四、典型应用场景

  • MCU 与高压/噪声电路之间的信号隔离(脉冲、使能、状态反馈等)。
  • 开关电源(SMPS)次级到主控侧的欠压/过压检测与反馈。
  • 工业自动化、PLC、驱动器中的逻辑隔离与接口转换。
  • 电信设备、家电控制板与计量仪表的安全隔离。
  • 低速数字信号或模拟开关场合的隔离传输。

五、设计与使用建议

  • 驱动 LED 时应根据所需 CTR 与输出电流选择合适的 If;尽管 If 可达 50 mA,常用驱动在 1–20 mA 范围以兼顾寿命与热耗。
  • CTR 范围较宽,实际传输比会随 If、温度及器件批次变化,设计降采样电阻或上拉电阻时预留裕量以保证系统稳定。
  • 输出侧负载电压可达 80 V,但输出电流与功耗应满足 Pd=200 mW 的热耗限制,必要时做热仿真或降额使用。
  • 若用于高速信号或脉冲,注意上升/下降时间会受负载电容和上拉电阻影响,应在设计中综合考虑。
  • 封装为 SOP-4,推荐遵循厂家回流焊工艺参数与 ESD 防护要求,避免超温或长时间高温曝露。

六、封装与引脚(常见说明)

封装:SOP-4-2.54mm,单通道设计,适配常见双排贴片焊盘。常见引脚功能划分请以正式数据手册为准(建议在量产前参考国星光电官方文档核对引脚定义与封装尺寸)。

七、可靠性与注意事项

  • 器件适用于宽温度范围(-55 ℃ ~ +110 ℃),但在高温下 CTR 会下降,建议在高温场合做性能验证。
  • 隔离耐压试验应在符合标准的测试条件下进行,实际系统布局(爬电距离、污染等级)也会影响隔离性能。
  • 防静电与正确的储存/回流焊流程能延长器件寿命并保证一致性。

如需电气特性曲线、封装尺寸图和详细引脚定义,请联系国星光电索取 FOC-357C 的完整数据手册,以便在具体电路设计与可靠性验证中获得准确参数与测试条件。

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