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Nationstar FOC-357B
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Photoelectric FOC-357B
- Type
- Nationstar
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Photoelectric
- Electronic Component
- FOC-357B
- Electronic Component
- 1
- Package
- SOP-4-2.54mm
- Electronic Component
- Transistor Output Optocoupler
- Electronic Component
- 1g
- Electronic Component
- 1
- Electronic Component
- 3us
- Electronic Component
- BM0258756461
- 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-357B 产品概述
一、概述
FOC-357B 是国星光电推出的一款光电耦合器件，由红外发光二极管（LED）与光电三极管组成，单通道封装为 SOP-4 (2.54mm)。该器件用于实现不同电路之间的电气隔离与信号传输，常见于开关电源反馈、手机充电器及家用电器电源等场景，兼顾隔离性能与低电压损耗的需求。
二、主要特点
- 隔离电压：可承受 3.75 kVrms，满足常见电源隔离要求。
- 宽范围电流传输比（CTR）：最小 50%，最大可达 600%，适配多种驱动条件。
- 低饱和电压：VCE(sat) ≤ 100 mV（典型测试条件 IF=20 mA, IC=1 mA），导通损耗小。
- 传输速率适中：上升时间 tr≈4 μs，下降时间 tf≈3 μs，适用于低至中速数字信号。
- 工作温度：-55℃ ~ +110℃，适应工业级温度范围。
三、电气参数（要点）
- LED 正向压降 Vf：≈1.2 V（典型）
- 最大正向电流 If：50 mA（绝对最大）
- 输出集电极电流：最大 50 mA
- 输出端耐压（Load voltage）：80 V（最大集电极-发射极电压）
- 直流反向耐压 Vr（LED）：6 V
- 总功耗 Pd：200 mW
四、典型应用
- 开关电源（SMPS）一次/二次侧反馈隔离
- 手机充电器与适配器的隔离信号传输
- 家电控制电源、继电器驱动信号隔离
- MCU 与高压电路间的电平移位与防地环路干扰
五、使用建议
- LED 驱动电阻计算：R = (Vin - Vf) / If。示例：5 V 驱动且取 If=1 mA 时，R ≈ (5 - 1.2) / 1 mA ≈ 3.8 kΩ。
- 输出侧宜采用开集电极结构并配置上拉电阻，上拉阻值应保证 IC ≤ 50 mA 且满足响应速度需求（例如 4.7 kΩ~47 kΩ 视速率与电源而定）。
- 注意 CTR 的较大范围，设计时应考虑最坏情况下的 CTR 下限以保证可靠触发，必要时在输出侧增加限流或负反馈电路以稳定工作点。
- 不可反向给 LED 施加超过 Vr（6 V），避免损坏；器件总功耗请在高温下按规范降额使用。
六、可靠性与封装
- 封装：SOP-4，2.54 mm 引脚间距，便于通用 PCB 布局与波峰/回流焊接工艺。
- 环境与寿命：适合工业级环境，建议按国标和客户设计规范考虑爬电距离与绝缘老化因素，进行必要的电气强度与寿命试验验证。
FOC-357B 在隔离性能、低饱和压降与适中速度之间取得平衡，是电源反馈与通用隔离信号传输的可靠选择。若需原理图示例、封装引脚图或详细规格曲线，可提供进一步技术资料。
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