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GR ULN2803
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- GR ULN2803
- Type
- GR
- Minimum package
- 2000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- GR
- Electronic Component
- ULN2803
- Electronic Component
- 1
- Package
- SOP-18-300mil
- Electronic Component
- Darlington Transistor Array
- Electronic Component
- 0.58g
- Electronic Component
- 1
- Channel Count
- Electronic Component
- Electronic Component
- BM0264555453
- Operating Temperature
- 40℃~+85℃
- Current(Ir)
- 50uA
- (Vf)
- 1.7V
- Current(on)
- 0.7mA
- Electronic Component
- Electronic Component
- Electronic Component
- 2000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
GR（国睿）ULN2803 — 八路达林顿晶体管阵列产品概述
一、产品简介
GR（国睿）ULN2803 是一款集成八路达林顿晶体管阵列的驱动器，封装为 SOP-18-300mil。每通道可承受最高集-射极击穿电压 Vceo = 50V，集电极电流 Ic = 500mA，适用于驱动继电器、步进电机线圈、小功率电磁阀、LED 阵列等中低功率感性或阻性负载。器件工作温度范围为 -40℃ 至 +85℃，支持宽范围逻辑输入（最大输入电压 VI = 30V）。
二、主要特点
- 八路独立达林顿输出，节省 PCB 空间与系统成本。
- 高耐压：Vceo = 50V，可直接驱动较高电压的负载。
- 单通道最大集电极电流 500mA（峰值短时驱动需注意散热）。
- 低输入驱动电流：输入电流(on) ≈ 0.7mA，便于与 MCU/逻辑电平直接驱动。
- 输出正向压降（Vf）约 1.7V，开关闭态功耗可控。
- 低反向泄漏电流 Ir ≈ 50μA，有利于保持断态输出的稳定性。
- 内置或易于接入吸收二极管，用于感性负载电流回收（请根据具体封装引脚资料确认 COM 引脚连接）。
三、典型应用场景
- 微控制器驱动继电器与电磁阀（工业/家电控制）。
- 驱动步进电机驱动器的线圈或电磁执行器。
- LED 大电流阵列或显示背光驱动（注意 Vf 与功耗）。
- 工业接口或缓冲器，用于信号电平转换与放大。
四、使用注意事项与设计建议
- 散热管理：单通道 500mA 时输出功耗为 I × Vce(sat)，Vf≈1.7V 下每通道损耗显著，多通道同时工作需注意封装功耗与 PCB 散热，必要时增加铜箔或散热片并限制连续电流。
- 感性负载保护：对线圈类负载，建议将器件的 COM 引脚连接到电源正极，利用内置钳位二极管回收反向电流，若无内置二极管需外接吸收器件。
- 并联驱动：若需超过单通道电流，可考虑使用多通道并联，但需加入小阻值平衡电阻以避免电流不均衡。
- 输入接口：器件输入电流低（≈0.7mA），大多数 MCU GPIO 可直接驱动；若输入电压接近最大 VI=30V，应确认逻辑侧限流或保护。
五、封装与引脚提示
SOP-18-300mil 封装，18 引脚（8 路输入 + 8 路输出 + COM + GND）。布板时注意引脚间距与散热铜箔面积，GND 引脚应可靠接地以保证热流散发与电气性能。
六、结论
GR（国睿）ULN2803 是一款可靠、易用的八路达林顿驱动阵列，适合中低功率的继电器、马达线圈和 LED 驱动等场合。设计时应重视散热与感性负载保护，合理利用器件的高耐压与低输入电流特性，以实现稳定长寿命的驱动方案。若需替代或匹配规格，请参考 Vceo、Ic、输入电流与封装尺寸的严格对照。
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