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CJ CJQ4459A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ CJQ4459A
- Type
- CJ
- Minimum package
- 4000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- CJQ4459A
- Electronic Component
- 1
- Package
- SOP-8
- Electronic Component
- 1 P
- Type
- P
- Electronic Component
- MOSFET
- Electronic Component
- 0.191g
- Electronic Component
- 1
- Electronic Component
- BM0230031795
- Operating Temperature
- 55℃~+150℃
- Power Dissipation(Pd)
- 2.3W
- Electronic Component
- Electronic Component
- Electronic Component
- 4000
- Voltage(Vdss)
- 30V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
CJQ4459A 产品概述
一、基本特性
CJQ4459A 是一款 P 沟道场效应晶体管（P-MOSFET），主要电气参数如下：
- 漏源耐压 Vdss：30V
- 连续漏极电流 Id：6A
- 导通电阻 RDS(on)：40mΩ（在 VGS=4.5V、测试电流 5A 条件下）
- 最大耗散功率 Pd：2.3W
- 阈值电压 VGS(th)：1.6V
- 总栅极电荷 Qg：13.4nC（@10V）
- 输入电容 Ciss：760pF（@15V）
- 反向传输电容 Crss：66pF（@15V）
- 输出电容 Coss：107pF
- 工作温度范围：-55℃ ～ +150℃
- 封装：SOP-8
- 品牌：CJ（江苏长电/长晶）
二、性能要点与使用建议
- 低导通电阻（40mΩ）在中低压应用中可降低导通损耗，适合要求较高效率的开关场合。
- 较大的总栅极电荷（13.4nC @10V）与较高的 Ciss 表明在高频快速开关时需要较强的驱动能力，建议搭配能提供足够电流的栅极驱动或在栅极上加串联电阻以控制 dv/dt。
- 额定耗散功率 2.3W 和 SOP-8 封装对散热有限制，实际使用时应关注 PCB 热设计（大面积铜箔、过孔散热通道），避免长期在 Pd 较高的条件下工作。
- 阈值电压 1.6V 表明在接近逻辑电平时能开始导通，但完全导通仍需较高 VGS；注意 P 沟型栅源电压的极性和驱动范围。
三、典型应用场景
- 电源管理中的高边开关与负载断电（P 沟道便于高侧控制）
- 电池保护与反向电流隔离
- 便携式设备的电源切换与电源路径控制
- 中低功率 DC-DC 转换器中的同步或侧边开关（需评估开关损耗与驱动）
四、封装与热管理要点
SOP-8 可实现小体积安装，但热阻相对较大：
- 通过在 PCB 上扩展散热铜箔、使用多孔热通道和增加接地/电源铜层以降低结-环境热阻。
- 在长时间或高占空比工作下，核算结温上升，确保不超过 150℃ 的最高工作温度限制。
五、选型与注意事项
- 若应用要求更低的导通损耗或更高的频率，需比较 RDS(on)、Qg 与 Ciss 等参数，或考虑更大封装的 MOSFET。
- 确认驱动电压范围与电路中实际 VGS（含极性）是否匹配，避免栅极过压或未完全导通。
- 上板调试时建议使用限流电源并监测封装温度，验证实际损耗与热设计。
总体而言，CJQ4459A 适合 30V 以内、6A 级别的高侧开关与电源管理场合，需在栅极驱动与散热设计上给予足够重视以发挥其低 RDS(on) 的优势。
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