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YONGYUTAI ZMM20V
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- YONGYUTAI ZMM20V
- Type
- YONGYUTAI
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- YONGYUTAI
- Electronic Component
- ZMM20V
- Electronic Component
- 1
- Package
- LL-34
- Electronic Component
- Zener Diode
- Electronic Component
- 0.046g
- Electronic Component
- 1
- (Zzk)
- 220Ω
- (Zzt)
- 55Ω
- Electronic Component
- BM0226337804
- Diode
- 1
- Current(Ir)
- 100nA
- Power Dissipation(Pd)
- 500mW
- Electronic Component
- 18.8V~21.2V
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
ZMM20V 产品概述
一、产品简介
ZMM20V 是永裕泰（YONGYUTAI）出品的一款独立式稳压二极管，标称稳压值为20V，公差范围为18.8V ~ 21.2V（相当于约±6%）。器件为小型LL‑34轴向封装，额定耗散功率为500mW，适合低功耗电压基准、保护与基准偏置场合。
二、主要参数一览
- 稳压值（标称）：20V
- 稳压值范围：18.8V ~ 21.2V
- 最大耗散功率 Pd：500mW
- 动态阻抗（低电流区）Zzk：220Ω
- 动态阻抗（工作区）Zzt：55Ω
- 反向泄漏电流 Ir：100nA（规格保证）
- 资料典型值：在15V时测得反向电流约2µA（典型条件下，具体以完整数据表为准）
- 封装：LL‑34（轴向玻璃/环氧封装）
三、电气特性解读
Zzk（220Ω）代表低电流区的“膝态”阻抗，表明在非常小的偏流下电压随电流变化较大；Zzt（55Ω）则为工作区动态阻抗，表示在合适稳压电流下有较好的稳压能力。Pd=500mW 限制了最大稳压电流 Iz_max≈Pd/Vz≈0.5/20=25mA，实际设计时应留有余量并考虑环境温度的降额。
示例：若电路中电流波动 1mA，按 Zzt 计算电压波动约 55mV，按 Zzk 计算则为 220mV，因此使用时应保证处于工作区以获得较佳稳定性。
四、典型应用场景
- 小功率基准电压源与偏置电路
- 过压/钳位保护（信号线、模拟输入）
- 仪表放大器参考／精密电路的二次稳压（配合高精度运放）
- 便携设备、消费电子低功耗稳压
五、选用与电路设计建议
- 由于 Pd 仅 500mW，本器件适合作低功率稳压或参考。若需从高电压降至20V，应使用限流电阻或配合串联晶体管以分担功耗。
- 计算限流电阻示例：若电源 30V，Vz≈20V，假设Iz工作电流为5mA，则R=(30-20)/5mA=2kΩ；最坏情况 Iz_max 不超过 25mA，须保证 R 能限制电流不超 Pd。
- 为降低噪声并改善瞬态响应，可在稳压二极管并联 0.01µF~1µF 的陶瓷电容。
- 对于精密参考，应选择稳定的偏流点并考虑温度系数与长期漂移。
六、封装与可靠性
LL‑34 小型轴向封装利于手工焊接与自动贴装，但散热能力有限。长期可靠性受焊接温度、环境温度影响较大，推荐在装配过程中采用短时间、低温焊接并避免对封装过度机械应力。
七、使用与维护注意事项
- 焊接时管脚加热不宜过久，避免高温损伤封装和内部接合；
- 使用时留足散热余量并在高温环境下降额运行；
- 测试与量产时参考完整数据表的测量条件（温度、测流点）以获得一致性数据。
总结：ZMM20V 以其20V 标称电压、500mW 的功耗等级和小型 LL‑34 封装，适合低功率稳压、基准和钳位应用。设计时应注意稳压电流选择、功耗分配和热管理，以发挥其稳定性与可靠性。若需更详细的曲线与测试条件，请参阅厂方完整数据手册。
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