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  • ESD 二极管电流规格

    • ZHCAAP8B December   2015  – August 2021 CC430F6125 , CC430F6126 , CC430F6127 , CC430F6135 , CC430F6137 , CC430F6147 , MSP430AFE221 , MSP430AFE222 , MSP430AFE223 , MSP430AFE231 , MSP430AFE232 , MSP430AFE233 , MSP430AFE251 , MSP430AFE252 , MSP430AFE253 , MSP430BT5190 , MSP430F1101 , MSP430F1101A , MSP430F1111A , MSP430F112 , MSP430F1121 , MSP430F1121A , MSP430F1122 , MSP430F1132 , MSP430F122 , MSP430F1222 , MSP430F123 , MSP430F1232 , MSP430F133 , MSP430F135 , MSP430F147 , MSP430F1471 , MSP430F148 , MSP430F1481 , MSP430F149 , MSP430F1491 , MSP430F155 , MSP430F156 , MSP430F157 , MSP430F1610 , MSP430F1611 , MSP430F1612 , MSP430F167 , MSP430F168 , MSP430F169 , MSP430F2001 , MSP430F2002 , MSP430F2003 , MSP430F2011 , MSP430F2012 , MSP430F2013 , MSP430F2013-EP , MSP430F2101 , MSP430F2111 , MSP430F2112 , MSP430F2121 , MSP430F2122 , MSP430F2131 , MSP430F2132 , MSP430F2232 , MSP430F2234 , MSP430F2252 , MSP430F2254 , MSP430F2272 , MSP430F2274 , MSP430F233 , MSP430F2330 , MSP430F235 , 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MSP430FR5967 , MSP430FR5968 , MSP430FR5969 , MSP430FR5969-SP , MSP430FR59691 , MSP430FR5970 , MSP430FR5972 , MSP430FR59721 , MSP430FR5986 , MSP430FR5987 , MSP430FR5988 , MSP430FR5989 , MSP430FR5989-EP , MSP430FR59891 , MSP430FR5994 , MSP430FR6820 , MSP430FR6822 , MSP430FR68221 , MSP430FR6870 , MSP430FR6872 , MSP430FR68721 , MSP430FR6877 , MSP430FR6879 , MSP430FR68791 , MSP430FR6887 , MSP430FR6888 , MSP430FR6889 , MSP430FR68891 , MSP430FR6920 , MSP430FR6922 , MSP430FR69221 , MSP430FR6927 , MSP430FR69271 , MSP430FR6928 , MSP430FR6970 , MSP430FR6972 , MSP430FR69721 , MSP430FR6977 , MSP430FR6979 , MSP430FR69791 , MSP430FR6987 , MSP430FR6988 , MSP430FR6989 , MSP430FR69891 , MSP430FW423 , MSP430FW425 , MSP430FW427 , MSP430FW428 , MSP430FW429 , MSP430G2001 , MSP430G2101 , MSP430G2102 , MSP430G2111 , MSP430G2112 , MSP430G2121 , MSP430G2131 , MSP430G2132 , MSP430G2152 , MSP430G2153 , MSP430G2201 , MSP430G2202 , MSP430G2203 , MSP430G2210 , MSP430G2211 , MSP430G2212 , MSP430G2213 , MSP430G2221 , MSP430G2230 , MSP430G2231 , MSP430G2232 , MSP430G2233 , MSP430G2252 , MSP430G2253 , MSP430G2302 , MSP430G2303 , MSP430G2312 , MSP430G2313 , MSP430G2332 , MSP430G2333 , MSP430G2352 , MSP430G2353 , MSP430G2402 , MSP430G2403 , MSP430G2412 , MSP430G2413 , MSP430G2432 , MSP430G2433 , MSP430G2444 , MSP430G2452 , MSP430G2453 , MSP430G2513 , MSP430G2533 , MSP430G2544 , MSP430G2553 , MSP430G2744 , MSP430G2755 , MSP430G2855 , MSP430G2955 , MSP430L092 , MSP430TCH5E

       

  • CONTENTS
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  • ESD 二极管电流规格
  1.   商标
  2. 1ESD 二极管在下电上电期间的重要副作用
  3. 2规格简介和说明
  4. 3应用设计注意事项
    1. 3.1 正确电源电路的注意事项
      1. 3.1.1 具有良好灌电流能力的电源
      2. 3.1.2 具有受限灌电流能力的电源
      3. 3.1.3 双向电源
    2. 3.2 替代解决方案
      1. 3.2.1 齐纳二极管
      2. 3.2.2 并联稳压器
  5. 4ESD 二极管电流和 I/O 输出驱动能力的相关阐释
  6. 5结论
  7. 6参考文献
  8.   修订历史记录
  9. 重要声明
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APPLICATION NOTE

ESD 二极管电流规格

本资源的原文使用英文撰写。 为方便起见,TI 提供了译文;由于翻译过程中可能使用了自动化工具,TI 不保证译文的准确性。 为确认准确性,请务必访问 ti.com 参考最新的英文版本(控制文档)。

商标

MSP430is a TM ofTI corporate name.

Other TMs

1 ESD 二极管在下电上电期间的重要副作用

当主电源(通常为 DVCC)未上电且在 GPIO 引脚上施加电压时,本应用报告中描述的方法不适用。这种状况可能会导致通过 GPIO 上的 ESD 结构意外地为 MCU 供电。在上电和断电情况下都需要将其纳入考量。如果主电源和 GPIO 同时供电,请确保考虑到主电源中的延迟(例如,内联电容造成的延迟或 LDO 延迟),并确保 GPIO 未在主电源之前供电。

鉴于 ESD 二极管的物理架构(将在以下几节中说明),如果 MSP 微控制器未正确供电,则会出现其他次要副作用。不正确的供电场景包括:通过另一个电源供电的传感器,或由应用中其他 IC 驱动的通信线路。在 MCU 主电源关闭的情况下,这些信号连接到 MCU,则视为不正确供电的情况。在断电场景中,副作用是器件会通过 ESD 二极管反向供电。但这并非 MSP 微控制器预期的供电方案,并会因 ESD 二极管的电流限制和预期电源路径的旁路而出现错误和不可预测的行为。在非常糟糕的情况下,这会导致器件物理损坏、意外执行或存储器损坏,从而使应用出现故障。

 

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