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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.
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选择正确的ESD保护二极管,请注意第3节介绍的主要电气特性。
1.保持被保护信号的质量
a)信号线电压
根据被保护信号线的最大电压,选择具有相应反向击穿电压(VBR)或反向工作峰值电压(VRWM)的ESD保护二极管。
b)信号极性
跨GND电平信号(如模拟信号),使用双向ESD保护二极管。
c)信号速度
根据被保护信号线的最大频率,选择总电容(CT)合适的的ESD保护二极管。
2.增强ESD保护性能
d)动态电阻
选择动态电阻(RDYN)尽可能低的ESD保护二极管。
e)钳位电压
根据所需VRWM选择最小钳位电压(VC)的ESD保护二极管。
务必选择VC低于受保护器件耐受电压的二极管。
3.ESD保护二极管ESD耐受性
f)IEC 61000-4-2
选择保证ESD性能高于系统ESD抗扰度要求的ESD保护二极管。
但请注意,ESD保护二极管的ESD性能通常与其总电容成正比。
g)IEC 61000-4-5
选择电气额定值高于峰值脉冲功率和峰值脉冲电流要求的ESD保护二极管。