TVS 保护管layout技巧

PCB Design Guidelines for ESD SuppressionSurging Ideas TVS Diode Application Note
PROTECTION PRODUCTS
PCB Design Guidelines for ESD Suppression Printed circuit board (PCB) layout is a critical component for ESD immunity. Initial effort invested in a sound PCB layout will save costly debugging and rework. While TVS diodes are required to suppress the effects of direct charge injection that results from the ESD discharge, PCB design mainly impacts the effects due to the EM fields that are generated by the discharge current. This application note will provide PCB design guidelines for optimum ESD immunity. Circuit Loops Current is induced into any loop that encloses a changing magnetic flux. The magnitude of the current will be proportional to the size of the loop. Larger loops enclose more flux and thus higher currents are induced