Reverse Engineering PCB Rules For TVS Diode Performance
Reverse Engineering PCB Rules For TVS Diode Performance
Transient Voltage Suppressors (TVS) avalanche diodes and diode arrays can be used to protect sensitive electronic components from the surge pulses that arise from ESD and EMI. The small size, fast response time, low clamping voltage and low cost of TVS diodes provides for an effective solution to prevent surge problems. Avalanche TVS diodes and diode arrays are relatively simple devices to use to suppress surge voltages. Only a few Reverse Engineering PCB rules must be followed to optimize the ESD and EMI immunity level of the protection circuits.
Reverse Engineering PCB layout is an important factor in creating an effective surge suppression circuit. The following PCB guidelines are recommended to enhance the performance of a TVS device:
• Locate the TVS Devices Close to the I/O Connector
• Connect the Surge Protection Circuits to Chassis or Power Ground
• Minimize the PCB’s Parasitic Inductances
• Reduce the Loop Area Formed by the PCB Traces
• Select Surface Mount TVS Devices
Designing in EMI and ESD protection at the beginning of the project saves time and money, as shown in Below Figure. This is a simple concept, but often surge problems are not discovered and addressed until failures occur in the certification tests or field.
Addressing Potential EMI Problems at the Beginning of reverse engineering PCB Saves both Time and Money
Adding TVS protection to the PCB can reduce the time and money that results from adding shields and modifying cables. TVS devices can serve as a low cost preventive tool to reduce the need for expensive system modifications that often are required when EMI problems occur late in the product development cycle.