Lightning protection scheme for outdoor equipment DC 48V60V power supply
Lightning protection scheme for DC 48V/60V power supply of outdoor equipment
Shanghai Leiditech Electronics recommends a lightning protection scheme for outdoor equipment DC 48V (or 60V) power supply.There are four options to choose from:
1、 Traditional protection plan
Figure1
2、 Simplified protection plan
2.1: Using two SM8S33CA or SM8S30CA of Leiditech in series, it can withstand 4KV
Figure 2
2.2: Using a single AK3-058C from Leiditech, it can pass 6KV
2.3 Using a single LTKAK10-058C from Leiditech, it can withstand 20KV
If you want to test common mode surges, please add GDT: 2R090-5S and connect it to GND to the ground, as shown in Figure 1
1、 Plan analysis
|
|
Advantages |
Disadvantages |
Using the Leiditech model |
|
Option 1 |
It is a layered and graded protection, where lightning surge is decomposed layer by layer, and the protection IC can be arranged by reducing it to the final TVS |
There are many component models, and the matching between component parameters needs to be good. The PCB board space needs to be relatively large, and the cost of product stacking is high |
14D820K, 2R090-5S, SMDJ58CA |
|
Option 2.1 |
Capable of withstanding lightning surge 4KV |
Large volume, relatively high cost, and two TVS connected in series can easily result in larger errors |
SM8S33CA, SM8S30CA |
|
Option 2.2 |
Able to withstand lightning surge 6KV |
Large volume and high cost |
AK3-058C |
|
Option 2.3 |
Able to withstand lightning surge 20KV |
Large volume and high cost |
LTKAK10-058C |
The specifications for Leiditech are as follows:
Shanghai Leiditech brand Leiditech can provide various interface electrostatic lightning protection solutions to solve electromagnetic compatibility problems for customers. For more protection solutions, please search for the mini program "EMC Electromagnetic Compatibility Community" on WeChat. Welcome to contact Hu Gong 18016225001