power protection
17.1 Low VF Schottky power supply anti-reverse connection scheme
This scheme uses three low-voltage drop SKY, which is lower in power consumption than only one SKY, and can prevent overheating of components
(Comparison formula of normal working loss between the two:
1. One SS34LVFA: P=VF * IF=0.42V * 3A=1.26W
2. Use one SS34LVFA: P=VF * IF=0.31V * 1A * 3=0.93W)
For surge protection of DC power supply interface, TVS and SKY devices with appropriate protection current can be selected according to the environment of the power supply
To prevent reverse connection.
Meet ISO61000-4-2 (grade 4) contact discharge 30kV, air discharge 30kV. If it is necessary to meet IEC61000-4-5 surge high level test
Try to select high-power SMC packaging devices.
