Prevent any annoying plop occurring in speakers when switching the car booster on and off. In addition, it provides protection for the MOSFET transistors and the car battery (monitoring the voltage drop). The entire circuit can be built into the car booster housing.
|
Tekniske detaljer:
- soft start of the switched mode power supply
- switch-on delay of the speakers: ± 2 seconds
- immediate switch-off of the speakers when switching off the booster
- voltage monitor: switch off at +/- 10V
- PCB dimensions: 57 x 51mm (2.2" x 2.0")
|
- Hints
-
- When protection works to early due to voltage drop of the battery, please change ZD1 and ZD2 by 9.1 or 8.2V type.
- When the power supply is not stable, change C5 and C6 by 47µF.
|
