hi,
customer asks if they can put a bead in front of Vin as the blue box below.
Any side effect or concern?
BR,
frank
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hi,
customer asks if they can put a bead in front of Vin as the blue box below.
Any side effect or concern?
BR,
frank
Hi Frank,
May I know the background that customer want to put such a bead before Vin pin?
Normally customers will put bead before the input capacitors, like L101 L102 in your shared schematic. The C114 is better to be placed very close to Vin pin as decoupling capacitor.
hi Zack,
not sure why their customer wants to put the bead in front of Vin. The application is for automotive. They are very concern on EMI especial for <1MHz.
BR,
frank
Hi Frank,
There is no need to put a bead before VIN pin. The VIN pin only flows through very few current (~ uA).