PCA9306: PCA9306 - If secondary side is powered and primary side loses power will primary side present a load to the PCA9306

Jeff Coletti

Part Number: PCA9306

Hi Support team,

When looking at Figure 7 in the data sheet, if the secondary side(2) has power and the primary side(1) loses power will the primary load down the secondary side?

Thanks

Jeff Coletti

over 6 years ago

0 Clemens Ladisch over 6 years ago

Guru 317060 points

If either Vref is grounded, the switch behaves as an open circuit.

However, if Vref_A is floating, a very small current can flow from Vref_B into Vref_A.

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PCA9306: PCA9306 - If secondary side is powered and primary side loses power will primary side present a load to the PCA9306