2.3 Power Supply Connections

Isolation requirements mandate separating VDDI from the driver supplies. The decoupling caps for these supplies must be placed as

close to the VDD and GND pins of the Si8239x as possible. The optimum values for these capacitors are 1 μF and 0.1 μF for VDDI and

10 μF and 0.1 μF for each driver supply. Low effective series resistance (ESR) capacitors, such as Tantalum, are recommended.

Si8239x Data Sheet

System Overview

silabs.com | Smart. Connected. Energy-friendly.

Rev. 1.0 | 8