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Overview

USB hub that isolates the connected equipment from the computer: a USB isolator and an isolated DC-DC split both sides. Every port is current-limited; an LFP cell with a charger and an STM32G0 keep devices powered and measure their consumption.

Design challenges solved

  1. Data (ADuM3160) and power (isolated DC-DC) isolation with PCB creepage clearances.
  2. Per-port power switches and energy metering.

Key components

ADuM3160USB isolator
TUSB20464-port USB hub
CRE1S0505Isolated DC-DC
TPS2069 ×9Port power switches
BQ25798 · INA228Charger and energy monitor
STM32G0B1Supervisor MCU