SmartUSBHub Pro 7CH USB2.0 User Guide

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This document applies to: SmartUSBHub Pro 7CH USB2.0

Last updated on: June 4, 2026

Overview

SmartUSBHub Pro 7CH USB2.0 is a 7-channel programmable USB 2.0 High-Speed hub. Each downstream port supports independent VBUS power control, USB 2.0 data-line control, voltage/current sensing, and overcurrent status monitoring. It is designed for automated testing, embedded development, production validation, and remote multi-device management.

Key Features

• 7 USB 2.0 downstream ports, supporting High-Speed 480 Mbps and backward compatibility with Full-Speed, Low-Speed, and USB 1.1 devices.

• Independent per-channel power control for software-driven power cycling and hot-plug simulation.

• Independent per-channel USB 2.0 data-line control, allowing the data link to be disconnected while power remains enabled.

• Per-channel voltage/current sensing for power logging, abnormal-current detection, and automated test decisions.

• V3 measurement stream support for continuous measurement data output, real-time plotting, and higher-rate sampling workflows.

• Overcurrent status monitoring. oc_monitor_usb2_7p.py applies only to this model.

• Normal mode, interlock mode, and configurable device addresses for multi-hub setups.

Interfaces

Interface	Quantity	Description
USB-C upstream data port	1	Connects to the host for USB 2.0 hub data transfer
USB-C command port	1	Connects to the host for USB-CDC control commands
USB-A downstream ports	7	Connect USB devices under test
DC input	1	External power input, typically 20 V

[!NOTE]

To use both USB data transfer and software control, connect both the upstream data port and the command port to the host.

Hardware Specifications

Parameter	Specification
USB standard	USB 2.0 High-Speed
Downstream ports	7
Upstream interfaces	USB-C data port + USB-C command port
Hub controller	CH338F
Main MCU	CH32X035G8U6
Operating temperature	0 ~ +50 °C
DC input voltage	20 V typ, 9 V min
DC input current	5 A typ, 10 A max
5V output voltage	5.28 V typ
Total 5V output current	16 A max, shared by all downstream ports
5V full-load output ripple	10 mV typ
Typical per-port charging current	1.5 A, BC 1.2 CDP
Default per-port protection limit	2.7 A typ
Overcurrent protection response	4 ~ 7 ms
ESD protection on all USB ports	Fast response time; JESD22-A114-B HBM Class 3B; IEC 61000-4-2 Level 4

Voltage/Current Sensing

Parameter	Specification
Current measurement range	0 ~ 2.7 A per channel
Current resolution	1 mA/LSB
Current measurement error	±5 mA typ + ±0.2% FS
Voltage measurement range	0 ~ 26 V
Voltage resolution	8 mV/LSB
Effective sampling rate	About 100 Hz, polling 7 channels

Applicable Examples

The following examples apply to this model:

• examples/power_control_example.py

• examples/cycle_all_channels.py

• examples/set_default_power_dataline_on.py

• examples/advanced/dataline_control_example.py

• examples/advanced/power_measurement_oneshot.py

• examples/advanced/power_measurement_stream.py

• examples/advanced/oscilloscope.py

• examples/advanced/oscilloscope_stream.py

• examples/advanced/oc_monitor_usb2_7p.py

Use hub.get_channels() in software to get the channel list. For this model, the channel list is typically (1, 2, 3, 4, 5, 6, 7).

Notes

• Measurement-related examples must enable channel power before reading voltage/current.

• oscilloscope_stream.py and power_measurement_stream.py use the V3 measurement stream and only apply to devices that support stream mode.

• oc_monitor_usb2_7p.py is only for SmartUSBHub Pro 7CH USB2.0.

• The default per-port protection limit does not mean that all ports can reach that current simultaneously. Total 5V output current is 16 A, shared by all downstream ports.

• Overcurrent, short-circuit, and thermal tests should use suitable cables, loads, and power supplies, and must stay within the device ratings.