Quick Start - Active-semi ACT88325EVK1-101 User Manual

Quick Start

Hardware Connections
Refer to Figure 2 for hardware connections.
1. Decide which voltage will power VIN_IO. Active Semi recommends powering VIN_IO from the VIN input
voltage. Connect a shorting jumper between J10-2 and J10-3 header to power VIN_IO from the VIN
input voltage.
2. Connect a lab supply betweenJ1-1 and J1-2 to power VIN for the buck power supplies. Note that this is
the same input voltage to the LDOs. Separating the buck and LDO input voltage sources requires
careful consideration of startup sequencing.
3. Be careful to keep the input voltage within the specifications.
4. Connect an appropriate load to each power supply output.
5. Optional - Connect the EVK to the PC with the USB dongle.
6. Connect Digital Multi-Meters to the voltages of interest.
7. Apply 3.3V input power.
GUI Setup (optional)
1. Refer to the end of this document for detailed instructions to install the ACT88325 GUI.
2. Connect the USB-TO-I2C dongle to the computer.
3. Connect the USB-TO-I2C dongle to the EVK J14 connector. Refer to Figure 4 to ensure the correct
polarity of the connection. As a guide, use the "Active-Semi" logo on the top of the dongle so the black
wire is connected to the Dongle GND pin.
Innovative Power TM
TM
ActiveSwitcher is a trademark of Active-Semi.
Figure 3 – Shorting Jumper Settings
3
UG125
Rev 1.0, 20-Jun-2018