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Active-semi ACT88325EVK1-101 User Manual

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UG125
Rev 1.0, 20-Jun-2018
ACT88325EVK1-101 User's Guide
Description
This document describes the characteristic and operation of the Active Semi ACT88325EVK1-101 evaluation
kit (EVK).It provides setup and operation instructions, schematic, layout, BOM, and test data. This EVK
demonstrates the ACT88325VA101ActivePMU power management IC. Other ACT88325VAxxx options can be
evaluated on this EVK by replacing the IC and any other necessary components.
Features
The EVK can be used as a standalone board if desired. However, to access the internal registers and to take
full advantage of the IC's capability, the user must connect the EVK kit to a PC with Active Semi's USB-TO-I2C
interface dongle and use the GUI software. The EVK provides full access to the each converter's input and
output voltage, as well as all the digital control signals. This gives the user the flexibility to configure the EVK
to match their real world system.
Note that the ACT88325EVK1-101 is specifically configured for the ACT88325VA101. This CMI option is
configured to power the Silicon Motion 2263 and SM2263XT processors with a 3.3V input.
Figure 1 – EVK Picture
Innovative Power
TM
TM
ActiveSwitcher
is a trademark of Active-Semi.
1

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Summary of Contents for Active-semi ACT88325EVK1-101

  • Page 1 This gives the user the flexibility to configure the EVK to match their real world system. Note that the ACT88325EVK1-101 is specifically configured for the ACT88325VA101. This CMI option is configured to power the Silicon Motion 2263 and SM2263XT processors with a 3.3V input.

  • Page 2: Required Equipment

    UG125 Rev 1.0, 20-Jun-2018 EVK Contents The ACT88325EVK1-101 evaluation kit comes with the following items? 1. EVK Assembly 2. USB-TO-I2C dongle a. Dongle b. Custom 4-pin connector that connects the USB-TO-I2C dongle to the EVK assembly. Required Equipment ACT88325EVK1-101 USB-TO-I2C Dongle Power supply –...

  • Page 3: Quick Start

    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.

  • Page 4: Hardware Configuration

    LDO2_max Hardware Configuration Input Voltage: Note that the ACT88325EVK1-101 uses the ACT88325VA101 IC. This IC can accept up to a 5.5V input voltage. However, the ACT88325VA101 IC is designed for a 3.3V input and shuts off if VIN goes higher than 3.7V. Use the GUI to increase the SYSMON voltage to evaluate input voltages higher than 3.7V.

  • Page 5: Test Results

    BUCK3 Output Voltage Select: Select BUCK3=1.2V by leaving nIRQ, GPIO3, high. Select BUCK3=1.8V by shorting nIRQ to ground. DVS: BUCK2 is 0.9V in normal operation and 0.75V in DVS mode. Pull EXT_PG, GPIO4 to ground to enable DVS mode. Test Results Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 6 UG125 Rev 1.0, 20-Jun-2018 Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 7 UG125 Rev 1.0, 20-Jun-2018 Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 8 VIN_IO nIRQ ACT8311 EXT_PG VOUT B4 0Ohm 2.54 174k 2.54 10uF EXT_EN 22uF 0Ohm EXT_PG 200k 0Ohm 2.54 2.54 AGND AGND FID1 FID2 FID3 MAN,Fiducial MAN,Fiducial MAN,Fiducial Figure 5 – ACT88325EVK1-101 Schematic Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 9 UG125 Rev 1.0, 20-Jun-2018 Layout Figure 6 – Layout Top Assembly Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 10 UG125 Rev 1.0, 20-Jun-2018 Figure 7 – Layout Top Layer Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 11 UG125 Rev 1.0, 20-Jun-2018 Figure 8 – Layout Layer 2 Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 12 UG125 Rev 1.0, 20-Jun-2018 Figure 9 – Layout Layer 3 Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 13 UG125 Rev 1.0, 20-Jun-2018 Figure 10 – Layout Bottom Layer Innovative Power ActiveSwitcher is a trademark of Active-Semi.

  • Page 14: Bill Of Materials

    Yageo TP1, TP3, TP5, TP7 Test Point, Red 0.063" Keystone 5000 TP2, TP4, TP6 Test Point, Black 0.063" Keystone 5001 IC, ACT88325 SCP-36 Active-semi ACT88325VA101-T IC, ACT8311, Buck converter TDFN33-8 Active-semi ACT8311NHADJ-T Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 15 Mode contains the button text for changing setting for every single bit. Basic Mode The following figure shows the GUI in basic mode. This mode allows the user to easily change one or more IC settings. Figure 12 – GUI Basic Mode Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 16 Read: Clicking on this button reads the ACT88325 registers and displays them in the GUI. Note that this reads all registers. Active-Semi recommendspreading registers each time the ACT88325 powers-up to acquire the initial register settings.Active-semi also recommends reading registers after making changes to them.
  • Page 17 Semi’s USB-TO-I2C dongle is connected to the USB port of the driver installed. The figure below shows the two possible indication status graphics. Dongle Dongle Connected Disconnected Figure 16 – Dongle Connection Status Innovative Power ActiveSwitcher is a trademark of Active-Semi.

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