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Active-semi ACT4910EVK1-121 User Manual

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UG-106
Rev 1.0, 16-November-2017
ACT4910EVK1-121 User's Guide
Description
This document describes the characteristic and operation of the Active Semi ACT4910EVK1-121 evaluation kit
(EVK). It provides setup and operation instructions, schematic, layout, BOM, and test data. This EVK
demonstrates the ACT4910QW121 eFuse power management IC. Other ACT4910QWxxx 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 ACT4910EVK1-121 is specifically configured for the
ACT4910QW121 IC.
Figure 1 – EVK Picture
Innovative Power
TM
ActiveSwitcher
TM
is a trademark of Active-Semi.
1

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Summary of Contents for Active-semi ACT4910EVK1-121

  • Page 1 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 ACT4910EVK1-121 is specifically configured for the ACT4910QW121 IC.
  • Page 2 Power supply – 12V @ 4A for full power operation Oscilloscope – >100MHz, >2 channels Loads – Electronic or resistive. 4A minimum current capability. Digital Multimeters (DMM) Windows compatible computer with spare USB port. EVK Setup Figure 2 – EVK Setup Innovative Power ActiveSwitcher is a trademark of Active-Semi.

  • Page 3: Hardware Setup

    3. Connect the USB-TO-I2C dongle to the EVK J4 connector. Refer to Figure 3 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 toward the lower left corner of the Dongle.

  • Page 4: Jumpers And Connectors

    The EVK contains a non-populated input snubber. If testing with long, inductive cables, populating the snubber with the appropriate values will reduce overshoot when the input is hot plugged. 1nF and 10Ω are good starting points. Innovative Power ActiveSwitcher is a trademark of Active-Semi.

  • Page 5: Test Results

    UG-106 Rev 1.0, 16-November-2017 Test Results Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 6 UG-106 Rev 1.0, 16-November-2017 Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 7 UG-106 Rev 1.0, 16-November-2017 Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 8 47nF 47μF 47μF 47μF 47μF 47μF 47μF 47μF nIRQ nIRQ 11.5K PG_STR PG_STR nIRQ LED1 BSET COMP 2.2K 2.2K 2.2K VIO_IN 1μF 0.1μF 100pF 6.8nF TP7 TP8 Figure 4 – ACT4910EVK1-121 Schematic Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 9 UG-106 Rev 1.0, 16-November-2017 Layout Figure 5 – Layout Top Layer Figure 6 – Layout Bottom Layer Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 10 UG-106 Rev 1.0, 16-November-2017 Figure 7 – Layout Power Figure 8 – Layout GND Innovative Power ActiveSwitcher is a trademark of Active-Semi.

  • Page 11: Bill Of Materials

    Wurth Elektronik  61300411121  26  J5,J6  2  Header, 2 pin, 100mil    Wurth Elektronik  61300211121  Test Point, Red, Through Hole,  27  TP1, TP3,TP5  3  1mm  0.040"  Keystone  5000  Test Point, Black, Through  28  TP2,TP4,TP6,TP7,TP8  5  Hole, 1mm  0.040"  Keystone  5001  29  U1  1  ACT4910QM‐121  QFN28  Active‐semi    Innovative Power ActiveSwitcher is a trademark of Active-Semi.

  • Page 12: Gui Installation

    2. Plug the USB-TO-I2C dongle into a free USB port. 3. Follow the instructions in the “How to install driver for dongle” folder. Figure 9 – Dongle Driver 4. Double click on the ACT4910 GUI.exe to start the ACT4910 GUI. Innovative Power ActiveSwitcher is a trademark of Active-Semi.

  • Page 13: Gui Overview

    The following figure show the GUI in basic mode. This mode allows the user to easily change one or more IC settings. Read Icon Write Icon Figure 10 – GUI Basic Mode Innovative Power ActiveSwitcher is a trademark of Active-Semi.
  • Page 14 Read: Clicking on this button reads the ACT4910 registers and displays them in the GUI. Note that this reads all registers. Active-Semi recommends reading registers each time the ACT4910 powers-up to acquire the initial register settings. Active-semi also recommends reading registers after making changes to them. Immediately reading the registers after a write confirms the changes were properly stored.
  • Page 15 Rev 1.0, 16-November-2017 Write: Clicking on this button writes the GUI settings to the ACT4910’s registers. All registers are written, regardless of whether or not they were changed. Figure 13 – Write Button Innovative Power ActiveSwitcher is a trademark of Active-Semi.

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