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UG109
Rev 3.0, 25-Sep-2018
ACT8865EVK1-305 User's Guide
Description
This document describes the characteristic and operation of the Active Semi ACT8865EVK1-305 evaluation kit
(EVK). It provides setup and operation instructions, schematic, layout, BOM, and test data. This EVK
demonstrates the ACT8865QI305 ActivePMU power management IC. Other ACT8865QIxxx 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. The EVK features three step-down DC/DC converters and four low-noise, low-
dropout linear regulators. The three DC/DC converters utilize a high-efficiency, fixed-frequency (2MHz), current-
mode PWM control architecture that requires a minimum number of external components. Two DC/DCs are
capable of supplying up to 1150mA of output current, while the third supports up to 1300mA. All four low-dropout
linear regulators are high-performance, low-noise, regulators that supply up to320mA.Note that the
ACT8865AEVK1-305is specifically configured for the ACT8865QI305.
Figure 1 – EVK Picture
Innovative Power
TM
TM
is a trademark of Active-Semi.
ActiveSwitcher
1
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Table of Contents
Related Manuals for Active-semi ACT8865EVK1-305
Summary of Contents for Active-semi ACT8865EVK1-305
- Page 1 ACT8865EVK1-305 User’s Guide Description This document describes the characteristic and operation of the Active Semi ACT8865EVK1-305 evaluation kit (EVK). It provides setup and operation instructions, schematic, layout, BOM, and test data. This EVK demonstrates the ACT8865QI305 ActivePMU power management IC. Other ACT8865QIxxx options can be evaluated on this EVK by replacing the IC and any other necessary components.
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Page 2: Quick Start
Loads – Electronic or resistive. 2A minimum current capability. Digital Multimeters (DMM) Windows compatible computer with spare USB port. E load E load E load DC Power E load USB dongle Figure 2 – EVK Setup Innovative Power is a trademark of Active-Semi. ActiveSwitcher... -
Page 3: Hardware Setup
3. Connect the USB-TO-I2C dongle to the EVK J13 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: Recommended Operating Conditions
Rev 3.0, 25-Sep-2018 Recommended Operating Conditions The ACT8865EVK1-305 is designed for a 5V input voltage. The maximum operating voltage is determined by the IC’s maximum input voltage rating. The minimum operating voltages are determined by the buck converters’ minimum input voltage and by the LDOs’ dropout voltages. Maximum currents are determined by the IC’s CMI settings, which can be changed via I2C after startup. -
Page 5: Measuring Efficiency
Test Results Efficiency@Vin=5V 100% OUT1 OUT2 OUT3 1000 1200 Output Currentt(mA) CMI 305 PWRHLD start up sequence PWR Startup Sequence 2V/div OUT1 1V/div 5V/div OUT2 PWREN 2V/div OUT4 0.5V/div OUT6 2V/div OUT3 0.5V/div 5V/div OUT5 OUT7 2ms/div 20ms/div Innovative Power is a trademark of Active-Semi. ActiveSwitcher... - Page 6 400 us/div 1us/div Load Transient Load Transient OUT3=3.3V , Iout=0A‐1.3A OUT2=1.2V , Iout=0A‐1.15A OUT3 50mV/div OUT2 20mV/div IOUT3 1A/div 1A/div IOUT2 400us/div 400us/div Load Transient Load Transient OUT4=2.5V , Iout=0A‐0.32A OUT5=3.3V , Iout=0A‐0.32A OUT4 OUT5 50mV/div 50mV/div 200mA/div 200mA/div IOUT5 IOUT4 400 us/div 400 us/div Innovative Power is a trademark of Active-Semi. ActiveSwitcher...
- Page 7 OUT2 OUT2 5V/div nPBIN nPBIN 5V/div 5V/div nRSTO nRSTO 40ms/div 100ms/div Press S1 for more than 1 30ms PWREN is always Low Press S2 nPBIN Resistor=51kOhm 2V/div OUT1 5V/div nPBIN 1V/div 5V/div OUT2 5V/div nPBSTAT nPBIN 5V/div 5V/div nRSTO nRSTO 100ms/div 40ms/div Innovative Power is a trademark of Active-Semi. ActiveSwitcher...
- Page 8 REFBP OUT5 OUT4 OUT6 47nF OUT7 6.3V AGND 3.3μF 100nF 6.3V 6.3V nRSTO nIRQ OUT5 nPBSTAT 3.3μF TP10 6.3V PWRHLD OUT6 TP11 3.3μF PWREN TP12 6.3V OUT7 TP13 VSEL 3.3μF TP14 6.3V Innovative Power is a trademark of Active-Semi. ActiveSwitcher...
- Page 9 UG109 Rev 3.0, 25-Sep-2018 Layout Figure 5 –Layout Assembly Layer Innovative Power is a trademark of Active-Semi. ActiveSwitcher...
- Page 10 UG109 Rev 3.0, 25-Sep-2018 Figure 6 –Layout Top Layer Innovative Power is a trademark of Active-Semi. ActiveSwitcher...
- Page 11 UG109 Rev 3.0, 25-Sep-2018 Figure 7 – Layout Layer 2 Innovative Power is a trademark of Active-Semi. ActiveSwitcher...
- Page 12 UG109 Rev 3.0, 25-Sep-2018 Figure 7 – Layout Layer 3 Innovative Power is a trademark of Active-Semi. ActiveSwitcher...
- Page 13 UG109 Rev 3.0, 25-Sep-2018 Figure 8 –Layout Bottom Layer Innovative Power is a trademark of Active-Semi. ActiveSwitcher...
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Page 14: Bill Of Materials
Through Hole, 1mm 0.040" Keystone 5000 TP2,TP4,TP6,TP8,TP Test Point, Black, 10,TP12,TP14,TP16 Through Hole, 1mm 0.040" Keystone 5001 4×4mm ACT8865QI305-T TQFN44-32 PCB, ACT8865EVK1- 305 Rev A PCB-0308-00 Wurth Jumper, 100mil, Black ektronik 60900213421 Innovative Power is a trademark of Active-Semi. ActiveSwitcher... -
Page 15: Gui Installation
Mode contain the button text for changing setting for every single bit. Basic Mode The following figure show the GUI in basic mode. This mode allows the user to easily change one or more IC settings. Innovative Power is a trademark of Active-Semi. ActiveSwitcher... - Page 16 Note that the far right side of the screen contains a scroll down button to scroll down to additional registers since the Tile Screen can only display up to 8 bytes at once. Innovative Power is a trademark of Active-Semi. ActiveSwitcher...
- Page 17 Read: Clicking on this button reads the ACT8865 registers and displays them in the GUI. Note that this reads all registers. Active-Semi recommendsreading registers each time the ACT8865 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.