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, lowdropout linear regulators. The three DC/DC converters utilize a high-efficiency, fixed-frequency (2MHz), currentmode 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 PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 1 UG109 Rev 3.0, 25-Sep-2018 Quick Start Required Equipment ACT8865EVK1-305 USB-TO-I2C Dongle Power supply - 5V @ 3A for full power operation Oscilloscope - >100MHz, 4 channels 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 PC USB dongle Figure 2 - EVK Setup Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 2 UG109 Rev 3.0, 25-Sep-2018 Hardware Setup 1. Connect a lab supply between Vin (J9) and GND (J10) to power all the regulators and LDOs. 2. Install shorting jumper on J1 to power REG4 and REG5. 3. Install shorting jumper on J2 to power REG6 and REG7. 4. Connect an appropriate load to each power supply output. 5. Note that the typical setup is to apply the same 5V input voltage to all inputs. GUI Setup (optional) 1. Refer to the end of this document for detailed instructions to install the ACT8865 GUI. 2. Connect the USB-TO-I2C dongle to the computer via a USB cable. 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. ACT8865 Figure 3 - USB-TO-I2C Dongle Connection Turn On the Evaluation board Before applying the input voltage, please make sure the jumper (J11) is installed. When the power source and load are connected to the evaluation board, it can be powered for operation. Perform the following steps to turn on the board. 1. Ensure that the power source voltage is >4.2V and <5.5V. 2. Ensure that nPBIN is not always low and monitor the output voltage from OUT1 to OUT7. 3. Turn on the load, check that it is drawing the proper load current, and verify that the output voltage maintains its regulation. Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 3 UG109 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. Table 1. Recommended Operating Conditions Parameter Description Min Typ Max Unit Vin All buck and LDO input voltages 2.7 5 5.5 V Iout1_max Maximum Buck REG1 load current 1.15 Iout2_max Maximum Buck REG2 load current 1.15 A Iout3_max Maximum Buck REG3 load current 1.3 A Iout4_max Maximum LDO REG4 load current 0.32 A Iout5_max Maximum LDO REG5 load current 0.32 A Iout6_max Maximum LDO REG6 load current OFF A Iout7_max Maximum LDO REG7 load current OFF A A EVK Operation Measuring Output Voltage Ripple To observe the output voltage ripple, place the oscilloscope probe across the output capacitor with the probe ground lead connected to the negative (-) capacitor terminal and the probe tip placed at the positive (+) capacitor terminal. Set the oscilloscope to ac5mV/division, 1us/division time base, and 20MHz bandwidth. A standard oscilloscope probe has a long wire ground clip. For high frequency measurements, this ground clip picks up high frequency noise and injects it into the measured output ripple. Figure 4 shows an easy way to measure the output ripple properly. It requires removing the oscilloscope probe sheath and wrapping an unshielded wire around the oscilloscope probe as short as possible, the true ripple can be measured. Figure 4-Measuring output voltage ripple Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 4 UG109 Rev 3.0, 25-Sep-2018 Test Load Transient Response To test the load transient response, generate a load current transient at the output and observe the output voltage response using an oscilloscope. Attach the current probe to the wire between the output and the load to capture the current transient waveform. The method of testing the output voltage load transient response is the same as that of testing output voltage ripple. Measuring Efficiency The Efficiency is measured by comparing the input power with the output power. Measure the input and output voltage as close as possible to the input and output capacitor to reduce the effect of voltage drops in the PCB and connectors. Test Results Efficiency@Vin=5V 100% Efficiency 80% 60% 40% OUT1 OUT2 20% OUT3 0% 0 200 400 600 800 1000 1200 Output Currentt(mA) CMI 305 PWRHLD start up sequence PWR Startup Sequence 2V/div OUT1 1V/div OUT2 5V/div PWREN 2V/div OUT4 0.5V/div OUT6 2V/div OUT3 0.5V/div 5V/div OUT5 OUT7 2ms/div 20ms/div Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 5 UG109 Rev 3.0, 25-Sep-2018 Load Transient OUT1=1.8V , Iout=0A1.15A Output Voltage Ripple 5mV/div OUT1 20mV/div OUT1 OUT2 5mV/div OUT3 5mV/div IOUT1 1A/div 400 us/div 1us/div Load Transient OUT3=3.3V , Iout=0A1.3A Load Transient OUT2=1.2V , Iout=0A1.15A OUT2 20mV/div IOUT2 1A/div OUT3 50mV/div IOUT3 1A/div 400us/div 400us/div Load Transient OUT5=3.3V , Iout=0A0.32A Load Transient OUT4=2.5V , Iout=0A0.32A OUT4 50mV/div OUT5 50mV/div 200mA/div 200mA/div IOUT5 IOUT4 400 us/div 400 us/div Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 6 UG109 Rev 3.0, 25-Sep-2018 Press S1 for more than 130ms PWREN is always High Press S1 for less than 130ms 2V/div 2V/div OUT1 OUT1 1V/div 1V/div OUT2 5V/div OUT2 5V/div nPBIN nPBIN 5V/div 5V/div nRSTO nRSTO 100ms/div 40ms/div Press S1 for more than 130ms PWREN is always Low Press S2 nPBIN Resistor=51kOhm 2V/div OUT1 1V/div 5V/div nPBIN 5V/div OUT2 5V/div nPBSTAT nPBIN 5V/div 5V/div nRSTO nRSTO 40ms/div 100ms/div Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 7 UG109 Rev 3.0, 25-Sep-2018 Schematic TP15 J9 1 VIN 2 TP16 J10 1 GND 2 C1 C2 C3 4.7F 6.3V 4.7F 6.3V 4.7F 6.3V GND 2 1 J2 TP5 INL45 J1 VIN 2 1 L3 C4 6.3V 2.2F C8 GND INL67 U1 31 26 16 5 6 GND J17 nPBIN 9 11 12 13 10 17 R10 2.54 51K GND S1 20 21 22 S2 0R C14 GND 100nF 6.3V J12 J7 2 1 nPBIN nRSTO nIRQ nPBSTAT PWRHLD PWREN SW3 OUT3 SW2 OUT2 GP2 GP1 VDDREF REFBP C9 47nF 6.3V 23 32 18 25 2 VDDREF REFBP OUT4 OUT5 NC1 NC2 AGND OUT6 OUT7 EP J8 OUT2 2 1 J5 2 1 J6 OUT1 2 1 J3 2 1 J4 TP3 1.5uH 14 C7 GND 28 3 4 7 8 33 GND GND L1 TP1 1.5uH SW1 30 1 29 TP4 22F 6.3V 27 24 GND GND GND L2 SW2 GP3 SW1 OUT1 VSEL SCL SDA 15 19 C6 GND TP2 22F 6.3V GND OUT4 C10 3.3F 6.3V 1 2 TP7 TP8 GND GND nRSTO nIRQ nPBSTAT GND OUT5 C11 3.3F 6.3V J14 J15 OUT3 2 1 ACT8865 VP1 VP2 VP3 INL45 INL67 VIN R9 1 2 3 TP6 22F 6.3V C5 6.3V 2.2F 1 2 1.5uH SW3 PWRHLD TP9 TP10 GND OUT6 C12 GND PWREN 1 2 3.3F 6.3V TP11 TP12 GND J16 GND 1 VSEL 2 J13 GND SCL 1 SDA 2 3 J11 GND 1 2 OUT7 C13 3.3F 6.3V GND R1 R2 R3 R6 R7 R8 R4 R5 10K 10K 10K 10K 10K 10K 10K 10K VIN Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 8 TP13 TP14 UG109 Rev 3.0, 25-Sep-2018 Layout Figure 5 -Layout Assembly Layer Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 9 UG109 Rev 3.0, 25-Sep-2018 Figure 6 -Layout Top Layer Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 10 UG109 Rev 3.0, 25-Sep-2018 Figure 7 - Layout Layer 2 Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 11 UG109 Rev 3.0, 25-Sep-2018 Figure 7 - Layout Layer 3 Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 12 UG109 Rev 3.0, 25-Sep-2018 Figure 8 -Layout Bottom Layer Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 13 UG109 Rev 3.0, 25-Sep-2018 Bill of Materials Table 2. BOM list of EVK board Item Ref Des QTY 1 C1,C2,C3 3 2 C4,C5 2 3 C6,C7,C8 3 4 C9 1 5 C10,C11,C12,C13 4 Description Cap, Ceramic, 4.7uF, 6.3V, 10%, X7R Cap, Ceramic, 2.2uF, 6.3V, 10%, X7R Cap, Ceramic,22uF, 6.3V, 10%, X7R Cap, Ceramic, 47nF, 6.3V, 10%, X7R Cap, Ceramic, 3.3uF, 6.3V, 10%, X7R 6 1 Cap, Ceramic, 100nF, 16V, 10%, X7R 7 C14 J1,J2,J3,J4,J5,J6,J7,J 8,J9,J10,J11,J14,J15, J16,J17 15 Header, 2 pin, 100mil 8 J12,J13 2 Header, 3 pin, 100mil 9 L1,L2,L3 R1,R2,R3,R4,R5,R6,R 7,R8 R9 R10 3 Wurth inductor 1.5uH 8 1 1 2 15 S1,S2 TP1,TP3,TP5,TP7,TP 9,TP11,TP13,TP15 TP2,TP4,TP6,TP8,TP 10,TP12,TP14,TP16 Res, 10k, 1% Res, 0, 1% Res, 51k, 1% SMT Tact switch 4mmx4mmx1.5mm Test Point, Red, Through Hole, 1mm Test Point, Black, Through Hole, 1mm 16 U1 1 17 -- 1 ACT8865QI305-T PCB, ACT8865EVK1305 Rev A 18 -- 3 Jumper, 100mil, Black 10 11 12 13 14 8 8 Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 14 Package MFR Part Number 0805 std std 0805 std std 0805 std std 0603 std std 0603 std std 0603 std std 4mmx4mmx 3.8mm Wurth Elektronik Wurth Elektronik Wurth Elektronik 0603 0603 0603 std std std 4x4x1.5 C&K std std std PTS525SK15SM TR2LFS 0.040" Keystone 5000 0.040" 4x4mm TQFN44-32 Keystone 5001 std std n/a n/a Wurth Elektronik PCB-0308-00 n/a 61300211119 61300211120 74438336015 60900213421 UG109 Rev 3.0, 25-Sep-2018 GUI Installation 1. 2. 3. 4. Contact Active Semi for the GUI files and save them on your computer. Plug the USB-TO-I2C dongle into a free USB port. Follow the instructions in the "How to install driver for dongle" folder. Double click on the ACT8865 GUI.exe to start the ACT8865 GUI. GUI Overview The GUI has 2 basic function buttons allocated in top-left of the Tool Bar which are Read and Write I2C. The GUI contains 2 setting modes: Basic Mode and Advanced Mode. In Basic Mode screen it displays basic user programmable configuration options are programmed using the drop-down boxes or check boxes. Advanced 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 PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 15 UG109 Rev 3.0, 25-Sep-2018 Advanced Mode Click the "Advanced Mode" button in the left of the GUI screen to see all available user programmable options. With Advanced Mode, additional user programmable features can be selected using the button text. In the left side of the Advanced Mode Screen, click on the Tiles Selector to display the register to view or change. Then change a register one bit at a time by clicking on the desired bit. The value of the bit is display right next to the bit-name button. 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 PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 16 UG109 Rev 3.0, 25-Sep-2018 Button Descriptions 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. Read Button Write:Clicking on this button writes the GUI settings to the ACT8865's registers. All registers are written, regardless of whether or not they were changed. Write Button Dongle Connection Status: The GUI also contains a dongle is connected status which indicates that ActiveSemi'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 connected Dongle Disconnected Innovative PowerTM ActiveSwitcherTM is a trademark of Active-Semi. 17