XR77128EVB-DEMO-1

XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board December 2014 Rev. 1.0.0.0 GENERAL DESCRIPTION The XR77128EVB-DEMO-1 board is a complete four channel power system. It is configured to provide 3.3V, 2.5V, 1.5V and 1V at a maximum of 3A, 3A, 5A and 10A loads respectively. The 1.5V and 1V supplies can be adjusted in 2.5mV increments, the 2.5V supply in 5mV increments, and the 3.3V supply is adjustable in 10mV increments. The order and ramp rates for each supply can be programmed to accommodate any sequencing requirement. All power supply operations can be controlled over an I2C interface. Faults, output voltages and currents can also be monitored. Two GPIO and three PSIO signals are available and can be programmed to provide a variety of functions. Unused GPIO/PSIO pins can be programmed as I/O expansion for a microcontroller. The board is supported by PowerArchitectTM 5.2 or later and plugs directly onto the interposer board acting as an interface to an Arduino controller or Exar’s XCM. EVALUATION BOARD MANUAL XR77128EVB-DEMO-1 FEATURES  XR77128 Programmable Controller  4 Channel Power System  Wide Input Voltage Range: 5.5V-25V  I2C Interface  Programming  Remote re-configurability  Monitoring  Control  Arduino GPIO, PSIO and ENABLE control Exar Corporation 48720 Kato Road, Fremont CA 94538, USA www.exar.com Tel. +1 510 668-7000 – Fax. +1 510 668-7001 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board PIN CONFIGURATION Figure 1 XR77128 Pin Assignment PIN ASSIGNMENTS Name Pin Number Description Pin Number Pin Name Description 1 2 3 4 5, 6, 7, 8 9, 10 11, 12 13, 14, 15 16 Output of the standby LDO. This is a micro power LDO that needs to be configured or LDOOUT commanded to turn on. AGND Analog ground pin. This is the small signal ground connection. CPLL Connect to a 2.2nF capacitor to GND. Output of the internal 1.8V LDO. A decoupling capacitor should be placed between AVDD AVDD and AGND close to the chip. VOUT1, VOUT2 Connect to the output of the corresponding power stage. The output is sampled at least VOUT3, VOUT4 once every switching cycle. These pins can be configured as inputs or outputs to implement custom flags, power GPIO0, GPIO1 good signals, enable/disable controls and synchronization to an external clock. SDA, SCL SMBus/I2C serial interface communication pins. Open drain, these pins can be used to control external power MOSFETs to switch loads PSIO0, PSIO1, on and off, shedding the load for fine grained power management. They can also be PSIO2 configures as standard logic outputs or inputs just as any of the GPIOs can be configured, but as open drains require an external pull-up when configured as outputs. DVDD 1.8V supply input for digital circuitry. Connect pin to AVDD. Place a decoupling © 2014 Exar Corporation 2/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board Name Pin Number 17 18, 24, 29, 35 19, 25, 30, 36 20, 26, 31, 37 21, 27, 32, 38 22, 28, 33, 39 23, 34 40 41 42 43 44 45 Description capacitor close to the controller IC. Digital ground pin. This is the logic ground connection, and should be connected to the DGND ground plane close to the PAD. High side driver supply pin(s). Connect BST to the external capacitor as shown in the BST4, BST3 Typical Application Circuit. The high side driver is connected between the BST pin and BST2, BST1 LX pin and delivers the BST pin voltage to the high side FET gate each cycle. GH4, GH3 Output pin of the high side gate driver. Connect directly to the gate of an external NGH2, GH1 channel MOSFET. Lower supply rail for the GH high-side gate driver. Connect this pin to the switching LX4, LX3, LX2, node at the junction between the two external power MOSFETs and the inductor. These LX1 pins are also used to measure voltage drop across bottom MOSFETs in order to provide output current information to the control engine. GL4, GL3, GL2, Output pin of the low side gate driver. Connect directly to the gate of an external NGL1 channel MOSFET. GL_RTN4 GL_RTN3 Ground connection for the low side gate driver. This should be routed as a signal trace GL_RTN2 with GL. Connect to the source of the low side MOSFET. GL_RTN1 Gate Drive supply. Two independent gate drive supply pins where pin 34 supplies drivers 1 and 2 and pin 23 supplies drivers 3 and 4. One of the two pins must be connected to the LDO5 pin to enable two power rails initially. It is recommended that VCCD3-4 the other VCCD pin be connected to the output of a 5V switching rail (for improved VCCD1-2 efficiency or for driving larger external FETs), if available, otherwise this pin may also be connected to the LDO5 pin. A bypass capacitor (>1uF) to the system ground is recommended for each VCCD pin with the pin(s) connected to LDO5 with shortest possible length of etch. If ENABLE is pulled high or allowed to float high, the chip is powered up (logic is reset, ENABLE registers configuration loaded, etc.). The pin must be held low for the XR77129 to be placed into shutdown. Input voltage. Place a decoupling capacitor close to the controller IC. This input is used VCC in UVLO fault generation. Input from the 15V output created by the external boost supply. When this pin goes BFB below a pre-defined threshold, a pulse is created on the low side drive to charge this output back to the original level. If not used, this pin should be connected to GND. External 5V that can be provided. If one of the output channels is configured for 5V, V5EXT then this voltage can be fed back to this pin for reduced operating current of the chip and improved efficiency. LDO5 Output of a 5V LDO. This LDO is used to power the internal Analog Blocks. This is the die attach paddle, which is exposed on the bottom of the part. Connect PAD externally to the ground plane. ORDERING INFORMATION Description Part Number XR77128EVB-DEMO-1 XR77128EVB-DEMO-1-KITA XR77EVB-INT-1 XRP77XXEVB-XCM © 2014 Exar Corporation Evaluation Board Evaluation kit includes XR77128EVB-DEMO-1 Evaluation Board with Power Architect software, interface and Arduino controller boards Interface board (Arduino shield board) designed for use with an Arduino controller and compatible evaluation boards. Also has connectivity for the Exar Configuration Module (XCM) Exar Configuration Module (XCM). USB to I2C interface board. 3/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board USING THE EVALUATION BOARD Load the latest PowerArchitectTM 5 software and run it. INPUT VOLTAGE RANGE The input voltage range of these boards is from 5.5V to 25V. The power components have been optimized for a 12V input rail. When running the board at an input voltage other than 12V, use PowerArchitectTM 5.2 to evaluate the system performance. After selecting the proper family (Chips) and the device (XR77128), select the “Get Started with the EVB-DEMO1” option when prompted as shown below. I2C INTERFACE The XR77128 programmable power controller employs a standard I2C interface. Although the I2C signals can be pulled up to LDO5 on board by means of installing resistors at the locations R25 and R26, the I2C bus signals are pulled up on the controller interface board (XR77EVB-INT-1) by default (refer to Appendix – jumpers installed shorting pins 2 and 3 together at the locations JP6 and JP7). OPERATING THE EVALUATION BOARD When done, click “Create”. PowerArchitectTM 5.2 will load the default configuration automatically. The XR77128EVB-DEMO-1 is designed to be powered from either an AC/DC wall wart (the output voltage must be in the range of the controllers - 5.5V to 25V) connected to the barrel connector or a test bench DC power supply (the voltage must be in the range of the controllers - 5.5V to 25V) connected to the VIN connectors. Apply Power to the board. Please refer to the sections above on how to properly supply power to the board and what voltage range to use. Turn on the Power supply. Use USB cable to connect the computer (type A) and the Arduino controller board (type B). BRING UP PROCEDURE Plug the XR77128EVB-DEMO-1 evaluation board and the Arduino board into the controller interface board as shown below. © 2014 Exar Corporation Go to the Tools tab in PA 5.2 and select Boards. The software will identify communication ports where it found the Arduino controller board. Select the port. 4/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board PA 5.2 is now communicating with the Arduino controller board which is indicated in the lower left corner. Regulation Note that XR77128EVB-DEMO-1 boards will be pre-loaded with the default configuration. To enable channel regulation go to the Tools tab in PA 5.2 and select Dashboard. Channels can be turned on individually if desired. GPIO and PSIO interface The GPIOs, PSIOs and ENABLE can be controlled from the Arduino controller dynamically in the dashboard. In Dashboard turn Group 1 and Group 2 on. The configuration groups the channels 1 and 2 into the group 1, and the channels 3 and 4 into the group 2. The channels are now in regulation as indicated by VOUT readings as well as the in-regulation indicators. ENABLE signal is connected to the Arduino controller board by default (JP2 header is shorted). Arduino drives the ENABLE pin low to place XR77128 into the shutdown mode. It releases the ENABLE pin to enable the device. If leaving the ENABLE pin floating is desired, the jumper at JP2 shall be removed. The PSIOs are not pulled up on XR77128EVBDEMO-1 by default. There is a loading option to pull PSIOs up to LDO5 if desired. To do this, one will need to populate the locations R27, R28, R30. © 2014 Exar Corporation 5/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board EVALUATION BOARD CONNECTIONS main task will be connecting XCM to the evaluation board. The following picture illustrates how VIN supplied from a test bench DC power supply and instruments attached to the outputs would be connected to the XR77128EVB-DEMO-1 board. Using Interface Board If the interface board is available use following steps:    Make sure no Arduino controller board is connected to the interface board Remove I2C pull-up jumpers at location JP6 and JP7 (need to be open in all positions) If the 10-wire ribbon cable is available connect the XCM to the interface board as shown below INTERFACE BOARD CONNECTIONS The following picture illustrates connections on the interface board - XR77EVB-INT-1. Its primary task is to provide interface between the Arduino controller board and EVB. In addition, as explained in the subsequent sections, it can be used to make connection between XCM and EVB using 10-wire ribbon cable.    Use I2C pull-up resistors on XCM (install headers at the locations JP2 and JP3 shorting pins 2 and 3) If 10-wire ribbon cable is not available use 3-wire connection between JP4 pins 1-3 on XCM (pin 1 – SCL; pin 2 – GND; pin 3 – SDA) to test points T23 (SCL), T24 (GND) and T25 (SDA) on the interface board. Make a use of the silkscreen labels on both boards. Connect the interface board and the evaluation board as shown above. Wiring XCM directly to the Evaluation Board Use 3-wire connection between JP4 pins 1-3 on the XCM (pin 1 – SCL; pin 2 – GND; pin 3 – SDA) to the P3 connector on the evaluation board, the pin 8 (GND), the pin 9 (SDA) and the pin 10 (SCL) on the interface board. Make a use of the silkscreen labels on both boards. USING EXAR CONFIGURATION MODULE (XCM) TO COMMUNICATE WITH THE EVALUATION BOARD It is possible to use the XCM (firmware version v62) to communicate with the XR77128EVBDEMO-1 board. PA 5.2 supports XCM. The © 2014 Exar Corporation 6/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board EVALUATION BOARD SCHEMATICS © 2014 Exar Corporation 7/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board BILL OF MATERIAL Ref. Qty Manufacturer Part Number Size Component 1 Exar Corporation 146-6708-01 4.05x2.70in PCB U1 1 Exar Corporation XR77128 TQFN44 Quad PWM/PFM Controller Q1,Q2 2 Fairchild FDMC8200 Power 33 Dual N-Channel Power Trench MOSFET Q3 1 Fairchild FDMC7660 Power 33 N-Channel Power Trench MOSFET Q4 1 Fairchild FDMC8882 MLP 3.3X3.3 N-Channel Power Trench MOSFET Q5 1 Vishay Siliconix SIR474DP PowerPAK SO-8 N-Ch. 30-V (D-S) MOSFET Q6 1 Fairchild FDMS7560S Power 56 N-Channel Power Trench SyncFET L1 1 Wurth Elektronik 744314490 7.0x6.9mm Inductor 4.9uH, 14.5mΩ, 6.5A L2 1 Wurth Elektronik 744314330 7.0x6.9mm Inductor 3.3uH, 9.0mΩ, 9.0A L3 1 Wurth Elektronik 744314200 7.0x6.9mm Inductor 2.0uH, 5.85mΩ, 11.5A L4 1 Wurth Elektronik 7443551130 13.2X12.8mm Inductor 1.3uH, 1.8mΩ, 25A C1, C6, C28, C36 4 Murata Corporation GRM21BR71H105KA12L 0805 Ceramic Capacitor 1µF, 50V, X7R C2, C3, C7, C9, C32, C52 6 Murata Corporation GRM32ER71A476KE15L 1210 Ceramic Capacitor 47µF, 10V, X7R C4 1 Panasonic/Sanyo 35SVPF120M F12 OSCON Capacitor 120µF, 35V C8, C16, C21, C30, C31 5 Murata Corporation GRM32ER71H106KA12L 1210 Ceramic Capacitor 10µF, 50V, X7R C10 1 Murata Corporation GRM188R71H222KA01D 0603 Ceramic Capacitor 2200pF, 50V, X7R C11, C20, C23, C25, C45, C47, C48, C50 8 Murata Corporation GRM188R71H104KA93D 0603 Ceramic Capacitor 0.1µF, 50V, X7R C12, C18, C42, C49 4 Murata Corporation GRM21BR71C475KA73 0805 Ceramic Capacitor 4.7µF, 16V, X7R C14, C15, C17, C19, C22, C40, C41, C43, C46 9 Murata Corporation GRM188R71H103KA01D 0603 Ceramic Capacitor 0.01µF, 50V, X7R © 2014 Exar Corporation 8/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board Ref. Qty Manufacturer Part Number Size Component C24 1 Murata Corporation GRM155R71H103KA88D 0402 Ceramic Capacitor 0.01µF, 50V, X7R C26, C33, C53 3 Panasonic/Sanyo 6TPF330M9L 7343 D3L POSCAP Capacitor 330µF, 6.3V, 9mΩ C39 1 TDK Corporation C3216X7R1V106K160AC 1206 Ceramic Capacitor 10µF, 35V, X7R C44 1 Murata Corporation GRM21BR71C225KA12L 0805 Ceramic Capacitor 2.2µF, 16V, X7R C57 1 Murata Corporation GRM155R71H222KA01D 0402 Ceramic Capacitor 2200pF, 50V, X7R C62 1 Murata Corporation GRM31CR71C106KAC7L 1206 Ceramic Capacitor 10µF, 16V, X7R GC1, GC2 2 Vishay Dale CRCW12060000Z0EAHP 1206 RES 0Ω, 1/2W, SMD GC3, GC4 2 Vishay Dale CRCW12100000Z0EA 1210 RES 0Ω, 1/2W, SMD R6 1 Panasonic ERJ-3RQF2R2V 0603 RES 2.2Ω, 1/10W, 1%, SMD R16, R35, R36, R37, R38, R39 6 Panasonic ERJ-6GEY0R00V 0805 RES 0Ω, 1/8W, SMD JP1, JP2 2 Wurth Elektronik 61300211121 0.20x0.10in Connector, Male Header, 2 Positions, 100mil Spacing, Vertical, TH P1 1 Sullins Connector Solutions SFH11-PBPC-D10-RABK 1.20x0.55in Connector, Female Header, 20 Positions, 100mil Spacing, RA, TH P2 1 Switchcraft RAPC722X 0.60x0.40in Connector, Power Jack Mini R/A, T/H P3 1 Wurth Elektronik 61301511121 1.50x0.10in Connector, Male Header, 15 Positions, 100mil Spacing, Vertical, TH T1, T4, T8, T10, T13, T30 6 Wurth Elektronik 61300111121 0.10x0.10in Square Test Posts, TH T22, T23, T24, T25, T26, T27, T28, T29 8 Wurth Elektronik 7471287 0.32x0.10in Mounting Tabs GND, OUT1, OUT2, OUT3, OUT4, VIN 6 Vector Electronics K30C/M © 2014 Exar Corporation 9/17 Round Test Posts, TH Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board EVALUATION BOARD LAYOUT Figure 2 Component Placement – Top Side © 2014 Exar Corporation 10/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board Figure 3 Layout – Top Layer © 2014 Exar Corporation 11/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board Figure 4 Layout – Bottom Layer © 2014 Exar Corporation 12/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board Figure 5 Layout – Middle Layer 1 © 2014 Exar Corporation 13/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board Figure 6 Layout – Signal Ground Plane © 2014 Exar Corporation 14/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board APPENDIX I – XR77EVB-INT-1 ARDUINO CONTROLLER INTERFACE BOARD SCHEMATICS © 2014 Exar Corporation 15/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board BILL OF MATERIAL - XR77EVB-INT-1 ARDUINO CONTROLLER INTERFACE BOARD Ref. Qty Manufacturer Part Number Size Component 1 Exar Corporation 146-6703-01 4.40x2.10 PCB DS1 1 Wurth Elektronik 150120RS75000 1206 SMD Red Chip LED DS2 1 Wurth Elektronik 150120VS75000 1206 SMD Green Chip LED C1, C2, C3, C4 4 Vishay Sprague 293D226X9010B2TE3 B Tantalum Capacitor 22µF, 10V, 10% R1, R5, R6, R9 4 Panasonic ERJ-6GEY0R00V 0805 RES 0 Ω, 1/8W, 5% SMD R2, R3 2 Panasonic ERJ-6GEYJ122V 0805 RES 1.2kΩ, 1/8W, 5%, SMD R4, R7, R8 3 Panasonic ERJ-6GEYJ472V 0805 RES 4.7kΩ, 1/8W, 5%, SMD SW1 1 Wurth Elektronik 430182050816 6x6mm Tact Switch, SMD CON5 1 Wurth Elektronik 61301021121 0.50x0.20in Connector, Male Header, 10 Positions, Dual Row, 100mil Spacing, Vertical, TH JP1, JP2, JP3, JP4, JP5 5 Wurth Elektronik 61300211121 0.20x0.10in Connector, Male Header, 2 Positions, 100mil Spacing, Vertical, TH JP6, JP7 2 Wurth Elektronik 61300311121 0.30x0.10in Connector, Male Header, 3 Positions, 100mil Spacing, Vertical, TH P1 1 Wurth Elektronik 612020235221 1.20x0.55in Connector, Male Header, 20 Positions, Dual Row, 100mil Spacing, Shrouded, RA, TH P2 1 Wurth Elektronik 653104124022 11x6mm Wire-to-Board Connector, Male, 4 Positions, 1.25mm Spacing, Shrouded, SMT P_IOH1 1 Wurth Elektronik 61301011121 1.00x0.10in Connector, Male Header, 10 Positions, 100mil Spacing, Vertical, TH P_POWER1, P_IOL1 2 Wurth Elektronik 61300811121 0.80x0.10in Connector, Male Header, 8 Positions, 100mil Spacing, Vertical, TH P_AD1 1 Wurth Elektronik 61300611121 0.60x0.10in Connector, Male Header, 6 Positions, 100mil Spacing, Vertical, TH T23, T24, T25 3 Wurth Elektronik 61300111121 0.10x0.10in Square Test Posts, TH © 2014 Exar Corporation 16/17 Rev. 1.0.0 XR77128EVB-DEMO-1 Universal PMIC Quad Output Digital PWM/PFM Demo Board DOCUMENT REVISION HISTORY Revision Date 1.0.0 12/04/2014 Description Initial release of document BOARD REVISION HISTORY Board Revision Date XR77128EVBDEMO-1-01 12/04/14 Description Initial release of the evaluation board FOR FURTHER ASSISTANCE Email: customersupport@exar.com powertechsupport@exar.com Exar Technical Documentation: http://www.exar.com/TechDoc/default.aspx? EXAR CORPORATION HEADQUARTERS AND SALES OFFICES 48720 Kato Road Fremont, CA 94538 – USA Tel.: +1 (510) 668-7000 Fax: +1 (510) 668-7030 www.exar.com NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. or its in all Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. © 2014 Exar Corporation 17/17 Rev. 1.0.0