GENERAL DESCRIPTION FEATURES EVALUATION BOARD

Transcription

1 XRP773EVB-DEMO- April 20 Rev..0.0 GENERAL DESCRIPTION The XRP773EVB-DEMO- Demo board is a complete, working, 3 channel, power system measuring.75 x.75 capable of producing over 30 watts. It is optimized to provide 3.3V, 2.5V and V at a maximum of 5 amps per channel. However, using the PowerArchitect TM Configuration and Design software one can program the outputs as desired. An interface board, the Exar Communication Module (XRP77xxEVB-XCM) plugs directly in and provides an interface between your PC and the I 2 C interface of the XRP773. 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 I 2 C interface. Faults, output voltages and currents can also be monitored. Four GPIO signals are available and can be programmed to provide status of power good signals enables and faults. Unused GPIO pins can be programmed as I/O expansion for a microcontroller. EVALUATION BOARD MANUAL FEATURES XRP773 Programmable Controller 3 Channel Power System Wide Input Voltage Range: 4.5V-25V Over 30W Capable Small Form Factor:.75 x.75 I 2 C Interface Programming Monitoring Control EVALUATION BOARD Fig. : XRP773EVB-DEMO- Schematic Exar Corporation Kato Road, Fremont CA 94538, USA Tel Fax

2 XRP773EVB-DEMO- PIN ASSIGNMENT GH LX GL PGND VCCA VIN LDOOUT AVDD DVDD 24 BST GPIO 2 23 PGND2 GPIO GL2 GPIO3 GPIO4 4 5 XRP773 TQFN 5mm x 5mm 2 20 LX2 GH2 GPIO5 6 9 BST2 ENABLE 7 8 VCCD DGND 8 Exposed Pad: AGND 7 BST GH3 LX3 GL3 PGND3 VOUT3 VOUT2 VOUT AGND Fig. 2: XRP773 Pin Assignment PIN DESCRIPTION QFN PIN # PIN NAME DESCRIPTION 30 VIN 29 VCCA 8 VCCD Power source for the internal linear regulators to generate VCCA, AVDD and the Standby LDO (LDOOUT). Place a decoupling capacitor close to the controller IC. Also used in UVLO fault generation if VIN falls below the user programmed limit, all channels are shut down. Output of the internal 5V LDO. This voltage is internally used to power analog blocks. Note that a compensation capacitor should be used on this pin [see Application Note]. Gate Drive input voltage. This is not an output voltage. This pin can be connected to VCCA to provide power for the Gate Drive. VCCD should be connected to VCCA with the shortest possible trace and decouple with a minimum uf capacitor. Alternatively, VCCD could be connected to an external supply (not greater than 5V). 28, 23,3 PGND-PGND3 Power Ground. Ground connection for the low side gate driver. 32 AVDD Output of the internal.8v LDO. A decoupling capacitor should be placed between AVDD and AGND close to the chip (with short traces). DVDD Input for powering the internal digital logic. This pin should be connected to AVDD. 20 Exar Corporation 2/4 Rev..0.0

3 XRP773EVB-DEMO- QFN PIN # PIN NAME DESCRIPTION 8 DGND Digital Ground. This pin should be connected to the ground plane at the exposed pad with a separate trace. 9 AGND 27, 22, 4 GL-GL3 Analog Ground. This pin should be connected to the ground plane at the exposed pad with a separate trace. Output pin of the low side gate driver. Connect directly to the respective gate of an external N-channel MOSFET. 25, 20, 6 GH-GH3 Output pin of the high side gate driver. Connect directly to the respective gate of an external N-channel MOSFET. 26, 2, 5 LX-LX3 24, 9, 7 BST-BST3 2,3,4 GPIO-GPIO3 5,6 GPIO4_SDA, GPIO5_SCL 0,, 2 VOUT-VOUT3 3 LDOOUT 7 ENABLE Exposed PAD AGND Lower supply rail for the high-side gate driver (GHx). Connect this pin to the switching node at the junction between the two external power MOSFETs and the inductor. These pins are also used to measure voltage drop across bottom MOSFETs in order to provide output current information to the control engine. High side driver supply pin(s). Connect BST to an external boost diode and a capacitor as shown in the front page diagram. The high side driver is connected between the BST pin and LX pin. These pins can be configured as inputs or outputs to implement custom flags, power good signals and enable/disable controls. A GPIO pin can also be programmed as an input clock synchronizing IC to external clock. Refer to the GPIO Pins Section and the External Clock Synchronization Section for more information. I 2 C serial interface communication pins. These pins can be re-programmed to perform GPIO functions in applications when I 2 C bus is not used. Voltage sense. Connect to the output of the corresponding power stage. Output of the Standby LDO. It can be configured as a 5V or 3.3V output. A compensation capacitor should be used on this pin [see Application Note]. If ENABLE is pulled high, the chip powers up (logic reset, registers configuration loaded, etc.). If pulled low for longer than 00us, the XRP774 is placed into shutdown. Analog Ground. Connect to analog ground (as noted above for Pin 9). ORDERING INFORMATION Refer to XRP773 s datasheet and/or for exact and up to date ordering information. 20 Exar Corporation 3/4 Rev..0.0

4 XRP773EVB-DEMO- USING THE EVALUATION BOARD INPUT VOLTAGE CONFIGURATION The XRP773EVB-DEMO- Board has several different input voltage options. The Input voltage components are rated at 35V. The power components have been optimized for a 2V input rail. When running the board at an input voltage other than 2V, use PowerArchitect TM to evaluate the system performance. Single Wide Range, Input Voltage Rail As shipped from the factory, the demo board is configured for single input voltage operation. The Input requirements are from 5.5V to 25V input. Single 5V Voltage Rail Installing a zero ohm resistor into position R4 connects VIN to VCCA. This allows operation down to 4.5V, but restricts the maximum input voltage to 5.5V. Dual Voltage Rail Operation The XRP773EVB-DEMO board can be configured to operate from two separate rails. The following modifications must be made: Remove 0 ohm resistor R3 Connect power for the XRP773 between pins VIN and GND Connect channel power between pins VIN and GND Channel Design and Limitations Channel is designed to provide an output voltage from 3.3V to 5.0V. The default voltage is 3.3V. Channel 2 is designed to provide an output voltage from.8v to 2.5V. The default voltage is 2.5V. Channel 3 is designed to provide an output voltage from.9 to.2v. The default voltage is.0v. The Tantalum output capacitor is has a 4V rating. If modifying the channel 3 design, do not exceed four volts unless the cap is replaced. I 2 C INTERFACE The XRP77XX family of controllers employs a standard I2C interface. Pull-ups for the I2C signals are not included on the demo board. If using the demo board with something other than the XRP77xxEVB-XCM, verify that the SDA and SCL lines are pulled up. ENABLE PIN The ENABLE pin connects to an RC network that delays turn on of the device. It is pulled up to AVDD with a 00K resistor and to ground through a.0uf capacitor. It appears on pin 9 of connector CON. This pin can be used to turn on or turn off the device. Operating the Evaluation Board Make sure that the board is configured for the power supply(s) that you are using. Refer to the Input Voltage Configuration section if you require specific board modifications for your application. Apply Power to the board: Please refer to Figure 3 for board connections. If using a single supply, Connect the input supply between the VIN pin and the GND pin. If using a dual supply, Connect the chip power between VIN and GND, and connect Power Vin between the VIN pin and GND. Plug the PowerXR evaluation board on to the XCM as shown below. Insert the USB cable into the computer and the XCM board. Turn on the Power supply Load the PowerArchitect TM software. Select the XRP773EVB configuration and select create configuration.. 20 Exar Corporation 4/4 Rev..0.0

5 XRP773EVB-DEMO- You will be prompted for a filename by a Create New File Dialog box. Navigate to a location to save the configuration, enter a filename and select Save. Refer to the Exar PowerArchitectTM Quick Start Guide for information on how to run the software. 20 Exar Corporation 5/4 Rev..0.0

6 XRP773EVB-DEMO- Figure 3: Board Connections 20 Exar Corporation 6/4 Rev..0.0

7 D D C C B B A A Exar Corporation Kato Road Fremont, CA XRP773EVB-DEMO- 4/2/20 :05:03 AM C:\Users\lbrown.EXAR\Documents\Documents\Eval Boards\XRP773DMO-\Imported XRP773.PRJPCB\XRP773DMO-.Sc Title: Size: Name: Date: File: Rev: Sheet of Time: B.0 XRP773DMO-.SchDoc _2V _8V 2_6V POWERGOOD GPIO2_CLKOUT GPIO3_SYNCOUT GPIO4_SDA GPIO5_SCL ENABLE VCCD VCCD VIN VIN VIN VIN VCCD U4 FDS8984 R C25 000pf U2 FDS8984 R R 0.00 Wurth L 4.9uH PIN 33 Thermal Pad DVDD GPIO0 2 GPIO 3 GPIO2 4 GPIO3 5 GPIO4 6 ENABLE 7 DGND 8 AGND 9 VOU 0 VOUT2 VOUT3 2 PGND3 3 GL3 4 LX3 5 GH3 6 BST3 7 VCCD 8 BST2 9 GH2 20 LX2 2 GL2 22 PGND2 23 BST 24 GH 25 LX 26 GL 27 PGND 28 VCC 29 VIN 30 LDO 3 AVDD 32 GND 33 XRP773ILB-F U XRP773 0V C8 2.2uF C0.0uF D3 SD0CW-7-F 0 C 47uF GPIO U3 FDS8984 R C2 0.0uF C2 uf C28 000pf R V 47uF C5 35V C9 0uF 35V C22 0uf R R Wurth L3 2.0uH 4V C6 00uf C26 uf 6V C 4.7uF 2.5V 330uF C7 R V C7 4.7uF DNP D2 SD0CW-7-F C27 uf R R V C30 0uF 6V C9 4.7uF DNP R C24 000pf C3 0.uF D SD0CW-7-F R C4 0.uF R 0.00 C5 0.uf Wurth L2 3.3uH 6.3V 50uF C2 2_6V _8V _2V 5V_STANDBY Vin _8V 2_6V _2V GH3 LX3 GL3 BST3 GL2 LX2 GH2 BST2 BST GH LX GL DL2 DH2 DL DH DH3 DL3 AVDD 35V C32 0uF VCCA LDO GPIO4_SDA GPIO5_SCL ENABLE VIN CON GND GPIO2 GPIO3 R5 00K C29 0.0uF VOUT2 VOUT VOUT3 35V C23 0uF 35V C20 0uF 35V C3 0uF 0 C4 47uF LDO VIN R4 0.0 DNP VCCA R VIN VIN VIN C6 uf C3 uf C8 uf R R R VCCD GND GND GND GND VOUT3 DNP VOUT2 DNP VOUT DNP PIC0 PIC02 COC PIC20 COC2 PIC202 PIC30 PIC302 COC3 PIC40 PIC402 COC4 PIC50 PIC502 COC5 PIC60 PIC602 COC6 PIC70 PIC702 COC7 PIC80 PIC802 COC8 PIC90 PIC902 COC9 PIC00 PIC002 COC0 PIC0 PIC02 COC PIC20 PIC202 COC2 PIC30 PIC302 COC3 PIC40 PIC402 COC4 PIC50 PIC502 COC5 PIC60 PIC602 COC6 PIC70 PIC702 COC7 PIC80 PIC802 COC8 PIC90 PIC902 COC9 PIC200 PIC2002 COC20 PIC20 PIC202 COC2 PIC220 PIC2202 COC22 PIC230 PIC2302 COC23 PIC240 PIC2402 COC24 PIC250 PIC2502 COC25 PIC260 PIC2602 COC26 PIC270 PIC2702 COC27 PIC280 PIC2802 COC28 PIC290 PIC2902 COC29 PIC300 PIC3002 COC30 PIC30 PIC302 COC3 PIC320 PIC3202 COC32 PICON0 PICON02 PICON03 PICON04 PICON05 PICON06 PICON07 PICON08 PICON09 PICON00 COCON PID0 PID02 COD PID20 PID202 COD2 PID30 PID302 COD3 PIGPIO0 COGPIO PIGPIO20 COGPIO2 PIGPIO30 COGPIO3 PIL0 PIL02 COL PIL20 PIL202 COL2 PIL30 PIL302 COL3 PILDO0 COLDO PIR0 PIR02 COR PIR20 PIR202 COR2 PIR30 PIR302 COR3 PIR40 PIR402 COR4 PIR50 PIR502 COR5 PIR60 PIR602 COR6 PIR70 PIR702 COR7 PIR80 PIR802 COR8 PIR90 PIR902 COR9 PIR00 PIR002 COR0 PIR0 PIR02 COR PIR20 PIR202 COR2 PIR30 PIR302 COR3 PIR40 PIR402 COR4 PIR50 PIR502 COR5 PIR60 PIR602 COR6 PIR70 PIR702 COR7 PIR80 PIR802 COR8 PIR90 PIR902 COR9 PITP0 COTP PITP20 COTP2 PITP30 COTP3 PITP40 COTP4 PITP50 COTP5 PITP60 COTP6 PITP70 COTP7 PIU0 PIU02 PIU03 PIU04 PIU05 PIU06 PIU07 PIU08 PIU09 PIU00 PIU0 PIU02 PIU03 PIU04 PIU05 PIU06 PIU07 PIU08 PIU09 PIU020 PIU02 PIU022 PIU023 PIU024 PIU025 PIU026 PIU027 PIU028 PIU029 PIU030 PIU03 PIU032 PIU033 COU PIU20 PIU202 PIU203 PIU204 PIU205 PIU206 PIU207 PIU208 COU2 PIU30 PIU302 PIU303 PIU304 PIU305 PIU306 PIU307 PIU308 COU3 PIU40 PIU402 PIU403 PIU404 PIU405 PIU406 PIU407 PIU408 COU4 PIVCCA0 COVCCA PIVIN0 COVIN PIVIN0 COVIN PIVOUT0 COVOUT PIVOUT20 COVOUT2 PIVOUT30 COVOUT3 PIC60 PIC70 PIL302 PIR902 PIVOUT30 NL02V PO02V PIC0 PIC20 PIL202 PIR802 PIVOUT0 NL08V PO08V PIC402 PIC50 PIL02 PIR702 PIVOUT20 NL206V PO206V PIC0 PIC20 PIU0 PIU032 NLAVDD PIC2602 PIR90 PIU024 NLBST PIC202 PIR40 PIU09 NLBST2 PIC270 PIR0 PIU07 NLBST3 PIR602 PIU204 NLDH PIR302 PIU304 NLDH2 PIR702 PIU404 NLDH3 PIR002 PIU202 NLDL PIR502 PIU302 NLDL2 PIR202 PIU402 NLDL3 PIC290 PICON09 PIR50 PIU07 NLENABLE PIR60 PIU025 NLGH PIR30 PIU020 NLGH2 PIR70 PIU06 NLGH3 PIR00 PIU027 NLGL PIR50 PIU022 NLGL2 PIR20 PIU04 NLGL3 PIC02 PIC202 PIC302 PIC40 PIC502 PIC602 PIC702 PIC802 PIC902 PIC002 PIC02 PIC202 PIC302 PIC402 PIC502 PIC602 PIC702 PIC802 PIC902 PIC2002 PIC2202 PIC2302 PIC2402 PIC2502 PIC2802 PIC2902 PIC300 PIC30 PIC3202 PICON02 PICON08 PITP0 PITP20 PITP30 PITP40 PIU08 PIU09 PIU03 PIU023 PIU028 PIU033 PIU20 PIU30 PIU40 PIGPIO20 PIU03 NLGPIO20CLKOUT PIGPIO30 PIU04 NLGPIO30SYNCOUT PICON03 PIU05 NLGPIO40SDA PICON0 PIU06 NLGPIO50SCL PIC80 PILDO0 PIU03 NLLDO PO5V0STANDBY PIC260 PIL0 PIR20 PIU026 PIU203 PIU207 PIU208 NLLX PIC20 PIL20 PIR80 PIU02 PIU303 PIU307 PIU308 NLLX2 PIC2702 PIL30 PIR60 PIU05 PIU403 PIU407 PIU408 NLLX3 PIC30 PIR70 PITP50 PIU00 PIC40 PIR80 PITP60 PIU0 PIC50 PIR90 PITP70 PIU02 PIC240 PIR202 PIC250 PIR802 PIC280 PIR602 PICON04 PICON05 PICON06 PICON07 PID02 PIR402 PID202 PIR02 PID302 PIR902 PIGPIO0 PIU02 NLPOWERGOOD PIC90 PIR0 PIR40 PIR502 PIU029 PIVCCA0 NLVCCA PIC30 PIC60 PIC70 PIC80 PID0 PID20 PID30 PIR02 PIU08 NLVCCD PIC00 PIC320 PIR302 PIR402 PIU030 PIVIN0 NLVIN POVin PIC90 PIC200 PIC220 PIC230 PIC3002 PIC302 PICON00 PIR30 PIU205 PIU206 PIU305 PIU306 PIU405 PIU406 PIVIN0 NLVIN POVIN PO02V PO08V PO206V PO5V0STANDBY POVIN POVIN

8 XRP773EVB-DEMO- BILL OF MATERIAL Ref. Qty Manufacturer Part Number Size Component C, C4 2 Murata GRM32ER7A476KE5L 20 Cap, Ceramic 47uF 6V X7R 20 C2 AVX T520B57M006ATE Cap, Tantalum 50uF 0V LOW_ESR, CASE A C3, C6, C8, C2, C26, C27 6 MURATA GRM2BR7H05KA2L 0603 Cap, Ceramic uf 0V X7R 0603 C5 AVX TCJB476M00R Cap, Tantalum 47uF 0V LOW_ESR, CASE A C7, C9 2 Murata GRM2BR7C475KA Cap, Ceramic 4.7uF 0V X7R 0805 C0 Murata GRM88R7H03KA0D 0603 Cap, Ceramic.0uF 50V X7R 0603 C Murata GRM2BR7C475KA Cap, Ceramic 4.7uF 0V X7R 0805 C2, C29 2 Murata GRM88R7H03KA0D 0603 Cap, Ceramic.0uF 50V X7R 0603 C3, C4, C5 3 Murata GRM2BR7H04KA0L 0603 Cap, Ceramic.uF 50V X7R 0603 C6 Murata GRM32EE70G07ME9L 20 Cap, Ceramic 00uF 4V X7U 20 C7 AVX T520B337M2R5ATE Cap, Tantalum 330uF 4V LOW_ESR, CASE A C8 Murata GRM2BR7A225KA0L 0805 Cap, Ceramic 2.2uF 0V X7R 0805 C9, C20, C22, C23, C30, C3, C32 7 Murata GRM32ER6YA06KA2L 20 Cap, Ceramic 0uF 35V X7R 0805, Cap, Ceramic 0uF 35V X7R 20 C24, C25, C28 3 Murata GRM88R7H02KA0D 0603 Cap, Ceramic 000pF 50V X7R 0603 CON Wurth HDR2X5F CONN Header 5x2, 0. inch D, D2, D3 3 Diodes Inc SD0CW-7-F SOD23 Diode, Schottky, 40V 400mW SOD-23 L Wurth WURTH L2 Wurth WURTH L3 Wurth WURTH R, R4, R9, R, R7, R8, R9 7 Vishay/Dale CRCW Z0ED 0603 Resistor, 0.00.W 0603 R2, R3, R5, R6, R7, R8, R0, R2, R6 9 Vishay/Dale CRCW06034R99FKEA 0603 Resistor, 4.99.W 0603, Resistor, 4.99.W 0603 R3 Vishay/Dale CRCW Z0EA 206 Resistor W 206 R4 Vishay/Dale CRCW Z0ED 0603 Resistor, 0.00.W 0603 R5 Vishay/Dale CRCW060300KFKEA 0603 Resistor,.00K W 0603 U Exar Corporation XRP773ILB-F QFN32_5X5 3 Channel 25 V PWM Step Down DC-DC Controller QFN-32 U2, U3, U4 3 Fairchild FDS8984 SOIC - 8 MOSFET, N-Channel 7A SOIC-8 GPIO, GPIO2, GPIO3, LDO 4 Keystone Keystone Test Point TP, TP2, TP3, TP4 4 Keystone Keystone Test Point VCCA, VIN, VIN, VOUT, VOUT2, VOUT3 6 Keystone Keystone Test Point 20 Exar Corporation 8/4 Rev..0.0

9 XRP773EVB-DEMO- EVALUATION BOARD LAYOUT Fig. 3: Component Placement Top Side Fig. 4: Component Placement Bottom Side 20 Exar Corporation 9/4 Rev..0.0

10 XRP773EVB-DEMO- Fig. 5: Layout Top Side Fig. 6: Layout - Bottom 20 Exar Corporation 0/4 Rev..0.0

11 XRP773EVB-DEMO- Fig. 7: Layout Internal Plane Fig. 8: Layout Internal Plane 20 Exar Corporation /4 Rev..0.0

12 EVALUATION BOARD PERFORMANCE (EFFICIENCY) XRP773EVB-DEMO- Fig. 9: All Channels Combined Efficiency Fig. 0: Channel, 3.3V Efficiency Fig. Channel : 2.5V Efficiency Fig. 2: Channel 3, V Efficiency Fig. 3: 5V All Channels Combined Efficiency Fig. 4: 5V Individual Channel Efficiencies 20 Exar Corporation 2/4 Rev..0.0

13 XRP773EVB-DEMO- EVALUATION BOARD PERFORMANCE (LINE LOAD REGULATION) Fig. 5: Line Load Regulation 3.3V Fig. 6: Line Load Regulation 2.5V Fig. 7 Line Load Regulation V 20 Exar Corporation 3/4 Rev..0.0

14 XRP773EVB-DEMO- DOCUMENT REVISION HISTORY Revision Date Description /4/20 Initial release of document BOARD REVISION HISTORY Board Revision Date Description Rev. 09/200 Initial release of evaluation board FOR FURTHER ASSISTANCE Exar Technical Documentation: EXAR CORPORATION HEADQUARTERS AND SALES OFFICES Kato Road Fremont, CA USA Tel.: + (50) Fax: + (50) 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 or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. 20 Exar Corporation 4/4 Rev..0.0

15 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Exar: XRP773EVB-DEMO--KIT