End of Life USER GUIDE UG:303 PI3749-x0-EVAL1 ZVS Regulators Buck-Boost Evaluation Board Contents Page Introduction 1 Bill of Materials 2 Typical Connections 4 Vicor PCB Edge Connector Description 5 PAD Numbering 5 Schematic Symbol 6 PAD Definitions 6 PCB Design Files 7 Introduction The PI3749-x0-EVAL1 evaluation board demonstrates the features and benefits of the Vicor ZVS Buck-Boost regulator pre-configured for a 24V voltage and rated for over 160W of output power OUT up to 60C and up to 120W at 85C. Please refer to the corresponding PI3749-x0 data sheet for all power specifications. The PI3749-x0-Eval1 evaluation board is used with the following ZVS buck-boost products: PI3749-00, PI3749-20. The evaluation board provides several options for applying input power (VIN and GND) and output load (VOUT and GND). The user can solder tab-style banana jacks or wire, use threaded connectors with retaining nuts or solder turret pins for clip-on connections. The evaluation board comes with all of the PI3749-x0s features accessible to the user. The current-monitor function (IMON) is set-up to monitor the PI3749-x0s output current, sensed across a 5m resistor. The general purpose amplifier (VDIFF) comes pre-set with a gain of 2, but can be easily reconfigured for differential measurements by adding extra 0603 resistors. The I/O pins are brought out to the right edge of the evaluation board to allow for easy monitoring or for adding additional circuitry. The status of the PGD pin is indicated by a dual colored LED red indicating a fault and green indicating no faults. The SYNCO (sync out) and SYNCI (sync in) pins are accessible to allow for paralleling or for synchronizing to an external clock. Shorting J5 on the board will connect the output of IMON to the positive input of the GP amplifier, allowing for user -designed signal scaling and conditioning. A footprint for an external soft-start capacitor (0603) is available to tailor the start-up profile of the converter. The error amplifiers output (EAO) is brought to a pin and in conjunction with the soft-start pin can be used for paralleling converters. The error amplifiers input (EAIN) is not directly connected to a pin, but connects to the pin EXT VREF via a 10k series resistor. Appling a DC voltage to this pin will allow the user to change the regulated output voltage without changing the feedback network. The board is designed with an edge connector to facilitate testing at the factory, but this connection can also be used for board evaluation. The PCB is 4-layer FR-4 170Tg material with 2oz copper per layer, ENIG pad finish and a board thickness of 0.062in. 2 2 The board includes an I C header for use with I C-capable products like the PI3729-20. Note that the 2 I C interface is inhibited by default by 0 resistors installed at RSDA and RSCL (refer to Table 1 Bill of 2 materials). These must be removed to enable I C functionality. UG:303 Page 1End of Life Bill of Materials Table 1 Reference Manufacturer Qty Value Description Manufacturer Bill of materials Designator Part Number populated components C1, C2, C3, C4, C5, Ceramic Cap, X5R, 14 C7, C8, C9, C10, C11, 10F TDK C3216X5R1H106K160AB 50V, 1206 C12, C13, C14, CIN1 Ceramic Cap, X7R, 1 C6 0.1F Murata GRM319R71H104KA01D 50V, 1206 Ceramic Cap, X7R, 1 CCOMP 4.7nF Murata GRM188R71H472KA01D 50V, 0603 Ceramic Cap, X7S, 1 CVDR 0.1F TDK CGA3E3X7S2A104K080AB 100V, 0603 1 x 1mm Dual Color 1 D1 Fault Status Rohm SML-P24MUWT86 SM LED 2 FT1, FT2 TEST 1, TEST 2 SM Testpoint Keystone 5015 2 J5, J6 0.1in Header Jumper Samtec TSW-148-07-F-S FP0404 Series 1 L1 65nH Eaton FP0404R1-R065-R Inductor 1 LMAG 480nH HCV1206 Inductor Eaton HCV1206-R48-R PI3749-x0 1 PCB Edge Connector VICOR PCB0175rC Eval Board ZVS Buck-Boost, Low-Voltage ZVS 1 PI3749 VICOR PI3749-20-LGIZ 2 I C capable B-B SIP 10 x 14mm Resistor, 1%, 1 R5 1.00k Rohm MCR03EZPFX1001 0.1W, 0603 RDIFF1, RDIFF2, REA3, Resistor, 1%, 5 10.0k Rohm MCR03EZPFX1002 RPGD, RSYNCI 0.1W, 0603 Resistor, 1%, 1 REA1 14.0k Yageo RC0603FR-0714KL 0.1W, 0603 Resistor, 1%, 1 REA4 1.07k Yageo RC0603FR-071K07L 0.1W, 0603 Resistor, 1%, 1 RGP 49.9 Rohm MCR03ERTF49R9 0.1W, 0603 Resistor, 1%, 1 RIN 1 Rohm MCR18ERTFL1R00 0.25W, 1206 Resistor, 1%, 1 RSENSE 0.005 Panasonic ERJ-M1WSF5M0U 1W, 2512 Resistor, 1%, 3 RSDA, RSCL, RZ1 0 Rohm MCR03EZPJ000 0.1W, 0603 Dual Schmidt 1 U1 NC7WZ14EP6X Fairchild NC7WZ14EP6X trigger Inverter Non-Populated Components Table 2 Qty Reference Designator Description Non-populated components 3 REA2, RIMON, RZ2 Resistor, 1%, 0.1W, 0603 4 R1, R2, R3, R4 Factory Use Only EAO, EXT VREF, PGD, IMON, SGND1, SGND2, 14 Thru-hole Testpoints, Vector K24C SS/TRK, SYNCI, SYNCO, VDIFF, VDR, VIN, VSN, VSP 3 CEAIN1, CEAO, CTRK Ceramic Cap, 50V, 0603 Bi-Polar Capacitor, 1 CIN2 Nichicon UPW2A330MPD or equivalent 2 JVIN, JVOUT Johnson Jack, Tektronix 131503100 3 ENABLE, FT3, FT4 SM Test Point, Keystone 5015 1 JGP 0.1in Header Jumper UG:303 Page 2