USER GUIDE UG:305 PI3741-0x-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 PAD Definitions 6 PCB Design Files 7 Introduction The PI37410xEVAL1 evaluation board demonstrates the features and benefits of the Vicor ZVS BuckBoost regulator pre configured for either a 24 or 48V output voltage and rated for up to 150W. Please refer to the corresponding PI37410xLGIZ data sheet for all power specifications. The PI37410xEVAL1 evaluation board is used with the following ZVS buck boost products: PI374100LGIZ, PI374101LGIZ. The evaluation board provides several options for applying input power (VIN and GND) and output load (VOUT and GND). The user can solder tabstyle 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 PI3741 0x LGIZs features accessible to the user. The currentmonitor function (IMON) is set up to monitor the PI3741 0x LGIZ s 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 dualcolored 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 between IMON and VSP on the board will connect the output of IMON to the positive input of the general purpose amplifier, allowing for userdesigned 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. Applying 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. UG:305 Page 1Bill 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, X7S, 14 C7, C8, C9, C10, C11, 2.2F TDK C3216X7S2A225K160AB 100V, 1206 C12, C13, C14, CIN1 Ceramic Cap, X7R, 1 CCOMP 4.7nF Murata GRM188R71H472KA01D 50V, 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 0.9H HCV1206 Inductor Eaton HCV1206 R90 R PI37xx xx 1 PCB Edge Connector VICOR PCB0175rD Eval Board Low Voltage ZVS 1 PI3741 ZVS Buck Boost VICOR PI3741 0x LGIZ B B SIP 10 x 14mm Resistor, 1%, 1 R5 1.00k Rohm MCR03EZPFX1001 0.1W, 0603 RDIFF1, RDIFF2, Resistor, 1%, 5 10.0k Rohm MCR03EZPFX1002 REA3, RPGD, RSYNCI 0.1W, 0603 14.0k for Resistor, 1%, Yageo RC0603FR 0714KL PI3741 00 0.1W, 0603 1 REA1 29.1k for Resistor, 1%, KOA Speer RN73H1JTTD2912F50 PI3741 01 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 0.51 Rohm MCR18EZHFLR510 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 Capacitor, X7R 1 CVDR 0.1F Ceramic, 0.1F, Rohm MCH185CN104KK 50V, 0603 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, 14 SGND1, SGND2, SS/TRK, SYNCI, SYNCO, Thruhole test points, V ector K24C VDIFF, VDR, VIN, VSN, VSP 3 CEAIN1, CEAO, CTRK Ceramic Cap, 50V, 0603 1 CIN2 BiPolar Capacitor, 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 1 C6 Capacitor, Ceramic, 1206 1 H1 Factory Test Header UG:305 Page 2