PI3421-00-EVAL1 Vicor

USER GUIDE UG:302 PI33xx-xx-EVAL1 & PI34xx-xx-EVAL1 ZVS Regulators Buck Evaluation Board Contents Page Introduction Introduction 1 The PI33xx-xx-EVAL1 and PI34xx-xx-EVAL1 evaluation board demonstrates the features and benefits Evaluation Board Supply of the ZVS Buck Regulator PI33xx and PI34xx families. The board features the ZVS Buck Regulator SiP, & Load Connections 4 along with inductor, ceramic input and output capacitors. Bills of Materials 7 The evaluation board provides several options for making input power (V and GND) and output load IN (V and GND) connections. The user can solder tab style banana jacks or wire, use threaded binding OUT Evaluation Board Notes 13 posts secured by a retaining nut, or to simply use a 6 nut and bolt connection. All the I/O pins are labeled and routed to the board edge for easy access. Each I/O pin is accompanied with an adjacent 50mil through-hole for adding a test point or to facilitate wiring to external circuitry. The board has a scope tip jack for measuring output voltage (V ), and has locations for two optional OUT jacks for measuring V and the switching node of the regulator (See Figure 4). There are two headers IN installed: an ENABLE jumper which can be used to enable or disable the converter and the remote sense jumper that will connect the bucks remote sense pin to the output at the V terminal. OUT 2 For PI33xx-20 regulators only, there is a 4-pin I C header that allows users to set certain device parameters and to read the fault registers of the regulator. Each regulator can be assigned an address from 0 to 7 using the two tri-state address pins (ADR0 and ADR1). Connections required for parallel regulator operation are grouped together (labeled Current Sharing) to allow for easy connection between evaluation boards. There is a zero ohm jumper between SYNCI and SGND to ensure that SYNCI is grounded when not used. This resistor must be removed for interleaved operation. Please refer to the product data sheet for more detailed information on paralleling and on interleaving units. There are two unpopulated resistor footprints (RADJ1 and RADJ2) used in trimming the output voltage and a capacitor footprint (CTRK) to add additional capacitance to the output tracking pin. Please refer to the product datasheet for more detailed information on these topics. The evaluation board is constructed using 4 layers of 2oz copper and is routed to optimize the regulation path between input and output voltage, which reduces the parasitic losses and yields the best efficiency. UG:302 Page 1Table 1 Product Part Number Evaluation Board Number PCB Part Number Applicable evaluation board, PI3301-00-LGIZ PI3301-00-EVAL1 PCB0108 product part numbers, PI3301-01-LGIZ PI3301-01-EVAL1 PCB0113 and associated evaluation PI3302-00-LGIZ PI3302-00-EVAL1 PCB0108 PCB number PI3302-03-LGIZ PI3302-03-EVAL1 PCB0190 PI3303-00-LGIZ PI3303-00-EVAL1 PCB0108 PI3303-20-LGIZ PI3303-20-EVAL1 PCB0108 PI3305-00-LGIZ PI3305-00-EVAL1 PCB0108 PI3311-00-LGIZ PI3311-00-EVAL1 PCB0113 PI3311-01-LGIZ PI3311-01-EVAL1 PCB0113 PI3312-00-LGIZ PI3312-00-EVAL1 PCB0108 PI3312-01-LGIZ PI3312-01-EVAL1 PCB0113 PI3318-00-LGIZ PI3318-00-EVAL1 PCB0113 PI3318-01-LGIZ PI3318-01-EVAL1 PCB0113 PI3420-00-LGIZ PI3420-00-EVAL1 PCB0113 PI3421-00-LGIZ PI3421-00-EVAL1 PCB0113 PI3422-00-LGIZ PI3422-00-EVAL1 PCB0113 PI3423-00-LGIZ PI3423-00-EVAL1 PCB0113 PI3424-00-LGIZ PI3424-00-EVAL1 PCB0113 Figure 1 Evaluation board (PCB 0108) UG:302 Page 2