PI2126 Evaluation Board User Guide
Contents
1. 2 Hook Up of the Evaluation Board 2 1 Connect the positive terminal of PS1 power supply to Vin1 Connect the ground terminal of PS1 to Gnd Set the power supply to 12V Keep PS1 output disabled off 2 2 Connect the positive terminal of PS2 power supply to Vin2 Connect the ground terminal of PS2 to Gnd Set the power supply to 12V Keep PS2 output disabled off 2 3 Connect the electronic load to the output between Vout and Gnd Set the load current to 5A 2 4 Enable turn on PS1 power supply output 2 5 Turn on the electronic load 2 6 Verify that Vout voltage is a few millivolts below 12V This verifies that the PI2126 U1 internal MOSFET is in conduction mode 2 7 Verify that Vin2 is low This verifies that the PI2126 U2 internal MOSFET is off 2 8 Enable turn on PS2 output 2 9 Verify that both PS1 and PS2 are sharing load current evenly by looking at the supply current Power supplies output may need adjustment to set current sharing between the supplies 2 10 Disable turn off PS1 and PS2 outputs 2 11 Enable turn on PS2 output 2 12 Verify that the electronic load voltage reading is few millivolts below 12V This verifies that the PI2126 U2 internal MOSFET is in conduction mode 2 13 D2 should be off This verifies that there is no fault condition 2 14 Verify that Vin1 is low This verifies that the PI2126 U1 internal FET is off Note When the PI2126 internal MOSFET is in2. on and sharing the load current then applied a short between Vini and Gnd for Ims _ Vin1 5V div Test purpose To show the PI2126 response to a fault condition where the output of the input source is shorted or tried to source current from the load Vout lt f WAN ag lt lt MA N Ag Aan ee 7 ra c YA AH KN SEERE mpe m dejt ka WAWAN AAA WEE Linea Rp EEATT aea i i v 5 00v 5 00v 500A Z 40 0ns W2 50GS s oov Max 19 4 V u v0 00000s 10M points Min 17 4V 13 May 2010 15 18 12 Figure 4 Plot of PI2126 response time to reverse current detection 432 C Figure 5 PI2126 mounted on P1I2126 EVAL1 lout 12A Figure 6 PI2126 mounted on PI2126 EVAL1 lout 12A T 25 C Air Flow OLFM TA 25 C Air Flow 200LFM Picor Corporation e picorpower com PI2126 EVAL1 User Guide Rev 1 0 Page 6 of 8 1 200 0 200 si Taa 0 000 L Or e Q O m tS ui L 7 oS RB E kN ra ci 4 Figure 9 PI2126 EVAL1 evaluation board mechanical drawing Picor Corporation e picorpower com PI2126 EVAL1 User Guide a lt a o Rev 1 0 1 600 0 700 0 300 0 200 0 000 A10 00804 Page 7 of 8 Warranty Vicor products are guaranteed for two years from date of shipment against defects in material or workmanship when in normal use and service This warranty does not extend to products subjected to misuse accident or impro
3. Cool ORing SiP Table 3 Component functional description Electronic PS1 0 20V 15A me Pn Load e U2 i 25A c2 SRD PS2 Smi Ti as acn Fro 0 20V 15A 02 R6 PI2126 EVAL1 Rosjon DC 05 2010 Figure 3 Layout configuration for typical redundant power application using P12126 01 LGIZ Test Procedure Initial Test Set Up Baseline Test Procedure PI2126 Refer to Figure 3 PI2126 EVAL1 designed with two input bias 1 Recommended Material configurations VC biased via external resistors R1 and 1 1 Material Needed Picor supplied R2 or VC biased via the internal resistor VR input pin 1 1 1 PI2126 EVAL1 Reias 4200 30 PI2126 EVAL1 is configured with 1 1 2 PI2126 Product Datasheet the internal bias resistors R3 and R4 are installed where R1 and R2 were not installed If external VC bias resistor with higher accuracy is desire remove R3 and R4 before installing R1 and R2 1 2 Recommended Users Supplied Equipment 1 2 1 Two DC power supplies 0 20V 15A each 1 2 2 One low power logic voltage power supply 1 2 3 Load electronic Load Power resistors or actual load 1 2 4 Multimeter 1 2 5 Oscilloscope 1 2 6 Appropriately sized interconnect cables 1 2 7 Safety glasses Picor Corporation e picorpower com PI2126 EVAL1 User Guide Rev 1 0 Page 4 of 8 Before initial power up follow these steps to configure the evaluation board for specific end application requirements
4. 26 can be completed on the PI2126 EVAL1 evaluation board in addition to using the key features of the product Dynamic testing can be completed under a variety of system level fault conditions to check for response time to faults This document provides basic instructions for initial start up and configuration of the evaluation board Further information on the functionality of the PI2126 can be found in the PI2126 product datasheet PI2126 EVAL1 User Guide Rev 1 0 Page 1 of 8 Cool ORing PI2126 Product Description The PI2126 Cool ORing is a complete full function Active ORing solution with a high speed ORing MOSFET controller and a very low on state resistance MOSFET designed for use in redundant power system architectures The PI2126 Cool ORing solution is offered in an extremely small thermally enhanced 5mm x 7mm LGA package and can be used in high side medium voltage Active ORing applications The PI2126 enables extremely low power loss with fast dynamic response to fault conditions critical for high availability systems The PI2126 with its 30V 5 5mQ_ internal MOSFET provides very high efficiency and low power loss during steady state operation while achieving high speed turn off of the internal MOSFET during input power source fault conditions that cause reverse current flow The PI2126 provides an active low fault flag output to the system during reverse current excessive forward over current and UVLO fault conditio
5. A Vicor Subsidiary P12126 EVAL1 Cool ORing Series P12126 EVAL1 30V 12A Full Function High Side Active ORing Evaluation Board User Guide Content Page Introduction lec ecco cous taietdecmerchseens teas ene nana aana anana aana anane ee ene 1 Product Description s essssseressssrererssssererssssereresssereressserreesssenee 2 SENG eer ee er cnn en nn ere a a A rr daa aa ba aaa a As 3 Bill of Material a csisssntansiticonscsniinsaneininonsanniasattantisiennnanniesmniininnnnaniiwsatinnsitions 3 Test Procedure rarer errr corere reremetrr rs er eaaa anaa re etn 4 Recommended Material ase deisviatiniaveraenisvendsuiavendeutsveatiuiaderaentavenians 4 Thermal Imaging pee cosctivrcanenssivacnemsimnrnapsionretenninracnbawnconuuncasveneniiina 6 PCB Bea rr saang nemo am aaa a aha aa aa ae a aa aa E ey aa a ee 7 Mechanical Drawing 00oesesenenaneenenenenanann nana n anana nana anane ee ene 7 The PI2126 EVAL1 Evaluation Board is intended to acquaint the user with the benefits and features of the Cool ORing P12126 full function Active ORing solution It is not designed to be installed in end use equipment Please read this document before setting up the PI2126 EVAL1 Evaluation Board and refer to the PI2126 product datasheet for device specifications functional description and characteristics During operation the Introduction The PI2126 EVAL1 allows the user to test the basic principles and oper
6. ational characteristics of an Active ORing function in a redundant power architecture while also experiencing the benefits and value of the PI2126 solution versus conventional Active ORing solutions The PI2126 EVAL1 evaluation board is configured to receive two independent power source inputs per a_ typical redundant power architecture through two Active ORing channels that are combined to form a redundant power output Each channel is capable of up to 12A and is suitable for 12V redundant bus voltages The PI2126 EVAL1 evaluation board is designed with optimized PCB layout and component placement to represent a realistic high density final design for an embedded Active ORing solution for 12V BUS applications Picor Corporation e picorpower com P12126 EVAL1 Evaluation Board featuring the Cool ORing PI2126 Full Function Active ORing Solution power devices and surrounding structures can be operated safely at high temperatures Remove power and use caution when connecting and disconnecting test probes and interface lines to avoid inadvertent short circuits and contact with hot surfaces When testing electronic products always use approved safety glasses Follow good laboratory practice and procedures requiring up to 12A This evaluation board is intended as an easy and simple way to test the electrical and thermal performance of the PI2126 Full Function Active ORing solution Both dynamic and steady state testing of the PI21
7. d Conditions of Sale the user of Vicor components in life support applications assumes all risks of such use and indemnifies Vicor against all damages Vicor s comprehensive line of power solutions includes high density AC DC and DC DC modules and accessory components fully configurable AC DC and DC DC power supplies and complete custom power systems Information furnished by Vicor is believed to be accurate and reliable However no responsibility is assumed by Vicor for its use Vicor components are not designed to be used in applications such as life support systems wherein a failure or malfunction could result in injury or death All sales are subject to Vicor s Terms and Conditions of Sale which are available upon request Specifications are subject to change without notice Vicor Corporation Picor Corporation 25 Frontage Road 51 Industrial Drive Andover MA 01810 North Smithfield Rl 02896 USA USA Customer Service custserv vicorpower com Technical Support apps vicorpower com Tel 800 735 6200 Fax 978 475 6715 Picor Corporation e picorpower com PI2126 EVAL1 User Guide Rev 1 0 Page 8 of 8
8. ns Figure 1 shows a photo of the PI2126 EVAL1 evaluation board with two PI2126 SiPs used to form the two Active ORing channels The board is built with two identical Active ORing circuits with options and features that enable the user to fully explore the capabilities of the P12126 Cool ORing solution PICOR a Cool ORing 2 0 PI2126 EVAL1 Gnd cme Vout Figure 1 P12126 EVAL1 Evaluation Board 1 8 x 1 8 Terminals Maximum Rating Vin1 Vin2 15V 12A Vout 15V 24A FT1 FT2 20V 10mA Terminal Description Vin1 Power source Input 1 or bus input designed to accommodate up to 15V and 12A continuous current Vin2 Power source Input 2 or bus input designed to accommodate up to 15V and 12A continuous current FT1 PI2126 U1 Fault pin referenced to the Gnd terminal Gnd FT2 PI2126 U2 Fault pin referenced to the Gnd terminal Gnd Vout Output U1 and U2 D pins connection connect to the load high side S1andD1 U1 Source to Drain Kelvin test points S2 and D2 U2 Source to Drain Kelvin test points Return Connection Four Gnd connections are available and are connected to a common point the Ground plane Input supplies Vin1 Vin2 and the output load at Vout should all be connected to their respective local Rtn connection Note Gnd Gnd and Gnd are connected to the same point at the PCB bottom layer Table 1 PI2126 EVAL1 Evaluation Board Terminals Description Picor Cor
9. per application or maintenance Vicor shall not be liable for collateral or consequential damage This warranty is extended to the original purchaser only EXCEPT FOR THE FOREGOING EXPRESS WARRANTY VICOR MAKES NO WARRANTY EXPRESS OR LIMITED INCLUDING BUT NOT LIMITED TO THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Vicor will repair or replace defective products in accordance with its own best judgment For service under this warranty the buyer must contact Vicor to obtain a Return Material Authorization RMA number and shipping instructions Products returned without prior authorization will be returned to the buyer The buyer will pay all charges incurred in returning the product to the factory Vicor will pay all reshipment charges if the product was defective within the terms of this warranty Information published by Vicor has been carefully checked and is believed to be accurate however no responsibility is assumed for inaccuracies Vicor reserves the right to make changes to any products without further notice to improve reliability function or design Vicor does not assume any liability arising out of the application or use of any product or circuit neither does it convey any license under its patent rights nor the rights of others Vicor general policy does not recommend the use of its components in life support applications wherein a failure or malfunction may directly threaten life or injury Per Vicor Terms an
10. poration e picorpower com PI2126 EVAL1 User Guide Rev 1 0 Page 2 of 8 Not installed Not installed ANNNNANARAN Not installed ANNNANNAURAMN Figure 2 PI2126 EVAL1 Evaluation Board schematic Reference Designator C1 C2 C3 C4 C C D1 D2 5 FT1 FT2 S1 S2 D1 D2 Vin1 Vin2 Vout Vout 7 7 7 7 1 2 R5 R6 20KQ Resistor 1 5K 1 0603 Pe KENEN 12A 30V Full Function 10 1 U1 U2 P12126 00 LGIZ 5mm x 7mm 25 pin PICOR Cool ORing Solution Table 2 Complete PI2126 EVAL1 Evaluation Board Bill of Material Picor Corporation e picorpower com Value Not Installed 100uF Not Installed LTST C191CKT 1528 PI2126 EVAL1 User Guide PI2126 PI2126 el ei e viole is 20k 44 LTST C191CKT FTI wi siwi isih LTST C191CKT FT2 Description MLCC X7R 1uF 50V Electrolytic 100uF 63V Panasonic _E F MLCC 1uF 25V LED Red Turret Test point Turret Test point Rev 1 0 0603 LED TURRET 1528 TURRET 1502 Lite On Keystone Electronics Keystone Electronics Page 3 of 8 c c Bias resistor optional can be used to replace the internal resistor Remove R3 and R4 if Not Installed f i 4 the this option is desired Controller bias input through internal resistor LED current limit resistor selected to operate at 3 3V and 5 0V logic voltage Replace R5 20KQ and R6 with the proper resistor value for different logic voltage PI2126 01 LGIZ
11. the on state it will not turn off unless a reverse current greater than 1 1A is sensed in the MOSFET When both power supplies are enabled and both PI2126 MOSFETs are in Rpsron if one of the sources Power supplies removed or disabled both PI2126 stay on unless the disabled power supply sources current greater than 1 1A when turned off 3 Internal MOSFET Rps on Measurement 3 1 The internal MOSFET Rps on can be measured with a voltmeter between the S1 and D1 Kelvin connection for U1 and between the S2 and D2 Picor Corporation e picorpower com PI2126 EVAL1 User Guide Rev 1 0 Kelvin connection for U2 The potential between S1 and D1 is the voltage drop across the internal MOSFET and Vs Vp1 R DS on lin Where Vs1 Vp1 Voltage drop across the internal MOSFET Tin Input current Note The Rosion Value is temperature dependent and the junction temperature increases directly proportional to power dissipation 4 Input short circuit test PI2126 has a very fast response 80ns to a reverse current Input short fault condition Measuring a short period event requires attention to the test set up Before proceeding consider the following 4 1 To emulate a real application the BUS supplies for this test should have a solid output source such as a DC DC converter that supplies high current and can be connected very close to the evaluation board to reduce stray parasitic inductance Or use the prospec
12. tive supply sources of the end application where the PI2126 will be used Typical bench power supplies have slow response to output load change In this test when the power supply output is shorted and then released the bench power supply may produce high output voltage with high current capability that may damage the device under test 4 2 Do not install Input capacitors C1 and or C2 in this test 4 3 Output capacitor C5 should be installed 4 4 Place the scope probes very close to the PI2126 S and D pins to measure Vin and Vout and make sure that the scope ground leads are very short You may use a close by ground pad for the scope probe return such as C1 C2 C3 and C4 return pads 4 5 Apply a short at one of the inputs Vin1 or Vin2 when both SiP s U1 and U2 are on PS1 and PS2 are enabled The short can be applied electronically using a MOSFET connected between Vin and Gnd or simply by connecting Vin to Gnd Then measure the response time between when the short is applied and the PI2126 internal MOSFET is disconnected or turned off An example for the PI2126 response time to an input short circuit is shown in Figure 4 Page 5 of 8 ek S sakanan a anga anganan aan aa aa aanjakand Applied a short re DUT PI2126 EVALI Vin2 12V Output Load 12A ee O AA Applied a MOSFET Starts 77 6ns i A89 6ns es wees Tj Test Yout SV div eee Both input sources are turned
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