Picor PI2002-EVAL1 User Manual Download

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Picor Corporation • www.picorpower.com

PI2002-EVAL1 User Guide Rev 1.0

Page 10 of 11

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Vout

Gnd

Cool-ORing

rA 4/2007

PI2002-EVAL1

Vaux2

FT1

FT2

IC1

IC2

Vin1

Vin2

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R11

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SL2

Vaux1

Mechancial Drawing

Figure 8a

– PI2002-EVAL1 layout top layer. Scale 2.0:1

Figure 8b

– PI2002-EVAL1 layout mid layer 2. Scale 2.0:1

Summary of Contents for PI2002-EVAL1

Page 1: ...an 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 PI2002 can be found in the PI2002 product data sheet PI2002 EVAL1 Cool ORing Series PI2002 EVAL1 Active ORing With Load Disconnect Evaluation Boa...

Page 2: ...dentical Active ORing circuits with options and features that enable the user to fully explore the capabilities of the PI2002 universal Active ORing with Load Disconnect controller Figure 1 PI2002 EVAL1 Evaluation Board 1 8 x 1 8 Terminals Rating Vin1 Vin2 8 V 20 A Vaux1 Vaux2 R11 R19 10 Ω 0 3 V to 17 3 V 40 mA FT1 FT2 0 3 V to 17 3 V 10 mA Terminal Description Vin1 Power Source Input 1 or bus inp...

Page 3: ...ard schematic Item QTY Reference Designator Value Description Footprint Manufacturer 1 2 C1 C2 1 µF Capacitor MLCC X5R 0603 1 µF 16 V 2 1 C9 22 µF Capacitor MLCC X7R 1210 22 µF 25 V 3 4 C3 C4 C7 C8 Not installed 1206 4 2 C2 C3 18 nF Capacitor MLCC X5R 0603 18 nF 25 V 5 2 D1 D2 LED Super Red THIN 0603 Lite On Inc 6 6 FT1 FT2 Rtn1 Rtn2 Turret Test point TURRET 1528 Keystone Vaux1 Vaux2 Electronics 7...

Page 4: ...2002 EVAL1 User Guide Rev 1 0 Page 4 of 11 Reference Designator Value Functional Description C1 C5 1 µF VC Bypass Capacitor C9 22 µF Output Load Capacitor C3 C4 C7 C8 Not installed Snubber to reduce voltage ringing when the device turns off C2 C6 18 nF OCT off timer Capacitor D1 D2 LED To indicate a fault exist when it is on J5 J6 Jumper SCD to select for Gate high charge current or Gate low charg...

Page 5: ...e to UV and OV input current R1UV V UVTH IRUV 2 1 2 Set R1UV and R1OV value based on system allowable minimum current and 1 error IRUV 100 µA R2UV R1UV V UV 1 V UVTH Where V UVTH UV threshold voltage V UV UV voltage set 0 5 V typ IRUV R1UV current R2OV R1OV V OV 1 V OVTH Where V OVTH OV threshold voltage V OV OV voltage set 0 5 V typ IROV R1OV current PI2002 UV OV FT FT V_Logic GND R2UV R1UV R2OV ...

Page 6: ...ower Supply Vaux 5 1 The PI2002 Controller has a separate input VC that provides power to the control circuitry and the gate driver An internal voltage regulator VC clamps the VC voltage to 15 5 V typically 5 2 Connect independent power source to Vaux inputs of PI2002 EVAL1 Evaluation Board to supply power to the VC input The Vaux voltage should be 5V higher than Vin redundant power source output ...

Page 7: ... turned off 6 15 Increase PS1 output to 3 3 V D1 should turn off and output voltage is 3 3V Then increase PS1 output to 4 V D1 should turn on indicating an over voltage fault condition and output voltage should go to 0 V indicating that the MOSFETs are turned off 6 16 Verify that Vin2 is at 0 V This verifies that the PI2002 U2 MOSFETs are off 6 17 D2 should be on This is due to a reverse voltage f...

Page 8: ...Gnd or simply by connecting Vout to Gnd Monitor the voltage across the MOSFETs V D1 V D2 with differential probe if available Then measure the response time between when V D1 V D2 reaches the forward overcurrent threshold 114 mV and when the MOSFETs are disconnected or turned off An example for PI2002 response time to an output short circuit is shown in Figure 6 Figure 6 Plot of PI2002 response ti...

Page 9: ...luation board output through the ORing MOSFETs The reverse current in the MOSFET may reach over 60 A in some conditions before the MOSFETs are turned off Such high current conditions will store high energy even in a small parasitic element and can be represented as Li2 A 1 nH parasitic inductance with 60 A reverse current will generate 1 8 µJ When the MOSFETs are turned off the stored energy will ...

Page 10: ...0 1 000 1 400 1 600 1 100 0 300 0 000 0 150 1 450 1 600 1 000 Vout Gnd Gnd Gnd Cool ORing rA 4 2007 PI2002 EVAL1 Vaux2 C1 C2 D1 D2 FT1 FT2 IC1 IC2 Vin1 Vin2 J1 J2 J3 Q1 Q4 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 SL1 SL2 Vaux1 Q2 Q3 Mechancial Drawing Figure 8a PI2002 EVAL1 layout top layer Scale 2 0 1 Figure 8b PI2002 EVAL1 layout mid layer 2 Scale 2 0 1 ...

Page 11: ...s granted by implication or otherwise under any patent or patent rights of Vicor 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...

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