Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 1 of 11
Introduction
The PI2001-EVAL1 allows the user to test the basic principle
and operational characteristics of an Active ORing function in
a redundant power architecture, while also experiencing the
benefits and value of the PI2001 solution versus conventional
Active ORing solutions. The PI2001-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 contains a PI2001
controller and an N-channel power MOSFET. The MOSFET
foot print can take an SO-8 or Power SO-8 MOSFET package.
Each channel is capable of up to 20 A, for high current Active
ORing, above 20 A, the two channels provided on the
evaluation board can be paralleled in a master / slave
configuration and OR’d with a second evaluation board.
The PI2001-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 ≤ 7 Vbus applications requiring up to 20 A.
This evaluation board is intended as an easy and simple way
to test the electrical and thermal performance of the PI2001
Active ORing controller.
Both dynamic and steady state testing of the PI2001 can be
completed on the PI2001-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 PI2001 can be
found in the PI2001 product data sheet.
PI2001-EVAL1
Cool-ORing™ Series
PI2001-EVAL1 Active ORing
Evaluation Board User Guide
®
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1
PI2001 Product Description . . . . . . . . . . . . . . . . . . Page 2
Evaluation Board Terminal Description . . . . . . . . Page 2
Evaluation Board Schematic . . . . . . . . . . . . . . . . . Page 3
Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
Evaluation Board Configuration . . . . . . . . . . . . . . Page 4
Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
PCB Layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
Evaluation Board Mechanical Drawing . . . . . . . Page 11
PI2001-EVAL1 Evaluation Board
featuring the Cool-ORing PI2001
Universal Active ORing controller.
Cool-ORing™ Series
The PI2001-EVAL1 Evaluation Board is intended to acquaint the
user with the benefits and features of the Cool-ORing
TM
PI2001
Universal Active ORing controller. It is not designed to be
installed in end-use equipment.
Please read this document before setting up the PI2001-EVAL1
Evaluation Board and refer to the PI2001 product data sheet
for device specifications, functional description and
characteristics.
During operation, the 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.
Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 2 of 11
The Cool-ORing PI2001 with an external industry standard
N-channel MOSFET provides a complete Active ORing
solution designed for use in redundant power system
architectures. The PI2001 controller with N-channel MOSFET
enables extremely low power loss with fast dynamic response
to fault conditions, critical for high availability systems. A
master /slave feature allows the paralleling of PI2001
solutions for high current Active ORing requirements. The
PI2001 can also drive multiple paralleled MOSFETs.
The PI2001 controller with a low Rds(on) N-channel MOSFET
provides very high efficiency and low power loss during
steady state operation. The PI2001 controller provides an
active low fault flag output to the system during excessive
forward current, light load, reverse current, over-voltage,
under-voltage, and over-temperature fault conditions.
A temperature sensing function indicates a fault if the
maximum junction temperature exceeds 160°C. The undervoltage and over-voltage thresholds are programmable via
an external resistor divider.
Figure 1 shows a photo of the PI2001-EVAL1 evaluation
board, with two PI2001 controllers and two N-channel
MOSFETs 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 PI2001 universal Active ORing controller.
Figure 1 – PI2001-EVAL1 Evaluation Board (1.8" x 1.8")
Terminals Rating
Vin1, Vin2 8V / 24 A
Vaux1, Vaux2, (R2 = R4 = 10 Ω) -0.3 V to 17.3 V / 40 mA
SL1, SL2 -0.3 V to 8.0 V / 10 mA
FT1, FT2 -0.3 V to 17.3 V / 10 mA
Terminal Description
Vin1 Power Source Input #1 or bus input designed to accommodate up to 20 A continuous current.
Vaux1 Auxiliary Input Voltage #1 to supply PI2001 VC power. Vaux1 should be equal to Vin1 plus 5 V or higher.
See details in Auxiliary Power Supply (Vaux) section of the PI2001 data sheet.
Rtn1 Vaux1 Return Connection: Connected to Ground plane
Gnd Vin & Vout Return Connection: Three 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 Gnd connection.
SL1 PI2001 (U1) Slave Input-Output Pin: For monitoring U1 slave pin. When U1 is configured as the Master, this pin functions
as an output that drives slaved PI2001 devices. When U1 is configured in Slave mode, SL1 serves as an input.
SL2 PI2001 (U2) Slave Input-Output Pin: For monitoring U2 slave pin. When U2 is configured as the Master, this pin functions
as an output that drives slaved PI2001 devices. When U2 is configured in Slave mode, SL2 serves as an input.
Vin2 Power Source Input #2 or bus input designed to accommodate up to 20 A continuous current.
Vaux2 Auxiliary Input Voltage #2 to supply PI2001 VC power. Vaux2 should be equal to Vin2 plus 5 V or higher.
See details in Auxiliary Power Supply (Vaux) section of the PI2001 data sheet.
Rtn2 Vaux2 Return Connection: Connected to Ground plane
FT1 PI2001 (U1) Fault Pin: Monitors U1 fault conditions
FT2 PI2001 (U2) Fault Pin: Monitors U2 fault conditions
Vout Output: Q1 and Q2 MOSFET Drain pins connection, connect to the load high side.
Table 1 – PI2001-EVAL1 Evaluation Board terminals description
Cool-ORingTMPI2001 Product Description
Jumper Description
J1, J3 BK Jumpers: Connect jumper across M for master mode and across S for slave mode. Remove jumper to adjust reverse fault
blanking time using Rbk. Rbk is R7 for U1 and R14 for U2 shown in the schematic, Figure 2.
J2 Slave Jumper: Remove the jumper unless one of the PI2001 is configured in slave mode.
Table 2 – PI2001-EVAL1 Evaluation Board jumpers description
Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 3 of 11
Vin1
Figure 2 – PI2001-EVAL1 Evaluation Board 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 C3 22 µF
Capacitor, MLCC X7R,
1210
22 µF, 25 V
3 4 C4, C5, C6, C7 Not installed 1206
4 2 D1, D2 LED, Super Red THIN 0603 Lite-On, Inc.,
58
FT1, FT2, Rtn1, Rtn2,
Turret Test point TURRET-1528
Keystone
SL1, SL2, Vaux1, Vaux2 Electronics
67
Gnd1, Gnd2, Gnd3, Gnd4,
Turret Test point TURRET-1502
Keystone
Vin1, Vin2, Vout1, Vout2 Electronics
7 2 J1, J3 Header Pins 0.1" pitch 2 x 3mm
8 1 J2 Header Pins 0.1" pitch 2 x 2mm
9 2 Q1, Q2
FDS8812NZ
SO-8 Fairchild
30 V, 20 A, N-MOSFET
10 2 R1, R8 8.45 KΩ Resistor,8.45 KΩ,1% 0603
11 2 R2, R9 13.3 KΩ Resistor,13.3 KΩ,1% 0603
12 2 R3, R10 10 Ω Resistor,10 Ω,5% 0603
13 2 R4, R11 4.99 KΩ Resistor, 4.99 KΩ,5% 0603
14 4 R5, R6, R12, R13 2.00 KΩ Resistor, 2.00 KΩ,1% 0603
15 2 R7, R14 Not Installed 0603
16 2 U1, U2 PI2001 Picor Universal Active ORing Controller 3mmx3mm; 10-TDFN PICOR
Table 3 – PI2001-EVAL1 Evaluation Board bill of materials
Gnd1
GND
Vaux1 Vaux1
Rtrn1
SL1
SL2
Vin2
Gnd2
Vaux2 Vaux2
Rtrn2
R1
8.45K 1%
R5
2.00 K 1%
R8
8.45 K 1%
R12
2.00 K1%
VIN1
R2
13.3 K 1%
R6
2.00 K 1%
VIN2
R9
13.3 K 1%
R13
2.00 K1%
SL1
J2
SL2
C4
Not
Installed
9
10
4
C5
Not
Installed
9
10
4
Q1
FDS8812NZ
3
2
1
7
P
S
UV
OV
SL
FDS8812NZ
3
2
1
7
P
S
UV
OV
SL
8
7
6
5
4
U1
PI2001
8
2
N
TE
S
VC
BK
8
7
6
5
8
SN
VC
BK
3
6
FT
5
Not Installed
U2
PI2001
3
6
FT
5
Not Installed
GA
D
N
G
1
Q2
4
2
TE
A
G
D
N
G
1
R14
FT1
R7
FT2
C6
Not Installed
FT1
BK1
C7
Not Installed
FT2
BK2
VC1
R4
4.99K
VC2
R11
4.99K
VOUT
Vaux1
R3
10.0
D1
S
J1
M
D2
S
J3
M
Vaux2
C1
1uF
R10
10.0
C2
1uF
C3
22uF
Vout1
Vout2
Gnd3
Gnd4
Initial Test Set Up
To test the PI2001-EVAL1 evaluation board it is necessary to
configure the jumpers (J1, J2 and J3) first based on the
required board configuration.
Failure to configure the jumpers prior to the testing may
result in improper circuit behavior
Baseline Test Procedure (Refer to Figure 3)
1.0 Recommended Equipment
1.1 Two DC power supplies - 0-10 V; 25 A.
1.2 DC power supply 12 V; 100 mA.
1.3 DC electronic load - 50 A minimum.
1.4 Digital Multimeter
1.5 Oscilloscope.
1.6 Appropriately sized interconnect cables.
1.7 Safety glasses.
1.8 PI2001 Product Data sheet.
Figure 3 – Layout configuration for a typical redundant power application, using PI2001 with both solutions
configured in Master Mode.
Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 4 of 11
Reference Designator Value Functional Description
C1, C2 1 µF VC Bypass Capacitor
C3 22 µF Output (Load) Capacitor
C4, C5, C6, C7 Not installed Snubber to reduce voltage ringing when the device turns off
D1, D2 LED To indicate a fault exist when it is on
J1, J3 Jumper To select between Master and Slave Modes
J2 Jumper Connection between SL1 and SL2
Q1, Q2 N-MOSFET ORing Main Switch
R1, R8 8.45 KΩ UV Voltage Divider Resistor ( R2UV in Figure 4)
R2, R9 13.3 KΩ OV Voltage Divider Resistor ( R2OV in Figure 4)
R3, R10 10 Ω VC Bias resistor
R4, R11 4.99 KΩ LED Current Limiter
R5, R6 2.00 KΩ UV Voltage Divider Resistor ( R1UV in Figure 4)
R7, R14 Not Installed BK Delay Timer Programmable Resistor
U1, U2 PI2001 Universal Active ORing Controller
Table 4 – Component functional description