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
Before initial power-up follow these steps to configure the
evaluation board for specific end application requirements:
2.0 Undervoltage (UV) and Overvoltage (OV) resistors set up:
2.1 UV and OV programmable resistors are configured
for a 3.3 V Vin (BUS voltage) application in a
two-resistor voltage divider configuration as shown in
Figure 4. UV is set to 2.6 V and OV is set for 3.8 V,
R1OV and R1UV are 2.00KΩ 1%. If PI2121-EVAL1 is
required to be used in a different Vin voltage . .
application please follow the following steps to
change the resistor values.
2.1.1 It is important to consider the maximum current
that will flow in the resistor divider and
maximum error due to UV and OV input .
current.
R1UV =
V(UV
TH)
I
RUV
2.1.2 Set R1UV and R1OV value based on system
allowable minimum current and 1% error;
I
RUV ≥ 100 µA
R2UV =R1UV
(
V(UV)
–1
)
V(UVTH)
Where:
V(UV
TH) : UV threshold voltage
V(UV) : UV voltage set (0.5 V typ)
I
RUV: R1UV current
R2OV =R1OV
(
V(OV)
–1
)
V(OVTH)
Where:
V(OV
TH) : OV threshold voltage
V(OV) : OV voltage set (0.5 V typ)
I
ROV: R1OV current
Figure 4 – UV & OV two-resistor divider configuration
Ref. Desg. U1 U2
R1UV R5 R12
R2UV R1 R8
R1OV R6 R13
R2OV R2 R9
Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 5 of 11
2.1.3 Example for 2.0 V Vin (BUS voltage), to set UV and OV for ±10% Vin set UV at 1.8 V and OV at 2.2 V.
R2UV= R1UV
(
V(UV)
–1
)
= 2.00 KΩ
*
(
1.8 V
–1
)
= 5.20 KΩ (or 5.23 KΩ % standard value)
V(UVTH) 0.5 V
R2OV= R1OV
(
V(OV)
–1
)
= 2.00 KΩ
*
(
2.2 V
–1
)
= 6.80 KΩ (or 6.81 KΩ % standard value)
V(OVTH) 0.5 V
Vin
R2
UV
V_Logic
UV
R1UV
R2
OV
R1OV
PI2001
OV
FT
GND
FT
Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 6 of 11
3.0 Blanking timer setup:
3.1 The blanking timer provides noise filtering for
typical switching power conversion that might
cause premature reverse current detection by
masking the reverse fault condition. The shortest
blanking time is 50 ns when the BK pin is
connected to ground. Connecting an external
resistor (R
BK, reference designators R7 for U1 and
R14 for U2) between the BK pin and ground will
increase the blanking time as shown in Figure 5.
Where: R
BK ≤ 200 KΩ
Note: When BK is connected to VC for slave mode .
operation,then the blanking time will be 270 ns typically.
4.0 Auxiliary Power Supply (Vaux):
4.1 The PI2001 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.
4.2 Connect independent power source to Vaux inputs of
PI2001-EVAL1 Evaluation Board to supply power to
the VC input. The Vaux voltage should be 5V higher
than Vin (redundant power source output voltage) to
fully enhance the MOSFET. If the MOSFET is replaced
with different MOSFET, make sure that Vaux= Vin +
0.5 V + required voltage to be enhance the MOSFET.
4.3 10 Ω bias resistors (Rbias, reference designators R3
and R10) are installed on the PI2001-EVAL1 between
each Vaux input and VC pin of one of the PI2001
controller.
4.4 If Vaux is higher than the Clamp voltage, 15.5 V
typical, the Rbias value has to be changed using the
following equations:
4.4.1 Select the value of Rbias using the following
equation:
Rbias =
Vaux
min –VCclampMAX
ICmax
4.4.2 Calculate Rbias maximum power dissipation:
PdRbias =
(Vaux
max –VCclampMIN)
2
Rbias
Where:
Vaux
min: Vaux minimum voltage
Vaux
max: Vaux maximum voltage
VC
ClampMAX: Maximum controller
clamp voltage, 16.0 V
VC
ClampMIN: Minimum controller
clamp voltage, 14.0 V
IC
max: Controller maximum bias current,
use 4.2 mA
4.4.3 For example, if the minimum Vaux = 22 V
and the maximum Vaux = 28 V
Rbias =
Vaux
min –VCclampMAX
=
22 V–16 V
= 1.429 KΩ
ICmax 4.2 mA
,use 1.43 KΩ 1% resistor
PdRbias = (Vauxmax –VCclampMIN)2= (28 V–14.0 V)2=137 mW
Rbias 1.43 KΩ
Note: Minimize the resistor value for low Vaux voltage
levels to avoid a voltage drop that may reduce the VC
voltage lower than required to drive the gate of the
internal MOSFET.
Figure 5 –BK Resistor selection versus Blanking Time
Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 7 of 11
5.0 Hook Up of the Evaluation Board
5.1 OV and UV resistors values are configured for a 3.3 V
input voltage. If you are using the evaluation board in
a different input voltage level you have to adjust the
resistor values by replacing R1, R2, R8 and R9, or
remove R2, R5, R9 and R12 to disable UV and OV.
Please refer to the UV/OV section for details to set R1,
R2, R8 and R9 proper values.
5.2 Verify that the jumpers J1 and J3 are installed for
master mode [across M] and no Jumper on J2.
5.3 Connect the positive terminal of PS1 power supply
to Vin1. Connect the ground terminal of PS1 to its
local Gnd. Set the power supply to 3.3 V.
Keep PS1 output disabled (OFF).
5.4 Connect the positive terminal of PS2 power supply
to Vin2. Connect the ground terminal of PS2 to its
local Gnd. Set the power supply to 3.3 V. Keep PS2
output disabled (OFF).
5.5 Connect the positive terminal of PS3 power supply
to Vaux1 and Vaux2. Connect the ground terminal
of this power supply to Rtn1 and Rtn2. Set the
power supply to 12 V. Keep PS3 output disabled (OFF).
5.6 Connect the electronic load to the output between
Vout and Gnd. Set the load current to 10 A.
5.7 Enable (turn ON) PS1 power supply output.
5.8 Turn on the electronic load.
5.9 Verify that the electronic load input voltage
reading is one diode voltage drop below 3.3 V.
5.10 Enable (turn ON) PS3 power supply output.
5.11 Verify that the electronic load voltage reading
increases to a few millivolts below 3.3 V. This verifies
that the MOSFET is in conduction mode.
5.12 D1 should be off. This verifies that there is no
fault condition.
5.13 Reduce PS1 output voltage to 2 V,
5.14 D1 should turn on, this verifies that the circuit is in
an under-voltage fault condition.
5.15 Increase PS1 output to 3.3 V, D1 should turn off, then
increase PS1 output to 4 V, D1 should turn on
indicating an over-voltage fault condition
5.16 Verify that Vin2 is at 0V. This verifies that the
PI2001 (U2) FET (Q2) is off.
5.17 D2 should be on. This is due to a reverse voltage
fault condition caused by the bus voltage being
high with respect to the input voltage (Vin2).
5.18 Enable (turn ON) PS2 output.
5.19 Verify that both PS1 and PS2 are sharing load
current evenly by looking at the supply current.
5.20 Disable (turn OFF) PS1, PS2 and PS3 outputs.
5.21 Enable (turn ON) PS2 output then Enable PS3 output.
5.22 Verify that the electronic load voltage reading is
few millivolts below 3.3 V. This verifies that the PI2001
(U2) MOSFET (Q2) is in conduction mode.
5.23 D2 should be off. This verifies that there is no
fault condition.
5.24 Reduce PS2 output voltage to 2 V,
5.25 D2 should turn on, this verifies that the circuit is in
an under-voltage fault condition.
5.26 Increase PS2 output to 3.3 V, D2 should turn off, then
increase PS2 output to 4 V, D2 should turn on
indicating an over voltage fault condition.
5.27 Verify that Vin1 is at 0V. This verifies that the
PI2001 (U1) FET (Q1) is off.
5.28 D1 should be on. This is due to a reverse voltage
fault condition caused by the bus voltage being
high with respect to the input voltage (Vin1).
6.0 Slave Mode: Slave Mode can be demonstrated in two
setups; either by using one PI2001-EVAL1 evaluation board as
a single ORing function with both PI2001 effectively in
parallel or two PI2001-EVAL1 evaluation boards to
demonstrate a true redundant 40A system. The following test
steps use a single PI2001-EVAL1 in a slave mode application.
Note: In this experiment U1 is configured in master mode and
U2 is configured in slave mode.
6.1 BK pin (J1) of the master device will be connected to
ground [across M] while the slaved device BK pin (J3)
is connected to VCC [across S]. Place a jumper across J2
to connect slave pins together.
6.2 Connect the positive terminal of PS1 power supply
to Vin1. Connect the ground terminal of this power
supply to Gnd. Set the power supply to 3.3 V. Keep
PS1 output disabled (OFF).
6.3 Connect the positive terminal of PS2 power supply
to Vin2. Connect the ground terminal of this power
supply to Gnd. Set the power supply to 3.3 V. Keep
PS2 output disabled (OFF).
6.4 Connect the positive terminal of PS3 power supply
to Vaux1 and Vaux2. Connect the ground terminal
of this power supply to Rtn1 and Rtn2. Set the
power supply to 12 V. Keep PS3 output disabled (OFF).
6.5 Connect the electronic load between Vout and
Gnd. Set the load current to 10 A.
6.6 Enable (Turn ON) PS2, and PS3 outputs, and keep
PS1 output disabled (OFF).
6.7 Turn on the electronic load.
6.8 Verify that electronic load voltage drops to a diode
drop below PS2. This verifies that the Q2 is off due to
the Master (U1) not being on.
Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 8 of 11
6.9 Enable (turn on) PS1 output:
6.10 Verify that the electronic load input voltage reading is
a few millivolts below 3.3 V and PS1 and PS2 are
sharing the load current evenly. This verifies that both
MOSFET's, Q1 and Q2, are in conduction mode.
7.0 Input short circuit test
7.1 To emulate a real application, the BUS supplies for this
test should have a solid output source such as 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
prospective supply sources of the end application
where the PI2001 will be used.
7.2 Stray parasitic inductance in the circuit can contribute
to significant voltage transient conditions, particularly
when the MOSFET is turned-off after a reverse current
fault has been detected. When a short is applied at
the output of the input power sources and the .
evaluation board input (Vin), a large reverse current is
sourced from the evaluation board output through
the ORing MOSFET. The reverse current in the MOSFET
may reach over 60 A in some conditions before the
MOSFET is turned off. Such high current conditions
will store high energy even in a small parasitic
element, and can be represented as ½ Li2. A 1 nH
parasitic inductance with 60 A reverse current will
generate 1.8 µJ. When the MOSFET is turned off, the
stored energy will be released and will produce a high
negative voltage at the MOSFET source and high
positive voltage at the MOSFET drain. This event will
create a high voltage difference across the drain and
source of the MOSFET.
7.3 Apply a short at one of the inputs (Vin1 or Vin2) when
the evaluation board is configured with both
controllers (U1 and U2) in master mode. 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 MOSFET is disconnected
(or turned off). An example for PI2001 response time
to an input short circuit is shown in Figure 6.
Figure 6 – Plot of PI2001 response time to reverse current detection
Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 9 of 11
Figure 7a – PI2001-EVAL1 layout top layer. Scale 2.0:1 Figure 7b – PI2001-EVAL1 layout mid layer 2. Scale 2.0:1
Figure 7c – PI2001-EVAL1 layout mid layer 1. Scale 2.0:1 Figure 7d – PI2001-EVAL1 layout Bottom layer. Scale 2.0:1
Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 10 of 11
Mechancial Drawing
1.800
1.600
1.450
1.350
1.200
0.950
0.850
0.600
0.450
0.350
0.200
0.000
Vin1
Gnd
Vin2
Gnd
Vaux1
Rtrn1
SL1
SL2
Vaux2
Rtrn2
Q1
PI2001-EVAL1
rB 9/2007
C4
R3
C1
IC1
D1
R7
R4
J1
J2
C6
1.500
R1
R2
R5
R6
FT1
VoutGnd
1.100
C3
Q2
0.700
C5
R10
C2
IC2
D2
R14
R11
J3
C7
R8
R12
R9
R13
FT2
Cool-ORing
0.300
0.000
0.000
0.150
0.400
0.500
1.250
1.650
1.800
Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 7/08
Vicor’s comprehensive line of power solutions includes high-density AC-DC & DC-DC
modules and accessory components, fully configurable AC-DC & 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. No license is 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.
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