PDF

USER GUIDE | UG:301
PI31xx-xx-EVAL1 Cool-Power® ZVS Isolated
DC-DC Converter Evaluation Board
Chris Swartz
Principal Applications Engineer
May 2013
ContentsPage
Introduction1
Product Description
2
Board Connections
2
Thermal Considerations
3
Max I/O Ratings 5
Schematic
BOMs 6
Test Setup
11
PCB Artwork
12
Mechanical Outline
14
Ordering Information
14
Introduction
The PI31xx-xx-EVAL1 evaluation board allows the user to test the basic operating
principles of the PI31xx series of high density DC-DC power converters and experience
the performance and value of this solution compared to alternate conventional
solutions. Each evaluation board is populated with the components that could be used
in a final design. It is not designed or intended to be used in end product applications.
Please read this document prior to the connection of test equipment and refer to the
product datasheet for device specifications, descriptions and characteristics. Remember
to follow good lab safety practices and use safety glasses at all times.
The PI31xx-xx-EVAL1 is configured to support one single input and one single output.
Each board offers pin strap options for trimming the output voltage up and down,
turning the converter on and off and adding EMI system “Y” capacitors. Additional
parts are included to compensate for line impedance associated with long leads from
the bench power supply to the converter. Additional component footprints are made
available to allow the user to test different design configurations that may be required
to meet their end needs. Kelvin type test points are included to allow for easy and
convenient connections of testing instruments for evaluation of efficiency, line/load
regulation and transient response. A low impedance oscilloscope connection using a
Johnson jack is included for ripple measurement and evaluation of the output voltage
during transient events. Each demo board is equipped with a heatsink to allow high
power operation with a small amount of air flow and to allow operation of the board
over various temperature extremes.
Figure 1.
PI31xx-xx-EVAL1
Evaluation Board
UG:301
vicorpower.com Applications Engineering: 800 927.9474
Page 1
Cool-Power® PI31xx Series Product Description
The PI31xx operates over a wide range input, delivering 50 W or 60 W output power
depending on the individual model number. The PI31xx Series is available in a space
saving surface mountable 0.87” x 0.65” x 0.265” Power –System –in – a – Package (PSiP),
achieving ~50% space reduction versus alternative solutions.
The switching frequency of 900kHz allows for small input and output filter components
which further reduces the total size and cost of the overall system solution. The output
voltage is sensed and fed back to the internal controller using a proprietary isolated
magnetic feedback scheme which allows for high bandwidth and good common mode
noise immunity.
The PI31xx Series requires no external feedback compensation and offers a total
solution with a minimum number of external components. A rich feature set is
offered, including + 10%, -20% output voltage trim capability (depending on the model
number), remote enable, over-voltage protection, adjustable soft-start, over-current
protection with auto-restart to protect against both short circuit and overload and over
and under input voltage lockout. A unique temperature monitor and protection circuit
is included that provides an analog voltage proportional to the internal die temperature,
as well as over temperature shutdown, restart and over temperature fault alarm signal.
Board Connections
1. Connect Test Equipment
a.
Connect the input DC power supply to the target board as shown in Figure 6. The negative terminal should be wired to –IN and the positive terminal should connect to the positive terminal of the DMM wired as a DC Ammeter. Be sure
that the proper sized wires are used to allow minimum voltage drop for a
maximum input current of up to 4 A. Use ring lugs mated to the included
fasteners on the evaluation board. If your input power supply has remote sense
capability, it can be wired to the INN and INP test points if desired. Connect the positive terminal of the DMM to the +IN lug on the evaluation board.
b. Connect the primary side DMM (for measuring the input voltage) to INN and INP respectively.
c.
Connect the oscilloscope as shown in Figure 6 if you are planning to measure
both primary and secondary signals at the same time. If you do not have an isolated differential amplifier, it is important to note that simultaneous
measurement of both primary and secondary referenced signals using an
oscilloscope with a grounded chassis is not recommended, as it will short circuit
the primary to secondary isolation barrier. Floating the oscilloscope is also not
recommended due to the large capacitance introduced by this long standing practice. The best practice is to use an isolated differential amplifier or use an
oscilloscope with isolated channels. That is, the input returns are isolated from each other and earth ground.
d.
e.
Connect the output DC DMM to the test points OUTN and OUTP. These test
points are done in a Kelvin type manner so that they have no high current
flowing in them.
Connect the DC Load to the output lugs OUT+ and OUT-. It is critical for this
connection to be low inductance.
UG:301
vicorpower.com Applications Engineering: 800 927.9474
Page 2
2. Default Pin Strap Configuration
a. Ensure the pin straps are in the following default locations before proceeding:
nENABLE = Not Used (enabled)
nTRIM_UP = Not Used
nTRIM_DN = Not Used
nOPT1 = Not Used
nOPT2 = Not Used
3. Pin Strap Functions
a. ENABLE – adding a strap on this pin will cause the converter to shut down.
b. TRIM_UP – Adding a strap in this location will adjust the output voltage
up by 10%.
c. TRIM_DN – Adding a strap in this location will adjust the output voltage down by 10%. Only one strap can be connected at a time. If both trim straps are out, the output voltage should be set to the model’s nominal output.
4. Trimming And Soft Start
a. For those customers who wish to trim to another voltage by changing the preset trim resistors to another value, the trim equation shown in Figure 2 can be used:
Figure 2.
PI31xx Trim Equation
Rlow = (–Vdesired ) •
Rhigh = (–RSS) •
RINT
(–Voutnom) + Vdesired
(–Voutnom) • VERO + Vdesired • Vref
Vref [(–Voutnom) + Vdesired ]
Where: R1 = Rlow R3 = Rhigh VERO = 4.9 and Vref can be found in the appropriate
model datasheet.
Figure 3 shows an equation for soft start configuration where C7 = CREF
Figure 3.
PI31xx Soft Start Equation
CREF =
Tssdesired – 230 • 10−6
23000
Figure 4.
PI31xx Trimming Equivalent
Circuit
ENABLE
PI31xx
Rhigh
10k
RSS
VERO
TRIM/SS
•
Vref
Rlow
•
SGND
•
UG:301
vicorpower.com Applications Engineering: 800 927.9474
Page 3
Thermal Considerations
The PI31xx-xx-EVAL1 is supplied with optional heat sinks. At present, Picor offers four
different heat sink options to accommodate the customers space and cooling needs.
Heatsinks are available in two sizes, one with 6.3mm fins and the other with 11mm fins.
Each of those heatsinks can be ordered with a specific air flow direction in mind, both
cross flow and longitudinal are supported. Please refer to the product website
www.vicorpower.com for more information.
Table 1.
PI31xx-xx-EVAL1
Input-Output Pin Description
Pin
IN+
Input/Lug
Primary side positive input voltage terminal.
IN-
Input/Lug
Primary side negative input voltage terminal.
OUT+
Output/Lug
Isolated secondary DC output voltage positive terminal.
OUT-
Output/Lug
Isolated secondary DC output voltage negative terminal.
TM
Test/Pin
Temperature measurement output pin with respect to SGND. 3V=300°K 10mV/°K
SGND
Test/Pin
Signal ground, primary side referenced.
TypeDescription
Name
TRIM/SSTest/Pin
Monitor pin for the soft start voltage and trim voltage reference with respect to SGND.
ENABLE
Allows for monitoring of the ENABLE signal with respect to SGND.
INNTest/Pin
Kelvin sense connection for input supply (-) and input voltage measurement test point.
INPTest/Pin
Kelvin sense connection for input supply (+) and input voltage measurement test point.
YNOutput/Pad
Optional test pad for connection of optional “YN” capacitor to external system ground.
YPOutput/Pad
Optional test pad for connection of optional “YP” capacitor to external system ground.
OUTPTest/Pin
Kelvin sense connection for output voltage (+) and output voltage measurement test point.
OUTNTest/Pin
Kelvin sense connection for output voltage (-) and output voltage measurement test point.
PCB test jack for low noise measurement of the output voltage.
Table 2.
PI31xx-xx-EVAL1
Evaluation Board
Pin Strap and Jumper
Description
Test/Pin
OUT
Test/PIn
Name
Description
ENABLE
If strap is installed, unit is turned off. If strap is removed, unit will be enabled.
TRIM_UP
If strap is installed, PI3105 trims output voltage up 10%
TRIM_DN
If strap is installed, PI3105 trims output voltage down 10%
OPT1
Allows optional connection of heat sink assembly to secondary return (-IN)
OPT2
Allows optional connection of heat sink assembly to secondary return (-OUT)
UG:301
vicorpower.com Applications Engineering: 800 927.9474
Page 4
Table 3.
PI31xx-xx-EVAL1
Evaluation Board
Maximum I/O Ratings
Name
Max Voltage Max Current
IN+
100 V
20 A
IN-
100 V
20 A
OUT+
20 V
20 A
OUT-
20 V
20 A
TRIM_DN
10 V
100 mA
OPT1
10 V
100 mA
OPT2
10 V
100 mA
OUT
10 V
100 mA
INP
10 V
100 mA
INN
10 V
100 mA
ENABLE
10 V
100 mA
TRIM/SS
10 V
100 mA
SGND
10 V
100 mA
TM
10 V
100 mA
OUTP
20 V
100 mA
OUTN
20 V
100 mA
UG:301
vicorpower.com Applications Engineering: 800 927.9474
Page 5
UG:301
vicorpower.com IN–
IN+
F1
C20
C21
L1
C1
C2
C3
C4
+
C5
TRIM_UP
TRIM_DN
R1
C6
390 pF
ENA
ENABLE TRIM/SS
301 K
R3
90.9 K
C7
DNP
INN
R2
100
R4
100 K
TM
OPT1
–IN
HS
4.7nF
CY3
ENABLE
YN
4.7nF
CY4
4.7nF
4.7nF
PI31xx
CY2
TRIM/SS
TM
SGND
+IN
YP
CY1
YN
–OUT
+OUT
YP
OPT2
C8
OUTN
OUTP
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
Scope
OUT
OUT–
OUT+
Schematic Diagram
HS
SGND INP
Figure 5.
Applications Engineering: 800 927.9474
Page 6
Table 4.
PI3101-00-EVAL1
Evaluation Board BOM
Table 5.
PI3105-00-EVAL1
Evaluation Board BOM
Item
Qty
Ref Design
Part #
Value U/M Description
1.
1
U1
PI3101-00-HVIZ
NA
EA
10u
F
Murata X7R Ceramic Capacitor 10 V or equiv.
Picor PI3101-00 High Density PSiP
2.
12
C8-C19
GRM21BR71A106KE5
3.
6
C1-C4, C20C21
GRM31CR72A105KE1
1u
F
Murata X7R Ceramic Capacitor 100V or equiv.
4.
4
CY1-CY4
GRM31BR73A472K
4700p
F
Murata X7R Ceramic Capacitor 1kV or equiv..
5.
1
L1
FP3-4R7-R
4.7u
H
Coilcraft Inductor
6.
1
C6
08055C391KAT2A
390p
F
Kemet X7R Ceramic Capacitor 50V 0805
7.
1
C5
EEU-FC2A470
47u
F
Panasonic Electrolytic Capacitor 100V
8.
1
R1
MCR10EZPF9092
90.9k
Ohm
Rohm Resistor 0805 1% or equiv
9.
1
R3
MCR10EZPF3013
301k
Ohm
Rohm Resistor 0805 1% or equiv
10.
1
R2
MCR10EZPF1003
100k
Ohm
Rohm Resistor 0805 1% or equiv
11.
1
R4
MCR10EZPF1000
100
Ohm
Rohm Resistor 0805 1% or equiv
12.
1
F1
13.
8
14.
1
15.
0154003DR
3
A
Littlefuse Fuseblock 3A SMT
5015KCT-ND
N/A
N/A
Digi-Key SMT PC Test Point
OUT
131503100
N/A
N/A
Tektronix Test Jack Assembly
6
ENABLE,
TRIM UP,
TRIM_DN
TSW-148-07-F-S
N/A
N/A
J,Header 0.1"
Item
Qty
Ref Design
Part #
1.
1
U1
PI3105-00-HVIZ
NA
EA
4.7u
F
Murata X7R Ceramic Capacitor 16V or equiv.
Value U/M Description
Picor PI3105-00 High Density PSiP
2.
6
C8-C19
GRM21BR71A475KE5
3.
6
C1-C4, C20C21
GRM31CR72A105KE1
1u
F
Murata X7R Ceramic Capacitor 100V or equiv.
4.
4
CY1-CY4
GRM31BR73A472K
4700p
F
Murata X7R Ceramic Capacitor 1kV or equiv..
5.
1
L1
FP3-R47-R
470n
H
Coilcraft Inductor
6.
1
C6
08055C391KAT2A
390p
F
Kemet X7R Ceramic Capacitor 50V 0805
7.
1
C5
EEU-FC2A470
47u
F
Panasonic Electrolytic Capacitor 100V
8.
1
R1
MCR10EZPF9092
90.9k
Ohm
Rohm Resistor 0805 1% or equiv
9.
1
R3
MCR10EZPF3013
301k
Ohm
Rohm Resistor 0805 1% or equiv
10.
1
R2
MCR10EZPF1003
100k
Ohm
Rohm Resistor 0805 1% or equiv
11.
1
R4
MCR10EZPF1000
100
Ohm
Rohm Resistor 0805 1% or equiv
12.
1
F1
13.
8
14.
1
15.
6
0154003DR
3
A
Littlefuse Fuseblock 3A SMT
5015KCT-ND
N/A
N/A
Digi-Key SMT PC Test Point
OUT
131503100
N/A
N/A
Tektronix Test Jack Assembly
ENABLE,
TRIM UP,
TRIM_DN
TSW-148-07-F-S
N/A
N/A
J,Header 0.1"
UG:301
vicorpower.com Applications Engineering: 800 927.9474
Page 7
Table 6.
PI3106-00-EVAL1
Evaluation Board BOM
Table 7.
PI3106-01-EVAL1
Evaluation Board BOM
Item
Qty
Ref Design
Part #
Value U/M Description
1.
1
U1
PI3106-00-HVMZ
NA
EA
2.
6
C8-C19
GRM21BR71E225KA73L
2.2u
F
3.
6
C1-C4, C20C21
GRM31CR71H475KA12K
4.7u
F
Murata X7R Ceramic Capacitor 50V or equiv.
4.
4
CY1-CY4
GRM31BR73A472K
4700p
F
Murata X7R Ceramic Capacitor 1kV or equiv..
5.
1
L1
FP3-R47-R
470n
H
Coilcraft Inductor
6.
1
C6
08055C391KAT2A
390p
F
Kemet X7R Ceramic Capacitor 50V 0805
7.
1
C5
EEU-FC1J101L
100u
F
Panasonic Electrolytic Capacitor 63V
8.
1
R1
MCR10EZPF9092
90.9k
Ohm
Rohm Resistor 0805 1% or equiv
Picor PI3106-00 High Density PSiP
Murata X7R Ceramic Capacitor 25V or equiv.
9.
1
R3
MCR10EZPF3013
301k
Ohm
Rohm Resistor 0805 1% or equiv
10.
1
R2
MCR10EZPF1003
100k
Ohm
Rohm Resistor 0805 1% or equiv
11.
1
R4
MCR10EZPF1000
100
Ohm
Rohm Resistor 0805 1% or equiv
12.
1
F1
0154008DR
8
A
13.
8
5015KCT-ND
N/A
N/A
Digi-Key SMT PC Test Point
14.
1
OUT
131503100
N/A
N/A
Tektronix Test Jack Assembly
15.
6
ENABLE,
TRIM UP,
TRIM_DN
TSW-148-07-F-S
N/A
N/A
J,Header 0.1"
Item
Qty
Ref Design
Part #
1.
1
U1
PI3106-01-HVIZ
NA
EA
2.
6
C8-C19
GRM21BR71E225KA73L
2.2u
F
Murata X7R Ceramic Capacitor 25V or equiv.
3.
6
C1-C4, C20C21
GRM31CR71H475KA12K
4.7u
F
Murata X7R Ceramic Capacitor 50V or equiv.
4.
4
CY1-CY4
GRM31BR73A472K
4700p
F
Murata X7R Ceramic Capacitor 1kV or equiv..
5.
1
L1
FP3-R47-R
470n
H
Coilcraft Inductor
6.
1
C6
08055C391KAT2A
390p
F
Kemet X7R Ceramic Capacitor 50V 0805
7.
1
C5
EEU-FC1J101L
100u
F
Panasonic Electrolytic Capacitor 63V
Littlefuse Fuseblock 8A SMT
Value U/M Description
Picor PI3106-01 High Density PSiP
8.
1
R1
MCR10EZPF9092
90.9k
Ohm
Rohm Resistor 0805 1% or equiv
9.
1
R3
MCR10EZPF3013
301k
Ohm
Rohm Resistor 0805 1% or equiv
10.
1
R2
MCR10EZPF1003
100k
Ohm
Rohm Resistor 0805 1% or equiv
11.
1
R4
MCR10EZPF1000
100
Ohm
Rohm Resistor 0805 1% or equiv
12.
1
F1
0154008DR
8
A
13.
8
5015KCT-ND
N/A
N/A
Digi-Key SMT PC Test Point
14.
1
OUT
131503100
N/A
N/A
Tektronix Test Jack Assembly
15.
6
ENABLE,
TRIM UP,
TRIM_DN
TSW-148-07-F-S
N/A
N/A
J,Header 0.1"
UG:301
vicorpower.com Littlefuse Fuseblock 8A SMT
Applications Engineering: 800 927.9474
Page 8
Table 8.
PI3109-00-EVAL1
Evaluation Board BOM
Table 9.
PI3109-01-EVAL1
Evaluation Board BOM
Item
Qty
Ref Design
Part #
Value U/M Description
1.
1
U1
PI3109-00-HVMZ
NA
EA
10u
F
Murata X7R Ceramic Capacitor 10V or equiv.
Picor PI3109-00 High Density PSiP
2.
6
C8-C19
GRM21BR71A106KE5
3.
6
C1-C4, C20C21
GRM31CR71H475KA12K
4.7u
F
Murata X7R Ceramic Capacitor 50V or equiv.
4.
4
CY1-CY4
GRM31BR73A472K
4700p
F
Murata X7R Ceramic Capacitor 1kV or equiv..
5.
1
L1
FP3-R47-R
470n
H
Coilcraft Inductor
6.
1
C6
08055C391KAT2A
390p
F
Kemet X7R Ceramic Capacitor 50V 0805
7.
1
C5
EEU-FC1J101L
100u
F
Panasonic Electrolytic Capacitor 63V
8.
1
R1
MCR10EZPF9092
90.9k
Ohm
Rohm Resistor 0805 1% or equiv
9.
1
R3
MCR10EZPF3013
301k
Ohm
Rohm Resistor 0805 1% or equiv
10.
1
R2
MCR10EZPF1003
100k
Ohm
Rohm Resistor 0805 1% or equiv
11.
1
R4
MCR10EZPF1000
100
Ohm
Rohm Resistor 0805 1% or equiv
12.
1
F1
13.
8
14.
1
15.
0154008DR
8
A
Littlefuse Fuseblock 8A SMT
5015KCT-ND
N/A
N/A
Digi-Key SMT PC Test Point
OUT
131503100
N/A
N/A
Tektronix Test Jack Assembly
6
ENABLE,
TRIM UP,
TRIM_DN
TSW-148-07-F-S
N/A
N/A
J,Header 0.1"
Item
Qty
Ref Design
Part #
1.
1
U1
PI3109-01-HVIZ
NA
EA
2.
6
C8-C19
GRM21BR71A106KE5
2.2u
F
3.
6
C1-C4, C20C21
GRM31CR71H475KA12K
4.7u
F
Murata X7R Ceramic Capacitor 50V or equiv.
4.
4
CY1-CY4
GRM31BR73A472K
4700p
F
Murata X7R Ceramic Capacitor 1kV or equiv..
5.
1
L1
FP3-R47-R
470n
H
Coilcraft Inductor
6.
1
C6
08055C391KAT2A
390p
F
Kemet X7R Ceramic Capacitor 50V 0805
7.
1
C5
EEU-FC1J101L
100u
F
Panasonic Electrolytic Capacitor 63V
Value U/M Description
Picor PI3109-01 High Density PSiP
Murata X7R Ceramic Capacitor 25V or equiv.
8.
1
R1
MCR10EZPF9092
90.9k
Ohm
Rohm Resistor 0805 1% or equiv
9.
1
R3
MCR10EZPF3013
301k
Ohm
Rohm Resistor 0805 1% or equiv
10.
1
R2
MCR10EZPF1003
100k
Ohm
Rohm Resistor 0805 1% or equiv
11.
1
R4
MCR10EZPF1000
100
Ohm
Rohm Resistor 0805 1% or equiv
12.
1
F1
0154008DR
8
A
13.
8
5015KCT-ND
N/A
N/A
Digi-Key SMT PC Test Point
14.
1
OUT
131503100
N/A
N/A
Tektronix Test Jack Assembly
15.
6
ENABLE,
TRIM UP,
TRIM_DN
TSW-148-07-F-S
N/A
N/A
J,Header 0.1"
UG:301
vicorpower.com Littlefuse Fuseblock 8A SMT
Applications Engineering: 800 927.9474
Page 9
Table 10.
PI3110-01-EVAL1
Evaluation Board BOM
Table 11.
PI3111-00-EVAL1
Evaluation Board BOM
Item
Qty
Ref Design
Part #
Value U/M Description
1.
1
U1
PI3110-01-HVIZ
NA
EA
2.2u
F
Murata X7R Ceramic Capacitor 25V or equiv.
Picor PI3110-01 High Density PSiP
2.
6
C8-C19
GRM21BR71E225KA73L
3.
6
C1-C4, C20C21
GRM31CR71H475KA12K
4.7u
F
Murata X7R Ceramic Capacitor 50V or equiv.
4.
4
CY1-CY4
GRM31BR73A472K
4700p
F
Murata X7R Ceramic Capacitor 1kV or equiv..
5.
1
L1
FP3-4R7-R
4.7n
H
Coilcraft Inductor
6.
1
C6
08055C391KAT2A
390p
F
Kemet X7R Ceramic Capacitor 50V 0805
7.
1
C5
EEU-FC2A470
47u
F
Panasonic Electrolytic Capacitor 100V
8.
1
R1
MCR10EZPF9092
90.9k
Ohm
Rohm Resistor 0805 1% or equiv
9.
1
R3
MCR10EZPF3013
301k
Ohm
Rohm Resistor 0805 1% or equiv
10.
1
R2
MCR10EZPF1003
100k
Ohm
Rohm Resistor 0805 1% or equiv
11.
1
R4
MCR10EZPF1000
100
Ohm
Rohm Resistor 0805 1% or equiv
12.
1
F1
13.
8
14.
1
15.
0154003DR
3
A
Littlefuse Fuseblock 3A SMT
5015KCT-ND
N/A
N/A
Digi-Key SMT PC Test Point
OUT
131503100
N/A
N/A
Tektronix Test Jack Assembly
6
ENABLE,
TRIM UP,
TRIM_DN
TSW-148-07-F-S
N/A
N/A
J,Header 0.1"
Item
Qty
Ref Design
Part #
1.
1
U1
PI3111-00-HVMZ
NA
EA
2.
6
C8-C19
GRM21BR71E225KA73L
2.2u
F
Murata X7R Ceramic Capacitor 25V or equiv.
3.
6
C1-C4, C20C21
GRM31CR71H475KA12K
4.7u
F
Murata X7R Ceramic Capacitor 50V or equiv.
4.
4
CY1-CY4
GRM31BR73A472K
4700p
F
Murata X7R Ceramic Capacitor 1kV or equiv.
5.
1
L1
FP3-4R7-R
4.7n
H
Coilcraft Inductor
6.
1
C6
08055C391KAT2A
390p
F
Kemet X7R Ceramic Capacitor 50V 0805
7.
1
C5
EEU-FC1J101L
100u
F
Panasonic Electrolytic Capacitor 63V
Value U/M Description
Picor PI3111-00 High Density PSiP
8.
1
R1
MCR10EZPF9092
90.9k
Ohm
Rohm Resistor 0805 1% or equiv
9.
1
R3
MCR10EZPF3013
301k
Ohm
Rohm Resistor 0805 1% or equiv
10.
1
R2
MCR10EZPF1003
100k
Ohm
Rohm Resistor 0805 1% or equiv
11.
1
R4
MCR10EZPF1000
100
Ohm
Rohm Resistor 0805 1% or equiv
12.
1
F1
0154003DR
3
A
13.
8
5015KCT-ND
N/A
N/A
Digi-Key SMT PC Test Point
14.
1
OUT
131503100
N/A
N/A
Tektronix Test Jack Assembly
15.
6
ENABLE,
TRIM UP,
TRIM_DN
TSW-148-07-F-S
N/A
N/A
J,Header 0.1"
UG:301
vicorpower.com Littlefuse Fuseblock 3A SMT
Applications Engineering: 800 927.9474
Page 10
Table 12.
PI31xx-xx-EVAL1
Packing List
Item
Qty
Part #
U/M
Description
1.
1
PI31xx-xx-EVAL1
EA
Evaluation PCB Assembly
2.
1
32786
EA
6.3mm Heatsink Assembly
3.
1
32784
EA
11mm Heatsink Assembly
4.
1
33855
EA
Heatsink Grounding Clip
5.
4
32434
EA
Heatsink Pushpins
6.
4
N/A
EA
Screw, 6-32
7.
4
N/A
EA
Nut, 6-32
Figure 6.
PI31xx-xx-EVAL1 Test Setup
OSCILLOSCOPE DC-20MHZ BW
DMM
+
DC
AMMETER 0-5A
+
-
+
CH1
-
CH2
ISOLATED DIFF.
AMPLIFIER
-
+ IN
+
DC
ELECT.
LOAD
0-30A
MIN
PS1
0-100V DC
5A
- IN
-
+
DMM
UG:301
vicorpower.com Applications Engineering: 800 927.9474
Page 11
Figure 7.
Top Layer
Artwork 3 Oz Copper
Top Layer
Figure 8.
Midlayer 1
Artwork 2 Oz Copper
Midlayer 1
Figure 9.
Midlayer 2
Artwork 2 Oz. Copper
Midlayer 2
UG:301
vicorpower.com Applications Engineering: 800 927.9474
Page 12
Figure 10.
Midlayer 3
Artwork 2 Oz. Copper
Midlayer 3
Figure 11.
Midlayer 4
Artwork 2 Oz. Copper
Midlayer 4
Figure 12.
Bottom Layer
Artwork 3 Oz. Copper
Bottom Layer
UG:301
vicorpower.com Applications Engineering: 800 927.9474
Page 13
Figure 13.
Mechanical Drawing
3.100”
2.600”
0.250”
0.250”
0.750”
0.335”
High Density Isolated DC-DC Converter
IN+
CY1
INP
C22
C21
CY2 OUTP
C19
C18
C17
C16
C4
C3
C2
C1
C5
OUT+
YP
L1
3.100”
0.150”
Cool-Power ® Series
Evaluation Board
F1
OUT
2.430”
OPT1 OPT2
TM
ENABLE
SGND
0.335”
C11
C10
C9
C8
INN
TRIM/SS
IN–
ENABLE
TRIM_UP
TRIM_DN
C15
C14
C13
C12
R1 C6
R4 R2
R3 C7
CY3
PI31
OUTN
OUT–
CY4
1.55”
YN
-
EVAL1
0.150”
0.750”
Ordering Information
The PI31xx Customer Evaluation Boards are specified by adding the suffix “-EVAL1” to
the base PI31xx-xx model number.
Go to http://www.vicorpower.com/cms/home/company/contact-us for
ordering information.
Rev 1.0
6/13
vicorpower.com Applications Engineering: 800 927.9474
Page 14