PI31XX-XX-EVAL1 Datasheet, PDF (4/14 Pages) Vicor Corporation – DC-DC Converter Evaluation Board

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
Type
Name
IN+
Input/Lug
IN-
Input/Lug
OUT+ Output/Lug
OUT- Output/Lug
TM
Test/Pin
SGND
Test/Pin
^{TRIM /SS Test/Pin}
ENABLE Test/Pin
IN ^{N Test/Pin}
IN ^{P Test/Pin}
YN ^Output/Pad
YP ^{Output/Pad
OU TP Test/Pin
OU TN Test/Pin}
OUT
Test/PIn

Description
Primary side positive input voltage terminal.
Primary side negative input voltage terminal.
Isolated secondary DC output voltage positive terminal.
Isolated secondary DC output voltage negative terminal.
Temperature measurement output pin with respect to SGND. 3V=300°K 10mV/°K
Signal ground, primary side referenced.
Monitor pin for the soft start voltage and trim voltage reference with
respect to SGND.
Allows for monitoring of the ENABLE signal with respect to SGND.
Kelvin sense connection for input supply (-) and input voltage measurement
test point.
Kelvin sense connection for input supply (+) and input voltage measurement
test point.
Optional test pad for connection of optional “YN” capacitor to external
system ground.
Optional test pad for connection of optional “YP” capacitor to external
system ground.
Kelvin sense connection for output voltage (+) and output voltage measurement
test point.
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
Name
ENABLE
TRIM_UP
TRIM_DN
OPT1
OPT2
Description
If strap is installed, unit is turned off. If strap is removed, unit will be enabled.
If strap is installed, PI3105 trims output voltage up 10%
If strap is installed, PI3105 trims output voltage down 10%
Allows optional connection of heat sink assembly to secondary return (-IN)
Allows optional connection of heat sink assembly to secondary return (-OUT)
UG:301
vicorpower.com
Applications Engineering: 800 927.9474
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