PI3106-00-HVMZ_16 Datasheet, PDF (24/26 Pages) Vicor Corporation – Cool-Power ZVS Isolated DC-DC Converter Modules

TM
The TM pin serves as an output indicator of the internal package
temperature which is within +/- 5 °K of the hottest junction
temperature. Because of this, it is a good indicator of a thermal
overload condition. The output is a scaled, buffered analog voltage
which indicates the internal temperature in degrees Kelvin. Upon a
thermal overload, the TM pin is pulled low, indicating a thermal fault
has occurred. Upon restart of the converter, the TM pin reverts back
to a buffered monitor. The thermal shutdown function of the PI31xx-
00-HVMZ is a fault feature which interrupts power processing if a
certain maximum temperature is exceeded. TM can be monitored by
an external microcontroller or circuit configured as an adaptive fan
speed controller so that air flow in the system can be conveniently
regulated.
SGND
The PI31xx-00-HVMZ SGND pin is the “quiet” control circuitry
return. It is basically an extension of the internal signal ground. To
avoid contamination and potential ground loops, this ground should
NOT be connected to -IN since it is already star connected inside the
package. Connect signal logic to SGND, not -IN.
Output Power Pins +OUT And -OUT
The output power terminals OUT(+) and OUT(-) deliver the
maximum output current from the PI31xx-00-HVMZ through the J-
lead output pins. This configuration allows for a low impedance
output and should be connected to multi-layer PCB parallel planes
for best performance. Due to the high switching frequency, output
ripple and noise can be easily attenuated by adding just a few high
quality X7R ceramic capacitors while retaining adequate transient
response for most applications. The PI31xx-00-HVMZ does not
require any feedback loop compensation nor does it require any
opto-isolation. All isolation is contained within the package. This
greatly simplifies the use of the converter and eliminates all outside
influences of noise on the quality of the output voltage regulation
and feedback loop. It is important for the user to minimize resistive
connections from the load to the converter output and to keep stray
inductance to a minimum for best regulation and transient response.
The very small size footprint and height of the PI31xx-00-HVMZ
allows the converter to be placed in the optimum location to allow
for tight connections to the point of load. For those applications
absolutely requiring very tight regulation, contact Picor Engineering
at vicorpower.com for a remote sense application circuit which
can be used.
PI31xx-00-HVMZ
Cool-Power®
Page 24 of 26
Rev 1.6
02/2015
vicorpower.com
800 927.9474