Vicor VI Chip PRM Evaluation Board - Manual (Page 7)

UG:013 vicorpower.com Applications Engineering: 800 927.9474 Page 7
Test Points Description
Each test point has a socket which accepts 0.015 – 0.025 inch diameter leads for easy
installation of solid wires and through-hole components. All the test points are brought
out to the edge of the board to allow for easy measurement and/or connection to the
user’s external circuitry. All test points are labeled and routed to the edge of the board.
Each test point is accompanied with an adjacent socket for adding a test lead or to
facilitate wiring to external circuitry.
Reference Functional Functional
Designator Name Description
TP30, +IN,
Input voltage test points provide kelvin connection to input pins of the PRM ® .
TP33 -IN
Use these test points for measuring the input voltage of the PRM to avoid
error due to interconnect losses.
TP31, +OUT,
Output voltage test points provide kelvin connection to output pins of the PRM.
TP32 -OUT
Use these test points for measuring the output voltage of the PRM to avoid
error due to interconnect losses.
TP34,
TP21, SGND
Signal Ground (SGND) test points are the ground reference for all control circuitry and
TP22
signal pins of the PRM.
TP28, CS+,
TP29 CS-
Used to measure the output current of the PRM across shunt resistor R25.
TP35, IM,
TP36 SG
Used to measure the output of current sense IC with reference to SGND.
SHARE/
TP10 CONTROL
Used to measure the SHARE/CONTROL NODE signal of the PRM with reference to
NODE
SGND test point.
TP11 AL
Used to measure the AL signal of the PRM with reference to SGND test point
in Adaptive Loop Operation.
TP12 TRIM
Used to measure the TRIM signal of the PRM with reference to SGND test point
in Adaptive Loop Operation.
TP13 VAUX Used to measure the VAUX signal of the PRM with reference to SGND test point.
REF/
TP14
REF_EN
Used to measure the REF/REF_EN signal of the PRM with reference to SGND.
TP15 VT
Used to measure the VT signal when connected to VTM ® TM pin with reference
to SGND in Adaptive Loop Operation.
TP16 ENABLE Used to measure the ENABLE signal with reference to SGND.
TP17 VC Used to measure the VC signal with reference to SGND.
TP18 IFB
Used to measure the IFB signal of the PRM with external constant current circuit
with reference to SGND in Remote Sense Operation.
TP43,
VREF
Used to measure the voltage reference signal of the error amplifier with reference
TP44 to SGND in Remote Sense Operation
TP19,
TP20
NC, NC No connect. For internal use only.
TP37, Can be used to inject the isolated signal of network analyzer for bode plot
TP38 measurement to measure the stability in Remote Sense Operation.
TP23, VG, Can be used to connect function generator to control the open drain
TP24 SG MOSFET in ENABLE control.
TP39, EXT AL, Can be used to enable Adaptive Loop control using external source when
TP41 SG AL control is selected using header P10 and jumper.
TP40, EXT TRIM, Can be used to enable TRIM control using external source when TRIM control
TP42 SG is selected using header P11 and jumper.
Table 2.
Test points description