UG:307
vicorpower.com
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Page 8
Test Points Description
Each square point test point can be used with standard probes, clips or hooks. All test points are
labeled on the board. Each test point is accompanied with an adjacent socket for adding a test lead or
to facilitate wiring to external circuitry.
Reference Designator/
Functional name
Description
+VIN, PGND
Input voltage test points provide connection to input lugs. Use Kelvin (J101) to
avoid interconnection losses if accuracy is desired.
+VOUT, PGND
Output voltage test points provide connection to output lugs. Use Kelvin (J102)
to avoid interconnection losses if accuracy is desired.
VDR
A 5.1V auxiliary supply with max loading of 2mA. If used this pin must
have a series resistance such as R103 = 1k
Ω
with a decoupling cap of
0.1µF such as C124.
PWRGD
Power good indicator. During a regulator fault this pin is pulled internally
to signal ground.
EN
Input to the regulator. If left floating or driven high (V
EN_MAX
= 5.5V) regulator
will be enabled.
SGND
Internal logic ground.
TRK
Soft-start and track input. An external capacitor may be connected between TRK
pin and SGND to increase the rise time of the internal reference during soft-start.
COMP
Compensation pin. An internal 5KOhm is in series between this pin and the EAO
pin. A default C201 = 4.7nF is used.
EAO
Error Amp output. External connection for additional compensation and
current sharing.
EAIN_R
Error Amp Inverting Input separated with R222 = 0
Ω
.
VSP
Non-inverting input to an independent differential amplifier.
+VRS, -VRS
Non-isolated remote sense input. When selecting remote sense feedback connect
to the regulation point at the load.
J201
Used to inject the isolated signal of a network analyzer into the feedback look.
Pin injection point is depend on loop selection.
Table 1
Test Point Descriptions
