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A
Set-up time is the duration from turn the power supply input ON until its output
voltage goes up into an regulated limit. For example
of a 5V output power supply, Set-up time is from turn input ON to output voltage
up to 4.75V.A Hold-up time is a duration from turn the power supply input OFF
until its output voltage goes down into an unregulated limit. For example of
a 5V output power supply, Hold-up time is from turn input OFF to output voltage
down to 4.75V. Prodigit 3600A has the ability to measure
the set-up time and hold-up time of a power supply; it has programmable output
voltage level. The timing relationship of Set-up time and Hold-up time is shown
below.
2.1
Over voltage
A
power supply is expected to shut down its output voltage if it exceeds the maximum
specified voltage. The over voltage protection test demonstrates the ability
of a power supply to correctly response to any of these conditions.
The
over voltage protection feature is very important for sensitive loads such as
CPU, Memory, and logic circuitry, etc. Permanently damage will result if operating
voltage exceeds the specifications for a component.
Prodigit 3600A Power Supply Testers can test and measure a power supply's
OVP for both functional and actual over voltage readings. They require an optional
external DC source to trigger the OVP circuitry in closed-frame power supplies.
2.2
Over Current Protection
A
power supply is expected to shut down or limit its output current without damage
to itself or external circuits prior to exceeding specified limits. This shut
down should also occur to avoid damage to a power supply that could be caused
by defective components which can cause the supply to draw more current than
normal. The over current protection test demonstrates the ability of a power
supply to correctly response to any of these conditions.
Prodigit 3600A power supply testers can test and record readings at
each output for the power supply under test. The load current will increase
from a predetermined current until the output voltage drops to the programmed
threshold voltage limit.
2.3
Short Circuit Protection
A
power supply is expected to shut down or limit output current without damage
if its output is shorted to ground. The short circuit protection test demonstrates
the ability of the power supply under test to correctly response to any short
circuit conditions.
All
Prodigit 3310/3320 series Electronic Loads has a built-in
short circuit function key. The 3600 series power supply testers also have a
built-in short circuit protection function test. This allows for short voltage
and short current reading when performing the short circuit test.
