HP A Series User Manual

SECTION 1
GENERAL INFORMATION
1-1 DESCRIPTION
1-2 Hewlett-Packard modular power supplies are
completely solid-state, employing high-reiiability tran¬
sistors and integrated circuits. The power supplies are
packaged in three uniform height and depth cases that
are fractions of the standard 19-inch rack width. The
supplies can be bench-operated or rack-mounted indi¬
vidually or in any combination to full rack width or
less. The modular power supplies are of the Constant
Voltage/Current Limiting type, furnishing fuli-rated
output voltage at the maximum rated output current.
The output voltage can be adjusted between ±0.5 V or
±5% (whichever is greater) of nominal while providing
full-rated output current. The supply and load are
fully protected from current overloads by a self-restor¬
ing current cutback circuit that causes the output
current to cutback linearly from approximately 103%
to approximately 10% of rated output as the load
varies from slightly above the maximum rated value to
a complete short circuit. The current limit (cutback)
activation point is adjustable anywhere between the
103% and 10% limits.
1-3 Either the positive or negative output terminal
may be grounded at the rear terminals.
1-4 SCOPE
1-5 This manual provides installation procedures,
operating instructions, principles,of operation, main¬
tenance data, and replaceable parts information for the
thirty-three Hewlett-Packard modular power supplies
listed in the following chart. Note that the last two
digits in the model number indicate the nominal out¬
put voltage of the supply. The -A suffix supplies are
1/8-rack width units while the -C and -E models are
1/4-rack width units.
1-6 SCHEMATICS
1-7 The modular power supplies covered in this
manual are of similar design differing mainly in com¬
ponent values rather than in circuit operation. Hence,
in general, the information presented in the manual
applies to all of the power supply models with any
significant differences among the supplies described as
applicable. Thus, the schematic diagrams at the rear of
the manual depict groups of similar supplies with five
DC OUTPUT
MODEL NOMINAL VOLTAGE
(Minimum Adj. Span)
CURRENT
AT50“C
3V (±0.5V}
2A
62003A
4.25A
62003C
8.5A
62003E
4V(±0.5V)
2A
62004A
4A
62004C
8A
62004E
5V (±0.5V)
2A
62005A
4A
62005C
8A
62005E
6V (±0.5V)
1.75A
62006A
3.75A
62006C
7.5A
62006E
10V (±0.5V)
1.5A
6201OA
3.25A
62010C
6.5A
62010E
12V (±0.60V)
1.5A
62012A
3.0A
62012C
6.0A
62012E
15V (±0.75V)
1.25A
62015A
2.SA
62015C
5.0A
62015E
18V{±0.90V)
1.0A
62018A
2.25A
62018C
4.5A
62018E
24V (± 1.20V)
.75A
62024A
1.75A
62024C
3.75A
62024E
28V (± 1.40V)
.7A
62028A
1.5A
62028C
3.25A
62028E
48V(±2.40V)
.45A
.62048A
1.0A
62048C
2.0A
62048E
1-1

HP A Series Specifications

General

Model	HP A Series
Category	Power Supply
Input Voltage	100-240V AC
Input Frequency	50/60 Hz
Cooling	Fan
Connectors	SATA, Molex
Efficiency	80% or higher (80 Plus Certified)