©2013, KEPCO, INC
1
Data subject to change without notice
228-1568 REV 8
KEPCO, INC.
131-38 SANFORD AVENUE
FLUSHING, NY. 11355 U.S.A.
TEL (718) 461-7000
FAX (718) 767-1102
http://www.kepcopower.com
email: [email protected]
I N S T R U C T I O N M A N U A L
KEPCO
An ISO 9001 Company.
HSF-1UR
100W SERIES
KEPCO SINGLE OUTPUT, 1U SIZE, 100 WATT
HOT SWAP PLUG-IN POWER SUPPLIES
I — INTRODUCTION
The Kepco HSF-1UR 100 Watt Series hot swappable, high
frequency switching, plug-in power supplies with built-in
power factor correction (PFC) employ forward conversion
and are designed to operate in a fault tolerant power sys-
tem with either a-c or d-c input. A thermistor soft-start cir-
cuit limits start-up surge; an input fuse (3A, 250V) protects
against shorts. Built-in OR-ing diodes (all models) and a
forced current share circuit (all models except 3.3V) allow
configuration of all models for hot-swap and parallel-redun-
dant N+1 operation.
The heart of the HSF-1UR Series is a Kepco RTW power
supply allowing them to weigh less and have improved effi-
ciency (input current) specifications over the older HSF-1U
Series. There are three options available: C, X and Y. Fea-
tures for all models are the same except as follows: C
option (-1URC) models include a current sensing resistor,
allowing external current monitoring within ±10% (contact
Kepco if greater accuracy required). X option (-1URX) mod-
els have remote control, the ability to turn the unit on and
off from a remote location. Y option models (-1URY)
include both current monitoring and remote on-off capabili-
ties.
These power supplies are designed to be used with
Kepco’s Series RA 19-1U rack adapters. The RA 19-1U
rack adapter accepts up to four 50-, 100- or 150-Watt units
(see Figure 1). All input/output connections are through a
24-pin connector that plugs in to the rack adapter. All exter-
nal connections are made through the rack adapter (refer
to the RA 19-1U manual which is available for free down-
load at:
www.kepcopower.com/support/opmanls.htm#ra19-1u
Seven models may be selected for outputs of 3.3, 5, 12, 15,
24, 28 or 48V (see Table 1).
When the input is cut off, the output is maintained for 20
milliseconds minimum. If the power supply shuts down due
to an output overvoltage condition, it is then necessary to
wait 60 seconds minimum before turning the unit on again.
EMI filtering is designed to meet FCC Class B rating and
VDE 0871 Class B rating. Table 1 contains specifications
that vary for each model of the HSF-1UR 100 Watt Series.
Specifications common to all models are listed on page 4.
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, HSF-1UR 100W SERIES
MODEL
HSF 3.3-25-1UR
(1) (2) (6)
HSF 5-20-1UR
(1)
HSF 12-8.4-1UR
(1)
HSF 15-6.7-1UR
(1)
HSF 24-4.2-1UR
(1)
HSF 28-3.5-1UR
(1)
HSF 48-2-1UR
(1)
OUTPUT VOLTS, d-c (NOMINAL)
3.3V
5V
12V
15V
24V
28V
48V
ADJUSTMENT RANGE
2.8 - 3.5V
4.3 - 5.3V
11.4 - 12.6V
13.5 - 16.5V
19.2 - 26.0V
26.5 - 29.5V
44.0 - 52.0V
OUTPUT CURRENT (NOMINAL)
(3)
25A
(3)
20A
8.4A
6.7A
4.2A
3.5A
2A
OUTPUT POWER (MAXIMUM)
(4)
82.5W
100W
100.8W
100.5W
100.8W
100.8W
100.8W
RIPPLE AND
NOISE (mV p-p)
0-40°C,
10-100% LOAD
switching (typ)
80
80
100
100
150
150
200
spike noise
(d-c—50MHz)
120
120
150
150
200
200
300
OVERVOLTAGE SETTING
(25 °C, Nom. Input)
3.75 - 4.7V
5.6 - 6.4V
13.3 - 15.4V
16.8 - 18.8V
26.5 - 30.0V
29.7 - 34.7V
54.5 - 59.5V
OVERCURRENT SETTING
w(25 °C, Nom. Input)
Rectangular type characteristic
26.2A min.
21.0A min.
8.82A min.
7.03A min.
4.68A min.
3.8A min.
2.2A min.
Sense Resistor Value (milliohms)
(5)
5
5
10
20
20
30
50
(1) Unless otherwise noted, specifications are identical for all options.
(2) Forced current Share not available for 3.3V Models.
(3) Derates same as Output Power.
(4) See power rating curve, Figure 4. Exceeding maximum power rating may result in
oscillation or a drop in output current or voltage.
(5) C and Y Models only (see “Current Monitor.” on page 2 for details).
(6) Natural convection cooled; see Figure 5.
