KEPCO HSF-1UR 50W Series Operator Manual - Manual (Page 2)

2
228-1563 REV 10 083013
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]
FIGURE 1. 24V MODEL PEAK CURRENT REQUIREMENTS
BUILT-IN OR-ING DIODES. OR-ing diodes allow
configuration of all models for hot-swap and parallel-
redundant N+1 operation where current distribution is not
equal and the idle unit takes over in the event of failure.
FORCED CURRENT SHARE CIRCUIT. (Not appli-
cable to 3.3V models.) When units are configured for N+1
parallel redundant operation, it is desirable for current to
be divided equally among the paralleled supplies. When
the CSB (forced Current Share Bus) lines of paralleled
HSF-1UR units are connected together, the load current is
forced to divide equally between all paralleled units; units
operate at less than maximum, reducing stress and
increasing reliability of the system. If one unit fails, the
remaining units will continue to supply the load, and the
load current will be divided equally among the remaining
operating units. The failed unit is automatically isolated
from the circuit by a built-in isolation diode. Refer to Cur-
rent Share Bus (CSB) on page 4 for details.
TABLE 1. OUTPUT RATINGS AND SPECIFICATIONS, HSF-1UR 50W SERIES
HSF MODEL
HSF 3.3-10-1UR
(1) (2)
HSF 5-10-1UR
(1)
HSF 12-4.3-1UR
(1)
HSF 15-3.5-1UR
(1)
HSF 24-2.2-1UR
(1)(8)
HSF 28-1.8-1UR
(6)
HSF 48-1-1UR
(1)
OUTPUT VOLTS, d-c
(NOMINAL)
3.3V 5V 12V 15V 24V 28V 48V
ADJUSTMENT RANGE 2.8 - 3.4V 4.3 - 5.3V 11.4 - 12.6V 13.5 - 16.5V 22.5 - 25.5V 22.4 - 30.2V 45 - 51
OUTPUT CURRENT
(NOMINAL)
(3)
10A 10A 4.3A 3.5A
2.2A
(3.2A Peak
(8)
)
1.8A 1.1A
CURRENT LIMIT
(4)
10.5A min 10.5A min 4.5A min 3.68A min
3.3A (2.3A
(9)
)
min
1.9A min 1.15A min
OUTPUT POWER (MAX.)
(5)
33W 50W 51.6W 52.5W 52.8W 50.4W 52.8W
SHORT CIRCUIT CURRENT
(4)
15A (15.5
(9)
) 12.6A 5.6A 5.4A (4.5
(9)
) 3A
(9)
2.5A 2.4A (1.7A
(9)
)
RIPPLE
AND
NOISE
(mV p-p)
0-40°C,
10-100% LOAD
switching (typ) 80 80 100 100 100 150 200
spike noise
(d-c—50MHz)
120 120 150 150 150 200 300
OVERVOLTAGE SETTING
(25 °C, NOM. INPUT)
3.9 - 5.1V 5.7 - 6.4V 13.5 - 15.5V 16.8 - 18.8V 26.8 - 30.3V 32.0 - 35.0V 54.8 - 59.9V
Sense Resistor (Rs) Value
(7)
0.01 Ohm 0.01 Ohm 0.02 Ohm 0.03 Ohm 0.05 Ohm 0.05 Ohm 0.1 Ohm
(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) Current Limit is rectangular. After the overload is removed, output is
automatically restored.
(5) See power derating curve, Figure 5.
(6) 28V Model available with T, C, X and Y Options only.
(7) Sense resistor included on C and Y Models only (see
“Remote on-off.” on page 3 for Y option details).
(8) Peak current and thermal protection applicable to 24V
standard (no options) and C option models only. See Figure 1
for peak power requirements.
(9) T, X and Y Models only.
3043527
I 1
I
2
T
t
D=(t/T)
Standard (no options) and C option 24V Models can sup-
ply Peak current listed in Table 1 if the four conditions
listed below are met. This model includes thermal protec-
tion, voltage shutdown type. Restart by removing a-c
input; after sufficient cooling, reapply a-c input (wait at
least 30 seconds).
1. Time: t ≤ 10 Seconds
2. I
1
≤ Peak Current (Amperes)
3. Effective Current:
≤ Rated current (Amperes)
4. Effective Power P ≤ Maximum Power (Watts)
(output RMS current x output voltage)
DI1
2
I D – ( ) I2
2
Ч +