DS_E48SB12020_05222008
2
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
E48SB12020 (Standard)
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
60
Vdc
Operating Temperature
Refer to Figure 18 for the measuring point
-40
128
°C
Storage Temperature
-55
125
°C
Input/Output Isolation Voltage
2250
Vdc
INPUT CHARACTERISTICS
Operating Input Voltage
38
48
55
Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold
35
36
37
Vdc
Turn-Off Voltage Threshold
33
34
35
Vdc
Lockout Hysteresis Voltage
1
2
3
Vdc
Input Over-Voltage Lockout
Turn-Off Voltage Threshold
57.5
58.5
59.7
Vdc
Turn-On Voltage Threshold
55.5
56.5
57.5
Vdc
Lockout Hysteresis Voltage
1
2
3
Vdc
Maximum Input Current
100% Load, 44V Vin
5.68
A
No-Load Input Current
85
100
mA
Off Converter Input Current
10
11
mA
Inrush Current (I
2
t)
0.02
A
2
s
Input Reflected-Ripple Current
P-P thru 12µH inductor, 5Hz to 20MHz
10
20
mA
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Vin=48V, Io=no load, Ta=25°C
11.85
Vdc
Output Voltage Regulation
Over Load
Io=Io,min to Io,max
300
400
mV
Over Line
Vin=38V to
55V
4.3
4.5
V
Over Temperature
Tc=-40°C to 105°C
250
mV
Total Output Voltage Range
over sample load, line and temperature
8.9
13.75
V
Output Voltage Ripple and Noise
5Hz to 20MHz bandwidth
Peak-to-Peak
Full Load, 1µF ceramic, 10µF tantalum
80
100
mV
RMS
Full Load, 1µF ceramic, 10µF tantalum
25
40
mV
Output current range when Vin below 44V
0
22.3
A
Operating Output Power Range
Output power range when Vin=44V and above
0
240
W
Output Current Protection
Vin=38V to 55V
110
130
%
Current share accuracy (2 units in parallel)
% of rated output current
10
%
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Positive Step Change in Output Current
50% Io.max to 75% Io.max
0
mV
Negative Step Change in Output Current
75% Io.max to 50% Io.max
0
mV
Settling Time (Vo deviation recover to 10% of max
deviation)
0
us
Turn-On Transient
Start-Up Time, From On/Off Control
100% Load
10
16
ms
Start-Up Time, From Input
100% Load
16
28
ms
Maximum Output Capacitance
3000
µF
EFFICIENCY
100% Load
96.3
%
60% Load
95.8
%
ISOLATION CHARACTERISTICS
Input to Output
2250
Vdc
Isolation Resistance
10
M
Ω
Isolation Capacitance
1000
pF
FEATURE CHARACTERISTICS
Switching Frequency
190
kHz
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Von/off
-0.7
0.8
V
Logic High (Module Off)
Von/off
2
18
V
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Von/off
-0.7
0.8
V
Logic High (Module On)
Von/off
2
18
V
ON/OFF Current (for both remote on/off logic) Ion/off
at
Von/off=0.0V
0.25
0.3
mA
Leakage Current (for both remote on/off logic)
Logic High, Von/off=15V
30
uA
GENERAL SPECIFICATIONS
MTBF
Io=80% of Io, max;
2.01
M hours
Weight
31.76
grams
Over-Temperature Shutdown
Refer to Figure 18 for the measuring point
130
°C