Datasheet

DS_E48SC12008_03192012
2
LUO LUOTECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
E48SC12008 (Standard)
Min.
Typ.
Max.
Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
80
Vdc
Transient
100ms
100
Vdc
Operating Ambient Temperature
-40
85
°C
Storage Temperature
-55
125
°C
Input/Output Isolation Voltage
2250
Vdc
INPUT CHARACTERISTICS
Operating Input Voltage
36
75
Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold
33
34
35
Vdc
Turn-Off Voltage Threshold
31
32
33
Vdc
Lockout Hysteresis Voltage
1
2
3
Vdc
Maximum Input Current
100% Load, 36Vin
3.5
A
No-Load Input Current
80
mA
Off Converter Input Current
10
mA
Inrush Current(I
2
t)
1
A
2
s
Input Reflected-Ripple Current
P-P thru 12µH inductor, 5Hz to 20MHz
20
mA
Input Voltage Ripple Rejection
120 Hz
60
dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Vin=48V, Io=Io.max, Tc=25°C
11.88
12.00
12.12
Vdc
Output Voltage Regulation
Over Load
Io=Io,min to Io,max
±3
±15
mV
Over Line
Vin= 36V to 75V
±3
±15
mV
Over Temperature
Tc= -40°C to 85°C
±100
mV
Total Output Voltage Range
Over sample load, line and temperature
11.76
12.25
V
Output Voltage Ripple and Noise
5Hz to 20MHz bandwidth
Peak-to-Peak
Full Load, 1µF ceramic, 10µF tantalum
40
120
mV
RMS
Full Load, 1µF ceramic, 10µF tantalum
15
25
mV
Operating Output Current Range
0
8
A
Output DC Current-Limit Inception
Output Voltage 10% Low
110
140
%
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Positive Step Change in Output Current
25% Io.max to 50% Io.max
200
mV
Negative Step Change in Output Current
50% Io.max to 25% Io.max
200
mV
Settling Time (within 1% Vout nominal)
200
µs
Turn-On Transient
Start-Up Time, From On/Off Control
40
80
ms
Start-Up Time, From Input
40
80
ms
Maximum Output Capacitance
Full load; 5% overshoot of Vout at startup
2000
µF
EFFICIENCY
100% Load
48Vin
92.0
%
60% Load
48Vin
90.5
%
ISOLATION CHARACTERISTICS
Input to Output
2250
Vdc
Isolation Resistance
10
MΩ
Isolation Capacitance
1000
pF
FEATURE CHARACTERISTICS
Switching Frequency
350
400
kHz
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Von/off at Ion/off=1.0mA
-0.7
0.8
V
Logic High (Module Off)
Von/off at Ion/off=0.0 µA
3.5
12
V
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Von/off at Ion/off=1.0mA
-0.7
0.8
V
Logic High (Module On)
Von/off at Ion/off=0.0 µA
3.5
12
V
ON/OFF Current (for both remote on/off logic)
Ion/off at Von/off=0.0V
1
mA
Leakage Current (for both remote on/off logic)
Logic High, Von/off=12V
50
µA
Output Voltage Trim Range
Pout ≦ max rated power
-10%
10%
%
Output Voltage Remote Sense Range
Pout ≦ max rated power
10
%
Output Over-Voltage Protection
Over full temperature range
13.8
15.0
16.8
V
GENERAL SPECIFICATIONS
MTBF
Io=80% of Io, max; 300LFM @25C
2.2
M hours
Weight
Without heat-spreader
21.4
grams
Weight
With heat-spreader
33.5
grams
Over-Temperature Shutdown
( Without heat spreader, Hot spot 1)
Refer to Figure 19 for Hot spot 1 location
(48Vin,80% Io, 200LFM,Airflow from Vin+ to Vin-)
127
°C
Over-Temperature Shutdown
( Without heat spreader, NTC Resistor)
Refer to Figure 19 for NTC resistor location
123
°C
Over-Temperature Shutdown
(With heat spreader, Hot spot 2)
Refer to Figure 21 for Hot spot 2 location
(48Vin,80% Io, 200LFM,Airflow from Vin+ to Vin-)
118
°C
Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spots’ temperature is just for reference.