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TECHNICAL SPECIFICATIONS
(T
=25°C, airflow rate=300 LFM, V
A
PARAMETER
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms)
Operating Device Temperature(Openframe)
Operating Device Temperature(Heatspreader)
Storage Temperature
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off Converter Input Current
2
Inrush Current(I
t)
Input Terminal Ripple Current
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Load
Over Line
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Operating Output Power Range
Output DC Current Protection
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
Positive Step Change in Output Current
Negative Step Change in Output Current
Settling Time (within 1% Vout nominal)
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Maximum Output Capacitance
EFFICIENCY
100% Load
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Logic High (Module Off)
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Logic High (Module On)
ON/OFF Current (for both remote on/off logic)
ON/OFF Current (for both remote on/off logic)
Leakage Current(for both remote on/off logic)
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown(Openframe)
Over-Temperature Shutdown(Heatspreader)
DS_H48SA12025_05052008
=48Vdc, nominal Vout unless otherwise noted.)
in
NOTES and CONDITIONS
Please refer to fig24. for the measuring point
Please refer to fig25. for the measuring point
With 100uF external input cap
RMS, With 100uF/0.1ohm input cap, 100% Load
Pk-Pk, thru 12µH inductor, 5Hz to 20MHz, 100% Load
over sample load, line and temperature
100% Load, 1µF ceramic, 10µF tantalum
100% Load, 1µF ceramic, 10µF tantalum
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
100% Resistor load; 5% overshoot of Vout at startup
Over full input range; Over full temp range
Io=80% of Io, max; Ta=25°C,airflow rate=300 LFM
Please refer to Fig 24. for the measuring point
Please refer to Fig 25. for the measuring point
100ms
Vin=36V, 100% Load
120 Hz
Vin=48V, Io=Io.max, Tc=25℃
Io=Io,min to Io,max
Vin=36V to 75V
Tc=-40℃ to 100℃
5Hz to 20MHz bandwidth
Full input range
Full input range
Full input range
50% Io,max to 75% Io,max
75% Io,max to 50% Io,max
Vin=48V
Vin=48V
Von/off
Von/off
Von/off
Von/off
Ion/off at Von/off=0.0V
Ion/off at Von/off=3V
Logic High, Von/off=15V
Pout <= max rated power
Pout <= max rated power
Open frame
H48SA12025 (Standard)
Min.
Typ.
Max.
80
100
-40
122
-40
109
-55
125
2250
36
48
75
32.5
34
35.5
30.5
32
33.5
1
2
3
9.5
170
240
18
1
0.42
7
50
11.82
12
12.18
±10
±10
±120
11.64
12.36
60
120
30
60
0
25
0
300
110
150
400
400
400
12
28
12
28
10000
93.2
92.5
2250
10
1500
300
-2
1.2
3
18
-2
1.2
3
18
0.3
10
100
9.6
13.2
10
115
140
1.5
80
127
116
Units
Vdc
Vdc
°C
°C
°C
Vdc
Vdc
Vdc
Vdc
Vdc
A
mA
mA
2
A
S
A
mA
dB
Vdc
mV
mV
mV
V
mV
mV
A
W
%
mV
mV
uS
mS
mS
µF
%
%
Vdc
MΩ
pF
kHz
V
V
V
V
mA
uA
uA
V
%
%
M hours
grams
°C
°C
2
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