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