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TECHNICAL SPECIFICATIONS
(T
=25°C, airflow rate=600 LFM, V
A
PARAMETER
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms)
Operating Temperature
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
Minimum -Load Input Current
Off Converter Input Current
2
Inrush Current(I
t)
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
Output DC Current-Limit Inception
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
Output Capacitive Load
EFFICIENCY
100% Load
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Input to Case
Output to Case
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
Leakage Current
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
H48SN28012_01172008
=48Vdc, nominal Vout unless otherwise noted.)
in
NOTES and CONDITIONS
Please refer to Fig.21 for measuring point
Per ETSI EN300 132-2
P-P thru 12µH inductor, 5Hz to 20MHz
Vin=48V, Io=Io.max, Tc=25°C
over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF Low ESR cap
Full Load, 1µF ceramic, 10µF Low ESR cap
Output Voltage 10% Low
48V, Tested with a aluminum ,10µF Low ESR cap
and 1µF Ceramic load cap, ΔIo/Δt=1A/10µS
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
Full load; 5% overshoot of Vout at startup
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Logic High, Von/off=15V
Across Pins 9 & 5, Pout ≦ max rated power
Pout ≦ max rated power
Over full temp range; % of nominal Vout
Io=80% of Io, max; Ta=25°C
Please refer to Fig.21 for measuring point
100ms
100% Load, 36Vin
120 Hz
Io=Io,min to Io,max
Vin=36V to 75V
Tc=-40°C to 100°C
Ion/off at Von/off=0.0V
H48SN28012 (Standard)
Min.
Typ.
Max.
80
100
-40
110
-55
125
2250
36
48
75
33
35
31
33
1
3
12.6
260
15
0.2
1
12
60
27.72
28.00
28.28
±20
±112
±20
±56
±250
±300
27.25
28.00
28.75
60
150
14
40
0.3
12.5
120
150
150
300
20
35
20
35
330
5000
91.0
91.5
2250
2250
500
10
1900
330
0
0.8
15
0
0.8
15
1
50
-40
+10
0.5
115
140
1.35
M hours
62
115
Units
Vdc
Vdc
°C
°C
Vdc
Vdc
Vdc
Vdc
Vdc
A
mA
mA
2
A
s
mA
dB
Vdc
mV
mV
mV
V
mV
mV
A
%
mV
mV
us
ms
ms
µF
%
%
Vdc
Vdc
Vdc
MΩ
pF
kHz
V
V
V
V
mA
uA
%
V
%
grams
°C
2
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