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TECHNICAL SPECIFICATIONS
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
No-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
Cross Regulation
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
Cross dynamic
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, (Logic Low-Module ON)
Logic Low
Logic High
ON/OFF Current
Leakage Current
Output Voltage Trim Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
DS_Q48DR1R833_03162007
(T
=25°C, airflow rate=300 LFM, V
A
NOTES and CONDITIONS
<100ms
Please refer to figure 27 for measuring point
100%load, 36Vin
P-P thru 12µH inductor, 5Hz to 20MHz
120Hz
Vin=48V, Io=Io.max, Tc=25 ℃
Io1=Io, min to Io, max, Io2=0A
Io2=Io, min to Io, max, Io1=0A
Vin=36V to 75V,Io1=Io2=full load
Worse Case
Tc=-40 ℃ to 85 ℃
Over sample load, line and temperature
5Hz to 20MHz bandwidth
Io1, Io2 Full Load, 1µF ceramic, 10µF tantalum
Io1, Io2 Full Load, 1µF ceramic, 10µF tantalum
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Iout1from 50% Io, max to 75% Io, max
Iout2 from 75% Io, max to 50% Io, max
Each channel independence
Full load; 5% overshoot of Vout at startup
Iout1, Iout2 full load, 48vdc Vin
Iout1, Iout2 60% of full load, 48vdc Vin
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Ion/off at Von/off=0.0V
Logic High, Von/off=15V
Pout ≦ max rated power
Over full temp range; %of nominal Vout
Io=80% of Io, max; Ta=25°C,300FLM
Please refer to figure 27 for measuring point
=48Vdc, nominal Vout unless otherwise noted.)
in
Q48DR1R833NRFA
Min.
Typ.
-40
-55
1500
36
48
33
34
31
32
1
2
100
5
0.015
10
50
Vout 1
1.771
1.800
Vout 2
3.247
3.300
Vout 1
±5
Vout 2
Vout 1
±3
Vout 2
±5
±15
Vout 1
1.746
Vout 2
3.201
Vout 1
40
Vout 2
40
Vout 1
10
Vout 2
10
Vout 1
0
Vout 2
0
Vout 1
100%
Vout 2
100%
Vout 1
100
Vout 2
100
Vout 1
100
Vout 2
100
150
10
10
Vout 1
Vout 2
88
88
1500
10
3000
350
0
-10
115
122
3.0
26.5
122
Max.
Units
80
Vdc
100
Vdc
114
°C
125
°C
Vdc
75
Vdc
35
Vdc
33
Vdc
3
Vdc
2.9
A
150
mA
10
mA
2
A
s
mA
dB
1.829
Vdc
3.353
±10
mV
±10
V
±10
mV
±50
1.854
V
3.399
V
80
mV
80
30
mV
30
15
A
15
150%
150%
mV
mV
20
mV
US
15
MS
15
mS
10000
µF
10000
%
%
Vdc
MΩ
pF
kHz
0.8
V
18
V
1
mA
50
uA
+10
%
130
%
M hours
grams
°C
2
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