FEATURES
High efficiency: 84% @ 1.2V/ 12A
Size: 47.2mm x 29.5mm x 8.35mm
(1.86" x 1.16" x 0.33")
Low profile: 0.33"
Industry standard footprint and pin out
Surface mountable
Fixed frequency operation
Input UVLO, Output OCP, OVP
No minimum load required
2:1 input voltage range
Basic insulation
ISO 9001, TL 9000, ISO 14001,
QS9000, OHSAS18001 certified
manufacturing facility
UL/cUL 60950 (US & Canada)
recognized, and TUV (EN60950) certified
CE mark meets 73/23/EEC and
93/68/EEC directive
Delphi Series S48SA, 33W Family
DC/DC Power Modules: 48V in, 1.2V/12A out
The Delphi Series S48SA, surface mountable, 48V input, single
output, isolated DC/DC converters are the latest offering from a
world leader in power system and technology and manufacturing –
Delta Electronics, Inc. This product family provides up to 33 watts
of power or up to 12A of output current (1.8V or below). With
creative design technology and optimization of component
placement, these converters possess outstanding electrical and
thermal performance, as well as extremely high reliability under
highly stressful operating conditions. All models are protected from
abnormal input/output voltage and current conditions.
OPTIONS
Positive on/off logic
SMD or Through hole mounting
APPLICATIONS
Telecom/DataCom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_S48SA1R212_05122006
Delta Electronics, Inc.
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted)
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
Inrush Current(I
2
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 to 1% of Final value
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Maximum Output Capacitance
EFFICIENCY
100% Load
ISOLATION CHARACTERISTICS
Isolation Voltage
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(Hiccup)
GENERAL SPECIFICATIONS
Calculated MTBF
Weight
Over-Temperature Shutdown
NOTES and CONDITIONS
Min.
S48SA1R212NRFA
Typ.
Max.
80
100
102
125
48
34
32
2
35
7
0.01
5
50
1.17
1.20
±2
±2
100
1.15
30
5
0
13.2
15.6
35
35
200
6
6
1.23
±10
±5
300
1.25
75
20
12
18
100
100
12
12
2200
75
35.5
33.5
3
0.85
Units
Vdc
Vdc
°C
°C
Vdc
V
V
V
V
A
mA
mA
A
2
s
mA
dB
V
mV
mV
ppm/℃
V
mV
mV
A
A
mV
mV
µs
ms
ms
µF
%
V
MΩ
pF
kHz
0.8
15
1
50
+10
160
V
V
mA
uA
%
%
hours
grams
°C
100ms
Refer to Figure 18 for measuring point
1 minute
-40
-55
1500
36
32.5
30.5
1
100% Load, 36Vin
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Vin=48V, Io=50%Io.max, Ta=25℃
Io=Io,min to Io,max
Vin=36V to75V
Ta=-40℃ to 85℃
Over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF tantalum
Full Load, 1µF ceramic, 10µF tantalum
Output Voltage 10% Low
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
50% Io,max to 75% Io,max
75% Io,max to 50% Io.max
Full load; 5% overshoot of Vout at startup
82
1500
10
1500
330
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
Across Trim Pin & +Vo or –Vo, Pout≦max rated
Over full temp range; % of nominal Vout
Io=80% of Io, max; Tc=40°C
Refer to Figure 18 for measuring point
0
84
-10
115
125
TBD
18
115
2
DS_S48SA1R212_05122006
ELECTRICAL CHARACTERISTICS CURVES
85
80
75
70
65
60
55
50
1
2
3
4
5
6
7
8
9
10 11 12
36Vin
48Vin
75Vin
POWER DISSIPATION (W)
EFFICIENCY (%)
90
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
1
2
3
4
5
6
7
8
9 10 11 12
OUTPUT CURRENT (A)
36Vin
48Vin
75Vin
OUTPUT CURRENT (A)
Figure 1:
Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25
°
C.
INPUT CURRENT (A)
Figure 2:
Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25
°
C.
0.6
Io=10A
Io=6A
0.5
0.4
0.3
0.2
0.1
0.0
30
35
40
45
50
55
60
Io=1A
65
70
75
INPUT VOLTAGE (V)
Figure 3:
Typical input characteristics at room temperature.
Figure 4:
Turn-on transient at full rated load current (1 ms/div).
Top Trace: Vout (500mV/div); Bottom Trace: ON/OFF Control
(5V/div).
3
DS_S48SA1R212_05122006
ELECTRICAL CHARACTERISTICS CURVES
Figure5
:
Turn-on transient at zero load current (1 ms/div). Top
Trace: Vout (500mV/div); Bottom Trace: ON/OFF Control
(5V/div).
Figure 6:
Output voltage response to step-change in load
current (50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF,
100 m
Ω
ESR tantalum capacitor and 1µF ceramic capacitor.
Top Trace: Vout (20mV/div), Bottom Trace: Iout (5A/div).
Figure 7
:
Output voltage response to step-change in load
current (75%-50% of Io, max; di/dt = 0.1A/µs). Load cap:
10µF,
100 m
Ω
ESR tantalum capacitor and 1µF
ceramic capacitor.
Top Trace: Vout (20mV/div), Bottom
Trace: Iout 5A/div).
Figure 8:
Test set-up diagram showing measurement points
for Input Reflected Ripple Current (Figure 9).
Note: Measured input reflected-ripple current with a simulated
source Inductance (L
TEST
) of 12
µH.
Capacitor Cs offset
possible battery impedance.
4
DS_S48SA1R212_05122006
ELECTRICAL CHARACTERISTICS CURVES
Copper Strip
Vo(+)
10u
Vo(-)
1u
SCOPE
RESISTIVE
LOAD
Figure 9
:
Input Reflected Ripple Current, is, at full rated output
current and nominal input voltage with 12
µ
H source impedance
and 33
µ
F electrolytic capacitor (2 mA/div).
Figure 10:
Output voltage noise and ripple measurement test
setup. Scope measurement should be made using a BNC
cable (length shorter than 20 inches). Position the load
between 51 mm to 76 mm (2 inches to 3 inches) from the
module.
OUTPUT VOLTAGE (V)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.0
Vin=48V
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
LOAD CURRENT (A)
Figure 11:
Output voltage ripple at nominal input voltage and
rated load current (10 mV/div). Load capacitance: 1
µ
F ceramic
capacitor and 10
µ
F tantalum capacitor. Bandwidth: 20 MHz.
Figure 12:
Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
5
DS_S48SA1R212_05122006
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