FEATURES
High efficiency: 90% @ 3.3V/10A
Industry standard 1x2 pinout
Size: 33.0 x 24.4 x
8.3mm
(1.30”x0.96”x0.33”)
SMD and Through-hole versions
Fixed frequency operation
Input UVLO, OVP
OTP and output OCP, OVP (default is
auto-restart)
Monotonic startup into normal and
pre-biased loads
2250V isolation and basic insulation
No minimum load required
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 S48SP, 35W 1x1 Brick
DC/DC Power Modules: 48V in, 3.3V/10A out
The Delphi Series S48SP, 1x1 Brick, 48V input, single output, isolated
DC/DC converters are the latest offering from a world leader in power
systems technology and manufacturing
―
Delta Electronics, Inc. This
product family is available in a surface mount or through-hole package
and provides up to 35 watts of power or 10A of output current (3.3V and
below) in a new 1x1 form factor (1.30”x0.96”x0.33”). The pinout is
compatible with the industry standard 1x2 products. 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. Typical efficiency of the 3.3V/10A module is better than 90%.
All modules are fully protected from abnormal input/output voltage,
current, and temperature conditions.
OPTIONS
SMD module available
Remote On/Off
Trim pin
OTP and Output OVP, OCP mode,
Auto-restart (default) or latch-up
Short pin lengths
Encapsulated case optional
APPLICATIONS
Optical Transport
Data Networking
Communications, including Wireless and
traditional Telecom
Servers
DATASHEET
DS_S48SP3R310_03062007
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 (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)
Leakage Current (for both remote on/off logic)
Output Voltage Trim Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
NOTES and CONDITIONS
S48SP3R310 (Standard)
Min.
Typ.
Max.
Units
80
100
110
125
2250
75
34
32
2
40
10
0.01
35.5
33.5
3.0
1.10
Vdc
Vdc
°C
°C
Vdc
Vdc
Vdc
Vdc
Vdc
A
mA
mA
A
2
s
mA
dB
Vdc
mV
mV
mV
V
mV
mV
A
%
mV
mV
us
ms
ms
µF
%
%
2250
10
1000
400
Vdc
MΩ
pF
kHz
0.8
18
0.8
18
0.25
-10%
3.8
1.98
10.5
117
30
10%
4.62
V
V
V
V
mA
uA
%
V
M hours
grams
°C
100ms
Refer to Figure 20 for the measuring point
-40
-55
36
32.5
30.5
1.0
100% Load, 36Vin
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Vin=48V, Io=Io.max, Tc=25°C
Io=Io, min to Io, max
Vin=36V to 75V
Tc=-40°C to 100°C
Over 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
3.25
10
60
3.3
±3
±3
±33
3.2
30
10
0
110
100
100
50
15
15
3.35
±10
±10
3.4
60
20
10
140
Full load; 5% overshoot of Vout at startup
90.0
89.0
5000
Von/off
Von/off
Von/off
Von/off
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; Ta=25°C; air flow 300LFM
Refer to Figure 20 for the measuring point
-0.7
2
-0.7
2
DS_S48SP3R310_03062007
2
ELECTRICAL CHARACTERISTICS CURVES
Figure 1:
Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C
Figure 2:
Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 3:
Typical full load input characteristics at room
temperature
DS_S48SP3R310_03062007
3
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
0
0
0
0
Figure 4:
Turn-on transient at full rated load current (5 ms/div).
Vin=48V. Top Trace: Vout, 1.0V/div; Bottom Trace: ON/OFF
input, 2V/div
Figure 5:
Turn-on transient at zero load current (5 ms/div).
Vin=48V. Top Trace: Vout, 1.0V/div, Bottom Trace: ON/OFF
input, 2V/div
For Positive Remote On/Off Logic
0
0
0
0
Figure 6:
Turn-on transient at full rated load current (5 ms/div).
Vin=48V. Top Trace: Vout, 1.0V/div; Bottom Trace: ON/OFF
input, 2V/div
Figure 7:
Turn-on transient at zero load current (5 ms/div).
Vin=48V. Top Trace: Vout, 1.0V/div; Bottom Trace: ON/OFF
input, 2V/div
DS_S48SP3R310_03062007
4
ELECTRICAL CHARACTERISTICS CURVES
0
0
0
Figure 8:
Output voltage response to step-change in load
current (75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF
tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout
(100mV/div, 50us/div), Bottom Trace: Iout (2A/div). 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
0
Figure 9:
Output voltage response to step-change in load
current (50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF
tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout
(100mV/div, 50us/div), Bottom Trace: Iout (2A/div). 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
0
Figure 10:
Test set-up diagram showing measurement points
for Input Terminal Ripple Current and Input Reflected Ripple
Current.
Note: Measured input reflected-ripple current with a simulated
source Inductance (L
TEST
) of 12 µH. Capacitor Cs offset
possible battery impedance. Measure current as shown below
Figure 11:
Input Terminal Ripple Current, i
c
, at full rated output
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (50 mA/div, 1us/div)
DS_S48SP3R310_03062007
5
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