Delta Electronics 33W Family User manual

DATASHEET
DS_S48SA1R812_06012006
Delta Electronics, Inc.
Delphi Series S48SA, 33W Family
DC/DC Power Modules: 48V in, 1.8V/12A out
The Delphi Series S48SA, surface mountable, 48V input, single
output, isolated DC/DC converter is 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 powe
r
or up to 12A of output current (for output voltage 1.8V or below). With
creative design technology and optimization of componen
t
placement, these converters possess outstanding electrical and
thermal performance, as well as extremely high reliability unde
r
highly stressful operating conditions. All models are protected from
abnormal input/output voltage and current conditions.
APPLICATIONS
 Telecom/DataCom
 Wireless Networks
 Optical Network Equipment
 Server and Data Storage
 Industrial/Test Equipment
OPTIONS
 Positive on/off logic
 Through hole version
FEATURES
 High efficiency: 88.5% @ 1.8V/ 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

DS_S48SA1R812_06012006
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER NOTES and CONDITIONS S48SA1R812NRFA
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous 80 Vdc
Transient (100ms) 100ms 100 Vdc
Operating Temperature Refer to Figure 18 for measuring point -40 100 °C
Storage Temperature -55 125 °C
Input/Output Isolation Voltage 1 minute 1500 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage 36 48 75 V
Input Under-Voltage Lockout
Turn-On Voltage Threshold 32.5 34 35.5 V
Turn-Off Voltage Threshold 30.5 32 33.5 V
Lockout Hysteresis Voltage 1 2 3 V
Maximum Input Current 100% Load, 36Vin 0.85 A
No-Load Input Current 30 mA
Off Converter Input Current 7 m
A
Inrush Current(I2t) 0.01 A2s
Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 5 mA
Input Voltage Ripple Rejection 120 Hz 50 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point Vin=48V, Io=50%Io.max, Ta=25℃1.77 1.80 1.83 V
Output Voltage Regulation
Over Load Io=Io,min to Io,max ±2 ±10 mV
Over Line Vin=36V to75V ±2 ±5 mV
Over Temperature Ta=-40C to 85C 100 300
pp
m/℃
Total Output Voltage Range Over sample load, line and temperature 1.73 1.87 V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 30 75 mV
RMS Full Load, 1µF ceramic, 10µF tantalum 5 20 mV
Operating Output Current Range 0 12 A
Output DC Current-Limit Inception Output Voltage 10% Low 13.2 15.6 18 A
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 35 100 mV
Negative Step Change in Output Current 75% Io,max to 50% Io.max 35 100 mV
Settling Time to 1% of Final value 200 µs
Turn-On Transient
Start-Up Time, From On/Off Control 6 12 ms
Start-Up Time, From Input 6 12 ms
Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 2200 µF
EFFICIENCY
100% Load 86 88 %
ISOLATION CHARACTERISTICS
Isolation Voltage 1500 V
Isolation Resistance 10 MΩ
Isolation Capacitance 1500 pF
FEATURE CHARACTERISTICS
Switching Frequency 330 kHz
ON/OFF Control, (Logic Low-Module ON)
Logic Low Von/off at Ion/off=1.0mA 0 0.8 V
Logic High Von/off at Ion/off=0.0 µA 15 V
ON/OFF Current Ion/off at Von/off=0.0V 1 mA
Leakage Current Logic High, Von/off=15V 50 uA
Output Voltage Trim Range
A
cross Trim Pin & +Vo or
–
Vo, Pout≦max rated -10 +10 %
Output Over-Voltage Protection(Hiccup) Over full temp range; % of nominal Vout 115 125 140 %
GENERAL SPECIFICATIONS
MTBF Io=80% of Io, max; Tc=40°C 6.29 M hours
Weight 18 grams
Over-Temperature Shutdown Refer to Figure 18 for measuring point 115 °C
2

DS_S48SA1R812_06012006
ELECTRICAL CHARACTERISTICS CURVES
55
60
65
70
75
80
85
90
95
123456789101112
OU TPU T C U RR EN T (A)
EFFICIENCY (%)
36Vin
48Vin
75Vin
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
123456789101112
OUTPUT CURRENT (A)
POWER DISSIPATION (W)
36Vin
48Vin
75Vin
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.
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE (V)
INPUT CURRENT (A)
Io=12A
Io=7.2A
Io=1.2A
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_S48SA1R812_06012006 4
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 (50mV/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 (50mV/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 (LTEST
)
of 12 µH. Capacitor Cs offset
possible battery impedance.

DS_S48SA1R812_06012006
ELECTRICAL CHARACTERISTICS CURVES
StripCopper
Vo(-)
Vo(+)
10u 1u SCOPE RESISTIV
E
LOAD
Figure 9:Input Reflected Ripple Current, is, at full rated output
current and nominal input voltage with 12µH source impedance
and 33µF 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.
0.0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
Vin=48V
Figure 11: Output voltage ripple at nominal input voltage and
rated load current (20 mV/div). Load capacitance: 1µF ceramic
capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz.
Figure 12: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
5