FEATURES
High Efficiency: 88% @ 1.2V/25A
Size: 58.4mm x 22.8mm x 8.35mm
(2.30”x0.90”x0.33”)
Industry standard pin out
SMT and through-hole versions
Fixed frequency operation: 350KHz
Input UVLO, Output OCP, OVP, OTP
1500V isolation
Basic insulation
No minimum load required
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS 18001 certified manufacturing
facility
UL/cUL 60950 (US & Canada)
Recognized, and TUV (EN60950)
Certified
CE mark meets 73/23/EEC and
93/68/EEC directives
Delphi Series E48SR, 66W Eighth Brick Family
DC/DC Power Modules: 48V in, 1.2V/25A out
The Delphi Series E48SR Eighth Brick, 48V input, single output, isolated
DC/DC converter is 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 66 watts of power or 25A of output current (1.8V and
below) in an industry standard footprint. With creative design technology
and optimization of component placement, these converters possess
outstanding electrical and thermal performances, as well as extremely
high reliability under highly stressful operating conditions. All models are
fully protected from abnormal input/output voltage, current, and
temperature conditions. The Delphi Series converters meet all safety
requirements with basic insulation.
OPTIONS
SMT or through-hole version
Positive On/Off logic
Short pin lengths available
APPLICATIONS
Telecom/Datacom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Testing Equipment
DATASHEET
DS_E48SR1R225_02272007
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 Case 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 Over Current Protection
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 Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
NOTES and CONDITIONS
E48SR1R225 (Standard)
Min.
Typ.
Max.
75
100
+107
+125
1500
75
34
32
2
40
4
1
35
33
3
1.3
Units
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
%
%
Vdc
MΩ
pF
kHz
0.7
18
0.7
18
1
50
10
10
2.0
3.5
19.6
119
V
V
V
V
mA
uA
%
%
V
M hours
grams
°C
100ms
Please refer to figure 21 for measuring point
-40
-55
36
33
31
1
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 85°C
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
1.188
15
60
1.200
±2
±2
±15
1.176
40
10
0
110
60
60
200
6
6
1.212
±5
±5
1.224
90
20
25
140
Full load; 5% overshoot of Vout at startup
88.0
89.0
1500
10
1500
350
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
Ion/off at Von/off=0.0V
Logic High, Von/off=15V
Pout
≦
max rated power
Pout
≦
max rated power
Over full temp range; % of nominal Vout
Io=80% of Io, max; Ta=40°C, airflow rate=300FLM
Refer to Fig.21 for measuring point
2
2
-10
15000
DS_E48SR1R225_02272007
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_E48SR1R225_02272007
3
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
0
0
0
0
Figure 4:
Turn-on transient at full rated load current (resistive
load) (2 ms/div). Vin=48V. Top Trace: Vout, 0.5V/div; Bottom
Trace: ON/OFF input, 5V/div
Figure 5:
Turn-on transient at zero load current (2 ms/div).
Vin=48V. Top Trace: Vout, 0.5V/div; Bottom Trace: ON/OFF
input, 5V/div
For Positive Remote On/Off Logic
0
0
0
0
Figure 6:
Turn-on transient at full rated load current (resistive
load) (2 ms/div). Vin=48V. Top Trace: Vout, 0.5V/div; Bottom
Trace: ON/OFF input, 5V/div
Figure 7:
Turn-on transient at zero load current (2 ms/div).
Vin=48V. Top Trace: Vout, 0.5V/div; Bottom Trace: ON/OFF
input, 5V/div
DS_E48SR1R225_02272007
4
ELECTRICAL CHARACTERISTICS CURVES
0
0
0
0
Figure 8:
Output voltage response to step-change in load
current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap:
10µF tantalum capacitor and 1µF ceramic capacitor. Top Trace:
Vout (50mV/div, 200us/div), Bottom Trace: Iout (5A/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
Figure 9:
Output voltage response to step-change in load
current (75%-50%-75% of Io, max; di/dt = 2.5A/µs). Load cap:
470µF, 35m
Ω
ESR solid electrolytic capacitor and 1µF ceramic
capacitor. Top Trace: Vout (50mV/div, 200us/div), Bottom Trace:
Iout (5A/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
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 above
DS_E48SR1R225_02272007
5
