FEATURES
High efficiency:
Size:
90% @ 3.3V/ 20A
58.4mmx22.8mmx10.0mm
(2.30”x0.90”x0.39”)
Industry standard pin out
Fixed frequency operation
Input UVLO, Output OTP, OCP, OVP
Basic insulation
2250V isolation
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 directive
Delphi Series E24SR, 66W Eighth Brick Family
DC/DC Power Modules: 24V in, 3.3V/20A out
OPTIONS
The Delphi Series E24SR Eighth Brick, 24V 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 either a through-hole or surface-mounted
package and provides up to 66 watts of power or 20A of output current
(3.3V and below) in an industry standard footprint and pinout. The
E24SR converter operates from an input voltage of 18V to 36V and is
available in output voltages from 3.3V to 12V. Efficiency for the 3.3V
output is 90% at 20A full load. 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
fully protected from abnormal input/output voltage, current, and
temperature conditions. The Delphi Series converters meet all safety
requirements with basic insulation.
Positive On/Off logic
SMD pin
Short pin lengths available
APPLICATIONS
Telecom/DataCom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_E24SR3R320_02092007
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=24Vdc, 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 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
Back bias start-up
Back drive current limit while pin on-off is enabled
Back drive current limit while pin on-off is disabled
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 Pin Open Voltage
On/Off Pin Pull Down Resistance
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
NOTES and CONDITIONS
E24SR3R320 (Standard)
Min.
Typ.
Max.
36
50
129
125
2250
36
17
16
1
80
3
0.1
15
55
3.267
3.300
±3
±3
±30
3.234
50
15
0
110
100
100
150
5
5
3.333
±10
±10
3.366
100
30
20
140
17.8
17
1.5
4.3
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
0.1
50
10000
90
90.5
2250
10
1500
350
-0.7
3
-0.7
3
12
-10
4
TBD
22.0
132
0.5
18
0.5
18
9.6
10
10
A
mA
µF
%
%
Vdc
MΩ
pF
kHz
V
V
V
V
V
Kohm
%
%
V
M hours
grams
°C
100ms
Refer to figure 21 for measuring point
-40
-55
18
16
15
0.7
100% Load, 18Vin
Vin=18V to 36V
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Vin=24V, Io=Io.max, Tc=25°C
Io=Io, min to Io, max
Vin=18V to36V
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
24V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
≤
90% of nominal output voltage
Io=0A
Io=0A
Full load; 5% overshoot of Vout at startup
Pout
≦
max rated power
Pout
≦
max rated power
Over full temp range; % of nominal Vout
Io=80% of Io, max; Ta=25°C
,
airflow rate=300FLM
Refer to figure 21 for measuring point
DS_E24SR3R320_02092007
2
ELECTRICAL CHARACTERISTICS CURVES
94
91
88
85
82
79
76
73
70
4
8
12
16
20
18Vin
24Vin
36Vin
8.0
7.0
6.0
5.0
4.0
3.0
2.0
4
8
36Vi
18Vin
24Vin
12
16
20
Figure 1:
Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C
5.0
Figure 2:
Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
4.0
INTPUT CURRENT (A)
3.0
2.0
1.0
0.0
18
20
22
24
26
28
30
32
34
36
INPUT VOLTAGE (V)
Figure 3:
Typical full load input characteristics at room
temperature
DS_E24SR3R320_02092007
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) (1 ms/div). Vin=24V. Top Trace: Vout, 1.0V/div; Bottom
Trace: ON/OFF input, 10V/div
Figure 5:
Turn-on transient at zero load current (1 ms/div).
Vin=24V. Top Trace: Vout: 1.0V/div, Bottom Trace: ON/OFF
input, 10V/div
For Positive Remote On/Off Logic
0
0
0
0
Figure 6:
Turn-on transient at full rated load current (resistive
load) (1 ms/div). Vin=24V. Top Trace: Vout, 1.0V/div; Bottom
Trace: ON/OFF input, 10V/div
Figure 7:
Turn-on transient at zero load current (1 ms/div).
Vin=24V Top Trace: Vout, 1.0V/div; Bottom Trace: ON/OFF
input, 10V/div
DS_E24SR3R320_02092007
4
ELECTRICAL CHARACTERISTICS CURVES
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 (100mV/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
0
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 (100mV/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
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 above
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 (500 mA/div, 2us/div)
DS_E24SR3R320_02092007
5
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