FEATURES
Efficiency up to 80%
Industry standard form factor and pinout
Body size:
25.95 x9.25 x12.45mm
(1.02” x0.36” x0.49”)
Input: 5V, 12V, 24V, 48V (2:1)
Output: 3.3, 5, 12, 15,
±5, ±12, ±15V
Output OCP, SCP
Low ripple and noise
1500V isolation
UL 94V-0 Package Material
ISO 9001 and ISO14001 certified
manufacturing facility
Delphi DEW1000 Series DC/DC Power
Modules: 24, 48Vin, 2W SIP
The Delphi DEW1000, 24V and 48V 4:1 wide input, single or dual
output, DIP form factor, isolated DC/DC converter is the latest
offering from a world leader in power systems technology and
manufacturing
―
Delta Electronics, Inc. The DEW1000 series
operate from 24V or 48V (4:1) and provides 3.3V, 5V, 12V, or 15V of
single output or
±
5V,
±
12V, or
±
15V of dual output in an industrial
standard, plastic case encapsulated SIP package. This series
provides up to 2W of output power with 1500V isolation and a typical
full-load efficiency up to 80%. 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.
OPTIONS
APPLICATIONS
Industrial
Transportation
Process/ Automation
Telecom
Data Networking
DATASHEET
DS_DEW1000_12032008
TECHNICAL SPECIFICATIONS
T
A
= 25°C, airflow rate = 0 LFM, nominal Vin, nominal Vout, resistive load unless otherwise noted.
PARAMETER
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Transient
Transient
Internal Power Dissipation
Operating Temperature
Storage Temperature
Humidity
Lead Temperature in Assembly
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Maximum Input Current
No-Load Input Current
Input Reflected Ripple Current
Short Circuit Input Power
Reverse Polarity Input Current
OUTPUT CHARACTERISTICS
Output Voltage Set Point Accuracy
Output Voltage Balance
Output Voltage Regulation
Over Load
Over Line
Over Temperature
Output Voltage Ripple and Noise
Peak-to-Peak
Peak-to-Peak, over line, load, temperature
RMS
Output Over Current/Power Protection
Output Short Circuit
Output Voltage Current Transient
Step Change in Output Current
Settling Time (within 1% Vout nominal)
Maximum Output Capacitance
NOTES and CONDITIONS
24V input model, 1000ms
48V input model, 1000ms
Ambient
Case
DEW1000 (Standard)
Min.
-0.7
-0.7
-40
-40
-55
Typ.
Max.
50
100
2500
85
100
105
95
260
12, 24
24, 48
6
12
---
---
20
15
300
600
1.5
0.5
±1.0
±1.0
±0.5
±0.3
±0.01
30
120
±3
100
±5
300
2200
1000
170
110
470
100
47
±2.0
±2.0
±0.75
±0.5
±0.02
50
75
15
36
75
8.5
17
8
16
Units
Vdc
Vdc
mW
°C
°C
°C
%
°C
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mA
mA
mA
mA
W
A
%
%
%
%
%/C
mV
mV
mV
%
%
uS
µF
µF
µF
µF
µF
µF
µF
1.5mm from case for 10 seconds
1500
24V model
48V model
24V model
48V model
24V model
48V model
Please see Model List table on page 6
24V model
48V model
24V model
48V model
All models
All models
Dual output models
Io=25% to 100%
Vin= Vin,min to Vin,max
Tc=-40°C to 71°C
5Hz to 20MHz bandwidth
Full Load, 0.47µF ceramic
Full Load, 0.47µF ceramic
Full Load, 0.47µF ceramic
Auto restart
Continuous
25% step change
3.3Vo
5Vo
12Vo
15Vo
±5Vo,
each output
±12Vo,
each output
±15Vo,
each output
Please see Model List table on page 6
Input to output, 60 Seconds
Flash Test for 1 seconds
500VDC
100KHz, 1V
1500
1650
1000
250
300
Von/off
Von/off at Ion/off=1.0mA
Logic High, Von/off=5V
MIL-HDBK-217F; Ta=25°C, Ground Benign
Non-conductive black plastic
UL94V-0
24V model, 350mA slow blown type
48V model, 135mA slow blown type
-0.7
2.9
1
1
6.5
9
18
4.5
8.5
---
---
EFFICIENCY
100% Load
ISOLATION CHARACTERISTICS
Isolation Voltage
Isolation Voltage Test
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control
Logic Low (module is on)
Logic High (module is off)
ON/OFF Current
Standby Input current
GENERAL SPECIFICATIONS
MTBF
Weight
Case Material
Flammability
Input Fuse
500
Vdc
Vdc
MΩ
pF
kHz
0.6
15
1
3
V
V
mA
mA
M hours
grams
2
ELECTRICAL CHARACTERISTICS CURVES
Figure 1:
Efficiency vs. Input Voltage (Single Output)
Figure 2:
Efficiency vs. Input Voltage (Dual Output)
Figure 3:
Efficiency vs. Output Load (Single Output)
Figure 4:
Efficiency vs. Output Load (Dual Output)
3
Test Configurations
Input Reflected-Ripple Current Test
Setup
To Oscilloscope
+
Battery
+
Lin
Current
Probe
+Vin
+Out
DC / DC
Converter
-Vin
-Out
Design & Feature Considerations
The DEW1000 circuit block diagrams are shown in
Figures 5 and 6.
+Vin
Load
LC
Filter
+Vo
Cin
-Vo
PFM
Isolation
Ref.Amp
Input reflected-ripple current is measured with a
inductor Lin (4.7uH) and Cin (220uF, ESR < 1.0Ω at
100 KHz) to simulate source impedance. Capacitor
Cin is to offset possible battery impedance. Current
ripple is measured at the input terminals of the
module and measurement bandwidth is 0-500 KHz.
-Vin
Figure 5:
Block diagram of DEW1000 single output
modules.
Peak-to-Peak Output Noise Measurement
Scope measurement should be made by using a
BNC socket, measurement bandwidth is 0-20 MHz.
Position the load between 50 mm and 75 mm from
the DC/DC Converter. A Cout of 0.47uF ceramic
capacitor is placed between the terminals shown
below.
+Vin
Single Output
DC / DC
Converter
-Vin
-Out
+Out
Copper Strip
Cout
Resistive
Scope
Load
+Vin
LC
Filter
+Vo
Com
-Vo
PFM
Isolation
Ref.Amp
-Vin
Figure 6:
Block diagram of DEW1000 dual output
modules.
Input Source Impedance
Copper Strip
Cout
Scope
Resistive
Load
Scope
+Vin
Dual Output
DC / DC
Converter
-Vin
+Out
Com.
The power module should be connected to a low ac-
impedance input source. Highly inductive source
impedances can affect the stability of the power
module.
+
DC Power
Source
-
+
Cin
-Vin
-Out
+Vin
DC / DC
Converter
+Out
Load
Cout
-Out
In applications where power is supplied over long lines
and output loading is high, it may be necessary to use
a capacitor at the input to ensure startup.
Capacitor mounted close to the input of the power
module helps ensure stability of the unit, it is
recommended to use a good quality low Equivalent
Series Resistance (ESR < 1.0Ω at 100 KHz) capacitor
of a 1.5uF for the 24V and 48V devices.
4
Design & Feature Considerations
Overcurrent Protection
Maximum Capacitive Load
The DEW1000 series has limitation of maximum
connected capacitance at the output. The power
module may be operated in current limiting mode
during start-up, affecting the ramp-up and the startup
time. The maximum allowed capacitive load is listed in
table on page 2.
To provide protection in a fault (output overload) condition,
the unit is equipped with internal current limiting circuitry
and can endure current limiting for an unlimited duration.
At the point of current-limit inception, the unit shifts from
voltage control to current control. The unit operates
normally once the output current is brought back into its
specified range.
Output Ripple Reduction
A good quality low ESR capacitor placed as close as
practicable across the load will give the best ripple and
noise performance.
To reduce output ripple, it is recommended to use
3.3uF capacitors at the output.
+
DC Power
Source
-
-Vin
+Vin
Single Output
DC / DC
Converter
-Out
+Out
Soldering and Cleaning Considerations
Post solder cleaning is usually the final board assembly
process before the board or system undergoes electrical
testing. Inadequate cleaning and/or drying may lower the
reliability of a power module and severely affect the
finished circuit board assembly test. Adequate cleaning
and/or drying is especially important for un-encapsulated
and/or open frame type power modules. For assistance
on appropriate soldering and cleaning procedures,
please contact Delta’s technical support team.
Notes:
Cout
Load
+
DC Power
Source
-
+Vin
+Out
Dual Output
DC / DC
Com.
Converter
Cout
Load
1. These power converters require a minimum output load
to maintain specified regulation (please see page 6 for
the suggested minimum load). Operation under no-load
conditions will not damage these modules; however,
they may not meet all specifications listed above.
2. These DC/DC converters should be externally fused at
the front end for protection.
-Vin
-Out
Remote On/Off
The DEW1000 has negative remote on/off logic.
Negative logic remote on/off turns the module on during
a logic low voltage on the remote on/off pin, and off
during a logic high.
Remote on/off can be controlled by an external switch
between the on/off terminal and the -Vin terminal. The
switch can be an open collector or equivalent.
ON/OFF
Vo(-)
Vi(-)
Vi(+)
Vo(+)
5
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