FEATURES
Efficiency up to 80%
Industry standard form factor and pinout
Body size:
5V & 12V:
11.5 x6.1 x10.2mm (0.45” x0.24” x0.40”)
24V:
11.5 x7.1 x10.2mm (0.45” x0.28” x0.40”)
Input: 5V, 12V, 24V
Output: 5, 9, 12, 15V
1000V isolation
UL 94V-0 Package Material
ISO 9001 and ISO14001 certified
manufacturing facility
Delphi DBU100 Series DC/DC Power
Modules: 5, 12, 24Vin, 1W 4-pin SIP
The Delphi DBU100, 5V, 12V, and 24V input, single output, 4-pin SIP
form factor, isolated DC/DC converter is the latest offering from a
world leader in power systems technology and manufacturing
―
Delta Electronics, Inc. The DBU100 series operate from 5V, 12V, or
24V (
±
10%) and provides 5V, 9V, 12V, or 15V of single output in an
industrial standard, plastic case encapsulated 4-pin ultra miniature
SIP package taking up as little as 0.18 square inches of board space.
This series provides up to 1W of output power with 1000V 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
DATASHEET
DS_DBU100_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
Transient
Internal Power Dissipation
Operating Temperature
Storage Temperature
Humidity
Lead Temperature in Assembly
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Maximum Input Current
No-Load Input Current
Reverse Polarity Input Current
OUTPUT CHARACTERISTICS
Output Voltage Set Point Accuracy
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 Short Circuit
Maximum Output Capacitance
EFFICIENCY
100% Load
ISOLATION CHARACTERISTICS
Isolation Voltage
Isolation Voltage Test
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
GENERAL SPECIFICATIONS
MTBF
Weight
Case Material
Flammability
Input Fuse
NOTES and CONDITIONS
5V input model, 1000ms
12V input model, 1000ms
24V input model, 1000ms
Ambient
Case
-0.7
-0.7
-0.7
-40
-40
-40
DBU100 (Standard)
Min.
Typ.
Max.
9
18
30
450
85
100
125
95
260
5
12
24
30
13
7
0.3
±1.0
±3.0
±1.5
±0.02
150
200
5
0.5
33
5.5
13.2
26.4
Units
Vdc
Vdc
mW
°C
°C
°C
%
°C
Vdc
Vdc
Vdc
Vdc
mA
mA
mA
A
%
%
%/C
mV
mV
mV
Second
µF
1.5mm from case for 10 seconds
1000
5V input model
12V input model
24V input model
Please see Model List table on page 6
5V model
12V model
24V model
4.5
10.8
21.6
Io=20% to 100%, please see page 6
For Vin change of 1%
Tc=-40°C to 100°C
5Hz to 20MHz bandwidth
Full Load, 0.33µF ceramic
Full Load, 0.33µF ceramic
Full Load, 0.33µF ceramic
Single output models
Please see Model List table on page 6
Input to output, 60 Seconds
Flash Test for 1 seconds
500VDC
100KHz, 1V
1000
1100
1000
±1.2
±0.01
100
60
50
90
1.3
1.7
100
110
Vdc
Vdc
MΩ
pF
kHz
M hours
grams
grams
MIL-HDBK-217F; Ta=25°C, Ground Benign
5V and 12V models
24V models
Non-conductive black plastic
UL94V-0
5V model, 500mA slow blown type
12V model, 200mA slow blown type
24V model, 100mA slow blown type
2
Notes:
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.
2
ELECTRICAL CHARACTERISTICS CURVES
100
90
Efficiency (%)
80
70
60
50
Efficiency (%)
90
80
70
60
50
40
30
20
Low
Nom
Input Voltage (V)
High
10
20
40
60
80
100
Load Current (%)
Figure 1:
Efficiency vs. Input Voltage (Single Output)
Figure 2:
Efficiency vs. Output Load (Single Output)
+Vo
+Vin
Bipolar
Push-Pull
Inverter
-Vin
-Vo
Figure 3:
Block diagram of DBU100 single output modules
3
Design & Feature Considerations
The DBU100 circuit block diagrams are shown in
Figure 3.
Maximum Capacitive Load
The DAU100 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. For optimum
performance we recommend 33uF maximum capacitive
load for DBU100 series.
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 0.33uF ceramic capacitor is
placed between the terminals shown below.
+Vin
Single Output
DC / DC
Converter
-Vin
-Out
+Out
Copper Strip
Cout
Scope
Resistive
Load
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 1.0uF
capacitors at the output.
+
+Vin
Single Output
DC / DC
Converter
-Vin
-Out
+Out
Input Source Impedance
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
DC Power
Source
-
Cout
Load
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.
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 5V input devices, a 1.0uF for the 12V
input devices, and a 0.47uF for the 24V devices.
4
THERMAL CONSIDERATIONS
Thermal management is an important part of the
system design. To ensure proper, reliable operation,
sufficient cooling of the power module is needed over
the entire temperature range of the module.
Convection cooling is usually the dominant mode of
heat transfer.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
THERMAL CURVES
DBU100series Output Current vs. Ambient Temperature and Air Velocity
(Either Orientation)
120%
Output Power (%)
100%
80%
60%
Natural
Convection
40%
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments encountered in most electronics
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in
which the power modules are mounted.
The following figure shows the wind tunnel
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The space between the facing PWB and
PWB is constantly kept at 25.4mm (1’’).
20%
0%
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 5:
Derating Curve
Figure 4:
Wind tunnel test setup
Thermal Derating
Heat can be removed by increasing airflow over the
module. To enhance system reliability, the power
module should always be operated below the maximum
operating temperature. If the temperature exceeds the
maximum module temperature, reliability of the unit
may be affected.
5
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