BWD Dual-Output DC-DC Series Data Sheet
2.5 Watts
Features
• Industry-standard DIP package
• Industry-standard pinout
• 85°C case operation
• Wide-range input
• Input pi filter
• 500V isolation
• Short-circuit protection
Description
BWD dual-output dc-dc converters offer excellent regulation and isolation in an industry-standard DIP package. With
several input voltage ranges, the BWD is ideal for industrial, telecom, and networking applications. The BWD features
short-circuit protection, a low profile, and 500 VDC isolation. Please see the BWS Series for single-output
applications.
Efficiency vs. Load (24V Input)
Technical Specifications
85
Input
Voltage Range
5 VDC Nominal
12 VDC Nominal
24 VDC Nominal
48 VDC Nominal
Reflected Ripple
Reverse Input Current
4.5 - 9 VDC
9 - 18 VDC
19 - 36 VDC
36 - 72 VDC
20% Iin Max.
100% Iin Max.
80
75
70
65
60
55
50
45
40
10
20
30
40
50
60
70
80
90
100
LOAD %
EFF.
BWD2415
EFF.
BWD2412
Output
Setpoint Accuracy
Line Regulation Vin Min. - Vin Max., Iout Rated
Load Regulation Iout Min. - Iout Max., Vin Nom.
Minimum Output Current
Dynamic Regulation, 1/4 to Full Load Step
Pk Deviation
Settling Time
Temperature Coefficient
Ripple and Noise, 20 MHz BW
Short Circuit Protection 1
Current Limit
±1%
±1.5% Vout
±2.5% Vout
10 % lout Rated
25% Iout
4% Vout
500
m
s
0.02%/°C
150 mV
Continuous Auto-restart
180%
Efficiency vs. Load (48V Input)
90
85
80
EFFICIENCY %
75
70
65
60
55
50
45
40
10
20
30
40
50
60
70
80
90
100
EFF.
BWD4812
EFF.
BWD4808
General
No Load Input Power
Switching Frequency
Isolation
Input - Output
Input - Case
Output - Case
Isolation Resistance - Input to Output
Isolation Capacitance - Input to Output
Case Temperature
Standard Operating Range
Storage Range
Humidity Max., Non-Condensing
Vibration, 3 Axes, 5 Min Each
Safety
Weight (Approx.)
REV. MAY 28, 2004
0.7 W
200 kHz
LOAD %
Notes
500 VDC
500 VDC
500 VDC
109 Ohms
80 pF
-25 to +85°C
-40 to +125°C
95%
5 g, 10 - 55 Hz
UL, cUL, TUV
0.7 oz
1 Continuous short circuit protection is provided. Long-term con-
tinuous operation in this mode is not recommended. Converter
will auto-restart once fault has been removed.
Specifications typically at 25°C, normal line, and full load, unless
otherwise stated.
Soldering Conditions: I/O pins, 260°C, ten seconds; fully
compatible with commercial wave-soldering equipment.
Safety: Agency approvals may vary from model to model. Please
consult factory for specific model information.
Page 1 of 2
BWD Dual-Output DC-DC Series Data Sheet
2.5 Watts
Model Selection
MODEL
INPUT VOLTAGE
(VOLTS)
INPUT VOLTAGE
RANGE (VOLTS)
MAXIMUM INPUT
CURRENT (AMPS)*
OUTPUT
VOLTAGE (VOLTS)
RATED OUTPUT
CURRENT (AMPS)
RIPPLE & NOISE
pk-pk (mV)
TYPICAL
EFFICIENCY**
BWD512
BWD515
BWD1205
BWD1212
BWD1215
BWD2405
BWD2412
BWD2415
BWD4805
BWD4812
BWD4815
NOTES:
5
5
12
12
12
24
24
24
48
48
48
4.5 - 9
4.5 - 9
9 - 18
9 - 18
9 - 18
18 - 36
18 - 36
18 - 36
36 - 72
36 - 72
36 - 72
0.92
0.93
0.42
0.46
0.46
0.46
0.23
0.23
0.10
0.11
0.11
±12
±15
±5
±12
±15
±5
±12
±15
±5
±12
±15
±0.125
±0.100
±0.250
±0.125
±0.100
±0.250
±0.125
±0.100
±0.250
±0.125
±0.100
150
150
150
150
150
150
150
150
150
150
150
79%
73%
73%
79%
79%
79%
79%
78%
76%
79%
79%
* Maximum input current at minimum input voltage, maximum rated output power.
** At nominal Vin, rated output.
Model numbers highlighted in yellow or shaded are not recommended for new designs.
Mechanical Drawing
0.80"
(20.3mm)
0.900"(22.9mm)
0.800"(20.3mm)
23
22
2
3
1.25"
(31.8mm)
0.18"(4.6mm)
BOTTOM VIEW
0.200"(5.1mm)
0.100"(2.5mm)
0
-0.175"(-4.5mm)
-0.10" 0
(-2.5mm)
Pin
1 & 24
2 & 23
3 & 22
4 & 21
5 & 20
6 & 19
7 & 18
8 & 17
9 & 16
10 & 15
11 & 14
12 & 13
DIA 0.020"
(0.5mm)
16
15
14
9
10
11
0.600"
(15.2mm)
Function
No Pin
- V
in
/ +V
in
- V
in
/ +V
in
No Pin
No Pin
No Pin
No Pin
No Pin
Common
No Conn.
-V
out
/ + V
out
No Pin
Pin:
± 0.002
± 0.05
Inches:
.XX ± 0.020
.XXX ± 0.010
0.52"
(13.2mm)
Thermal Impedance
Natural Convection
100 LFM
200 LFM
300 LFM
2.5 °C/W
2.1 °C/W
1.7 °C/W
1.3 °C/W
Tolerances
(Millimeters)
.X ± 0.5
.XX ± 0.25
Note:
Thermal impedance data is dependent on
many environmental factors. The exact
thermal performance should be validated
for specific application.
(Tolerances as listed unless otherwise
specified.)
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not authorized for use as critical components in life support systems, equip-
ment used in hazardous environments, or nuclear control systems without the express written consent of the respective divisional president of
Power-One, Inc.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
REV. MAY 28, 2004
Page 2 of 2
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