BWR Series
3 Watt, Dual Output DC/DC Converters
Performance/Functional Specifications
Typical @ TA = +2.°C under nominal line voltage and full-load conditions unless noted0
Absolute Maximum Ratings
Input
Input Voltage:
"D5" Models
"D12" Models
"D48" Models
Input Voltage Range:
12 Volts
20 Volts
80 Volts
"D5" Models
"D12" Models
"D48" Models
4.5-9 Volts (5V nominal)
9-18 Volts (12V nominal)
18-72 Volts (48V nominal)
Input Reverse-Polarity Protection
Current must be <2A. Brief duration
only. Fusing recommended.
Input Current
See Ordering Guide
Output Overvoltage Protection
Output Current
None
Input Filter Type ➁
Reverse-Polarity Protection
Pi
Current limited. Max. current and
short-circuit duration are model
dependent. "D12" and "D48"
can withstand
Yes (Instantaneous, 2A maximum)
Output
models
sustained output short
VOUT Accuracy (50% load)
Temperature Coefficient
Ripple/Noise (20MHz BW) ➁
Line/Load Regulation
Efficiency
1%, maximum
circuits.
0.02% per °C
Storage Temperature
–40 to +100°C
+300°C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1000Vdc, minimum
Lead Temperature (soldering, 10 sec.)
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the
Performance/Functional Speciꢀcations Table is not implied.
Isolation Voltage ➂
Current Limiting:
"D5" Models
Power-limiting technique, auto-recovery
Hiccup technique, auto-recovery
"D12" and "D48" Models
T E C H N I C A L N O T E S
Dynamic Characteristics
Transient Response (50% load step)
200µsec to 1% of ꢀnal value
Floating Outputs
Switching Frequency:
"D5" Models
200kHz
170kHz
Since these are isolated DC/DC converters, their outputs are "floating." Any
BWR model may be conꢀgured to produce an output of 10V, 24V or 30V
(for 5V, 12V or 15V models, respectively) by applying the load across
the +Output and –Output pins (pins 6 and 8), with either output grounded.
The Common (pins 5 and 7) should be left open. Minimum 20% loading is
recommended under these conditions.
"D12" and "D48" Models
Environmental
Operating Temperature ➃
(Ambient, no derating)
–25 to +75°C
–40 to +100°C
Storage Temperature
Physical
Filtering and Noise Reduction
Dimensions
Case Material
Pin Material
1.25" x 0.8" x 0.45" (31.8 x 20.3 x 11.4mm)
Diallyl phthalate, UL94V-0-rated
All BWR 3 Watt DC/DC Converters achieve their rated ripple and noise
speciꢀcations without the use of external input/output capacitors. In critical
applications, input/output ripple and noise may be further reduced by install-
ing electrolytic capacitors across the input terminals and/or low-ESR tanta-
lum or electrolytic capacitors across the output terminals. Output capacitors
should be connected between their respective output pin (pin 6 or 8) and
Common (pins 5 and 7) as shown in Figure 2. The caps should be located
as close to the power converters as possible. Typical values are listed in the
tables below. In many applications, using values greater than those listed
will yield better results.
RoHS: Gold plate over copper alloy
Non RoHS: Tin plate over copper alloy
Weight
0.5 ounces (14.2 grams)
➀ These power converters require a minimum 10% loading to maintain speciꢀed regulation.
Operation under no-load conditions will not damage these devices; however they may not
meet all listed speciꢀcations.
➁ Application-speciꢀc internal input/output ꢀltering can be recommended and perhaps added
internally upon request. Contact DATEL Applications Engineering for details.
➂ Devices can be screened or modiꢀed for higher guaranteed isolation voltages.
Contact DATEL Applications Engineering for details.
➃ Devices can be warranted or screened for lower-temperature operation.
Contact DATEL Applications Engineering for details. See DATEL's new BST 3W Models
for guaranteed operation to –40°C.
To Reduce Input Ripple
"D5" Models
"D12" Models
"D48" Models
47µF, 15V
10µF, 35V
4.7µF, 100V
To Reduce Output Ripple
5V Outputs
47µF, 10V, Low ESR
22µF, 20V, Low ESR
12/15V Outputs
In critical, space-sensitive applications, DATEL may be able to tailor the inter-
nal input/output ꢀltering of these units to meet your speciꢀc requirements.
Contact our Applications Engineering Group for additional details.
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