Details, datasheet, quote on part number: BWR-12/125-D48
CategoryPower Management => DC-DC Converters
Description12V 3W, Dual Output DC/DC Converter
CompanyDatel, Inc.
DatasheetDownload BWR-12/125-D48 datasheet
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Features, Applications


Low cost! Automated, SMT-on-pcb construction No external components required or ±15 Volt outputs Choice of 3 input voltage ranges: 4.5-9 Volts 9-18 Volts 18-72 Volts x 0.45" DIP form factor Industry-standard package and pinout Fully isolated, 1000Vdc guaranteed Guaranteed efficiencies to +75°C operation with no derating UL 1950, CSA 22.2 No. 234 and IEC 950 EMI/EMC characterized Modifications and customs for OEM's

Packaged in industry-standard DIP's, the 3 Watt dual-output models of DATEL's XWR Series DC/DC converters are fully regulated (±0.5% max. line, ±1% max. load), fully isolated (1000Vdc minimum), extremely efficient (as high as 78% guaranteed) building blocks providing true component-like flexibility and convenience to designers of modern distributed power systems. Exploiting high-frequency (170-200kHz), flyback topologies and contemporary, highly automated, SMT assembly techniques, BWR Model DC/DC's have enough room to include input (pi type) and output filters within their package. Offering true "plug-andplay" convenience, these power converters require no external components. They operate over the full to +75°C temperature range with no output power derating. Output voltages are either or ±15 Volts. Input voltage ranges are either 4.5-9V ("D5" models), 9-18V ("D12" models) or an ultra-wide 18-72V ("D48" models). Transient response time is a quick 200µsec. These extremely rugged modules are fully encapsulated with a thermally conductive potting compound. They are moisture and vibration resistant and have established a reputation for outstanding MTBF. For telecommunication, computer and other EMIsensitive applications, these DIP-packaged DC/DC converters offer full EMI/EMC characterization data. Industry-standard pinouts make DATEL's BWR Model 3W DC/DC's ideal replacements for other more costly, less reliable power converters. Similarly, they are excellent choices for new design-ins in systems demanding small size, low cost and high reliability.

DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048 (U.S.A.) Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 Email:

Typical = +25°C under nominal line voltage and full-load conditions unless otherwise noted. Ripple/Noise (R/N) measured over a 20MHz bandwidth. Balanced loads, to 100% load. Nominal line voltage, no-load/full-load conditions.

Output Configuration: B = Bipolar Wide Range Input Nominal Output Voltages: or ±15 Volts Input Voltage Range: = 4.5-9 Volts (5V nominal) = 9-18 Volts (12V nominal) = 18-72 Volts (48V nominal)

Maximum Output Current in mA from each output
I/O Connectiions Pin Function P2 +Input ­Input Common +Output Common ­Output
Typical = +25°C under nominal line voltage and full-load conditions, unless noted.

Input Voltage Range: "D5" Models "D12" Models "D48" Models Input Current Input Filter Type Reverse-Polarity Protection VOUT Accuracy (50% load) Temperature Coefficient Ripple/Noise (20MHz BW) Line/Load Regulation Efficiency Isolation Voltage Current Limiting: "D5" Models "D12" and "D48" Models Transient Response (50% load step) Switching Frequency: "D5" Models "D12" and "D48" Models Operating Temperature (Ambient, no derating) Storage Temperature Dimensions Case Material Pin Material Weight 4.5-9 Volts (5V nominal) 9-18 Volts (12V nominal) 18-72 Volts (48V nominal) See Ordering Guide Pi Yes (Instantaneous, 2A maximum) Input Voltage: "D5" Models "D12" Models "D48" Models

12 Volts 20 Volts 80 Volts Current must be <2A. Brief duration only. Fusing recommended. None Current limited. Max. current and short-circuit duration are model dependent. "D12" and "D48" models can withstand sustained output short circuits. +100°C +300°C

Input Reverse-Polarity Protection Output Overvoltage Protection Output Current

±1%, maximum ±0.02% per °C See Ordering Guide See Ordering Guide See Ordering Guide 1000Vdc, minimum Power-limiting technique, auto-recovery Hiccup technique, auto-recovery

Storage Temperature 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 Specifications Table is not implied.

Since these are isolated DC/DC converters, their outputs are "floating." Any BWR model may be configured to produce an output or 30V (for 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. Filtering and Noise Reduction All BWR 3 Watt DC/DC Converters achieve their rated ripple and noise specifications without the use of external input/output capacitors. In critical applications, input/output ripple and noise may be further reduced by installing electrolytic capacitors across the input terminals and/or low-ESR tantalum or electrolytic capacitors across the output terminals. Output capacitors should be connected between their respective output pin (pin 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. To Reduce Input Ripple "D5" Models "D12" Models "D48" Models To Reduce Output Ripple ±5V Outputs ±12/15V Outputs 47µF, 10V, Low ESR 22µF, 20V, Low ESR

x 11.4mm) Diallyl phthalate, UL94V-0-rated Brass, solder coated 0.5 ounces (14.2 grams)

These power converters require a minimum 10% loading to maintain specified regulation. Operation under no-load conditions will not damage these devices; however they may not meet all listed specifications. Application-specific internal input/output filtering can be recommended and perhaps added internally upon request. Contact DATEL Applications Engineering for details. Devices can be screened or modified for higher guaranteed isolation voltages. Contact DATEL Applications Engineering for details. 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.

In critical, space-sensitive applications, DATEL may be able to tailor the internal input/output filtering of these units to meet your specific requirements. Contact our Applications Engineering Group for additional details.


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