Product category:
DC/DC Convertors
News Release from: Datel (UK) | Subject: BWR-5/3.3 Series
Edited by the Electronicstalk Editorial
Team on 04 February 2002
Convertor offers independent 3.3 and 5V
outputs
Datel's BWR-5/3.3 Series of 30W dual-output, 5 and 3.3V DC/DC convertors offer affordable, total control over two independently regulated outputs.
Despite the pervasiveness of 3.3V and lower voltages in modern analogue/ digital signal-processing systems, there continue to be numerous +5V and -5V requirements - and not just in "legacy" designs In analogue signal processing (ASP), many new op amps and data convertors (A/D, D/A etc) require +5V (and sometimes -5V)
This article was originally published on Electronicstalk on 10 May 2001 at 8.00am (UK)
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Datel's BWR-5/3.3 Series of 30W dual-output, 5 and 3.3V DC/DC convertors offer affordable, total control over two independently regulated outputs.
The convertors have a single pair of (plus and minus) input pins and a pair of outputs providing +5V at up to 3A and +3.3V at to 4.25A).
But the convertors' pinouts incorporate two of every other function.
Two output return paths means no intermingling of ground currents and no ground-loop problems.
It also means, since both outputs are fully isolated and "floating", that the 5V output can be used as a -5 or -5.2V supply.
Two on/off control pins means total control for power-sequencing requirements.
Additionally, in power-conscious applications, designers can shut down the 5V electronics (perhaps an analogue circuit partition) when only the 3.3V partition (for example a DSP) is processing.
Two output trim pins means designers can adjust one or both of their power sources to be extremely accurate (beyond the initial +1.5% spec).
It also means in system test applications, users can independently "margin" their power supplies +5% as necessary.
Two sets of output-protection circuitry (including assorted shutdown mechanisms) means other portions of systems will continue to operate even if one suffers a catastrophic fault.
By having two independent control loops and sharing a single package, a single PCB, common input circuitry, and a common ferrite core (for the main transformer), Datel's BWR 30W convertors deliver all the desired performance and control features of two independent convertors at only slightly more than the price of one.
Synchronous rectification delivers an industry-leading 88% overall efficiency.
High efficiency packs the full 30W of deliverable power into the standard, 51 x 51 x 13mm plastic case traditionally reserved for 20W units.
The 30W BWR series operate at full rated power from -40 to +65C ambient, and require no supplemental airflow.
Lastly, synchronous rectification facilitates stable no-load operation, an important consideration for power-conscious applications where sections of circuits can go into "sleep mode".
BWR-5/3.3W duals incorporate all the I/O features designers have come to expect from Datel DC/DC convertors: input pi filters, input overvoltage and undervoltage shutdown, output overvoltage protection, output current limiting and continuous short-circuit protection (independent circuits for each output), as well as thermal shutdown.
Small quantities of BWR-5/3.3, 30W DC/DC convertors (or free sample/evaluation units) can be ordered from the Datel website using credit cards.
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