Tyco Electronics Launches Q-Bus Series Converters
Tyco Electronics Power Systems Inc. (Dallas, TX) launched the new Q-Bus Series of ultra-high-efficiency, quarter-brick, dc/dc converters to support 12V intermediate bus architectures while minimizing costs and board space. The Q-Bus Series modules are capable of creating 300W, supporting multiple point-of-load (POL) converters.
The Q-Bus Series converters support two input-voltage ranges. The QBE025A0B module is capable of converting an input voltage of 42Vdc to 53Vdc into an output of 12Vdc at up to 25A. The QBK020A0B module accommodates a wider input range of 36Vdc to 55Vdc and provides an output voltage of 12V at up to 20A. Both have efficiency levels of up to 95%. All Q-Bus Series modules employ primary-side regulation to limit output-voltage variation to within ±5% of the nominal output voltage. In addition, the Q-Bus converters have an optional active load-sharing feature, enabling them to be connected in parallel for wider output scalability.
The high-efficiency, open-frame construction Q-Bus modules operate in temperatures from –40°F to +185°F (-40°C to +85°C). Improved thermal derating performance can be obtained by attaching heatsinks to an optional base plate. The industry-standard quarter-brick module measures 2.28in x 1.45in x 0.375in (57.9mm x 36.8mm x 9.53mm). The Q-Bus modules include a range of features to protect and enhance system reliability. Outputs are over-voltage and over-current protected, while inputs include under-voltage and over-voltage protection. Over-temperature protection is also included to protect against thermal overloads. The Q-Bus modules also offer remote on/off and monotonic output-voltage startup, even into pre-biased loads.
The Q-Bus modules are priced at $54.90 in 1,000-unit quantities. Samples are available now.
