Power-One Premieres TXS Series of Three-Quarter Brick DC/DC Converters
Power-One (Boston, MA) announced the TXS Series of 100A, three-quarter brick dc/dc converters, measuring 2.4" x 3.45" x 0.5". Engineered at Power-One's Zurich research and development center, the converters were designed specifically for telecom and datacom equipment. They operate from a standard 48Vdc input and supply isolated low-voltage, low-noise output. Power-One claims that the input-output voltage combination of the TXS Series is suitable for use in distributed power architectures.
The new converters accept input voltage in the range of 36Vdc to 75Vdc. They have a single 100A output, with 100 degrees C base plate operation. There are three output voltages offered, 1.2Vdc, 1.5Vdc and 1.8Vdc. Their output voltage trim is ±10 percent, with a typical efficiency of 86.5 percent at 1.2Vdc; 87.5 percent at 1.5Vdc and 88.0 percent at 1.8Vdc. The topology of the devices consists of two power trains, two stages each interleaved. They have 16 transistors working in parallel for synchronous rectification, with a "universal" ceramic hybrid controller. The same hybrid controller will be used in other Power-One dc/dc converters.
With appropriate forced-air cooling, the TXS Series can deliver more than 150W at 1.2V to 1.8Vdc. Other TXS Series features include input under-voltage lockout plus overload and over-temperature protection. Interface features include remote shutdown and trim. The converters have basic insulation rating, and a 1,500Vdc I/O electrical strength test voltage. Power-One's goal is 150 LFM.
Power-One's director of technical marketing for dc/dc products, Brian Johnson, commented, "The advanced proprietary technology that we developed for the TXS Series is the perfect solution to our customers' needs to provide high currents to their advanced ICs. In designing the TXS, we have not only developed an advanced power solution, but we have set a precedent for the next generation of power devices that will be used to power the high-speed semiconductors that will increase the speed of the Internet."
Planned approvals for the TXS Series include cRUus and CE, as well as EN 60950 and UL 1950. The converters are priced at $260 each in 100-piece quantities, and samples will begin shipping in May, 2001.
