FULLERTON, CALIF. BI Technologies' 830 series of 6-watt dc/dc switching supplies is small enough to be molded into the plug of an ac power cord.
The units provide 5 to 18 volts dc from a 110- to 375-Vdc or rectified 80- to 265-Vac line, serving as a standalone source and in microprocessor-controlled appliances as well as a functioning as a replacement for wall-mount transformers in portable and consumer electronics.
"The 830 series modules cost just a few pennies more than the discrete components that an OEM would purchase separately to build its own supply," said Guido Gallioli, microcircuits and modules business manager. "That is a very small price to pay for a module that provides high efficiency (nominally 80 percent), comes fully tested and guaranteed and is available in a package that is smaller than anything the OEM could design in-house."
The module is touted as using an advanced switching circuit, operating at 500 kHz, that helps to reduce energy costs. Its ceramic substrate is said to let the module operate without an external heat sink.
The substrate incorporates integral screened resistors, set by active trimming at the factory, to provide drift-free operation over the life of the product. Input to output isolation is 2 kV (standard models) or 3.5 kV (custom models).
The 830 series, which is supplied in either vertical or horizontal single-in-line packaging for through-hole mounting and in a low-profile surface-mount configuration, will be priced under $6 each for volume OEM applications. Samples are available now.
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EETInfo No. 634