ZVS buck-boost regulator

17 May 2017 Power Electronics / Power Management

Vicor announced a new addition to its growing PI37xx family of Cool-Power ZVS buck-boost regulators. Delivering up to 140 Watts of power and up to 8 A of output current, at up to 96% efficiency, the new PI3740 features an input operating voltage range of 8–60 V d.c. and a regulated output voltage range of 10–50 V d.c. Incorporating proprietary high frequency zero-voltage switching (ZVS) technology, the PI3740 is an ideal choice for demanding, automotive, industrial, test automation, LED lighting and battery charging.

Like all members of the PI37xx family, the new device meets its performance specifications ‘out of the box’ across the full breadth of its operating voltage ranges without the need for special circuit customisations. Wide operating voltage ranges can enable a reduction in both the number of regulators and the number of power supply designs that must be designed, configured, manufactured, inventoried and maintained.

For example, a power supply incorporating a PI3740 can be designed to operate from, or charge, both a 12 V and a 24 V battery source. And all Vicor PI37xx buck-boost converters feature seamless transitioning between buck mode (input voltage is greater than output voltage) and boost mode (input voltage is less than output voltage) making them suitable for applications in which the regulator input voltage varies above and below the output voltage.

The PI3740 fully integrates its controller, power switches and support circuitry within a high density, thermally adept, 10 x 14 x 2,5 mm SiP (system-in-package). Other features include high-frequency (1 MHz) operation; parallel options; constant-voltage and constant-current (e.g, for LED lighting applications) operating modes; over-voltage, over-temperature and over-current protection; -40° to 115°C temperature range; and an integrated current sense amplifier and integrated general purpose amplifier.

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