140W buck-boost regulator in 10×14 mm footprint

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By Graham Prophet

Regulated output voltage range is 10 – 50 VDC; incorporating Vicor’s proprietary high frequency zero-voltage switching (ZVS) technology, the PI3740 is suited for automotive, industrial, test automation, LED lighting, and battery charging. The PI37xx family, the PI3740 meets its performance specifications “out of the box” across the full breadth of its operating voltage ranges without the need for special circuit customizations. The converter, due its wide range, can be used in multiple applications that would otherwise require the use of several different alternative regulators having narrower operating voltage ranges. For example, a power supply incorporating a PI3740 can be designed to operate from, or charge, both a 12V and a 24V battery source. 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).


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 PI3740 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; -40º to 115ºC temperature range; and an integrated current sense amplifier and integrated general purpose amplifier.






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