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The latest Electronics Weekly product news on power supplies.

New topology gives TI 10MHz dc-dc conversion

TI TPS54A20 dc dc

Texas Instruments has unveiled a new dc-dc topology, and with it is claiming industry’s highest current density for a 12V, 10A, 10MHz dc-dc converter at 50A/cm3. Similar to a two-phase buck converter, the added series capacitor allows the switching transistors to operate at half the input voltage, more than halving switching losses, TI energy systems engineer Pradeep Shenoy told Electronics Weekly. ...

Rohm feeds NXP MCUs with multi-output power chip

Rohm BD71815GW

Rohm has announced a multi-function power chip (PMIC) for NXP’s i.MX 7Solo and i.MX 7Dual processors. Called BD71815GW, it has five low-quiescent current buck regulators, seven LDOs, a JEITA-compliant 1S charger, a fuel gauge with Coulomb Counter, an LED driver and a real-time clock (RTC), alongside extensive monitoring and protection circuits. All possible processor power modes are supported, said Rohm, ...

Power converter puts 25W in square inch space

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CUI has added two open frame isolated DC-DC converters – the PRD15 and PRD25 series – with outputs of 15W and 25W respectively in one square inch of board space. The modules measure 27.90 x 24.40 x 8.10mm. The PRD15 series features a 4:1 input voltage range of 9-36 or 18-75Vdc, while the PRD25 series provides a 2:1 input voltage ...

Infineon Cool

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Infineon is shipping its CoolMOS C7 Gold 650 V in a TO-Leadless package. The C7 Gold CoolMOS technology comes with 4pin Kelvin Source capability and improved thermal properties of the TO-Leadless package. This enables a viable SMD solution for high current topologies such as Power Factor Correction (PFC) up to 3 kW. The Infineon C7 Gold technology has the world’s ...

PCIM: Toshiba super-junction mosfets cut resistance and noise

Toshiba DTMOS V mosfets

Toshiba has announced its next generation of super-junction deep trench semiconductor technology for power mosfets. Based on the DTMOS V process, devices are claimed to operate with lower EMI noise and with reduced on-resistance compared to previous DTMOS IV mosfets. As with DTMOS IV, V is is based on a single epitaxial process involving deep trench etching followed by p-type ...

PCIM: Linear ideal three-phase rectifier cuts losses

LT4320 DC2465 three phase rectifier

Linear Technology has created at three-phase ideal rectifier reference design. Using three of its LT4320 ideal diode bridge controllers and six n-channel mosfets, it is demonstrated on the DC2465 evaluation board. Power dissipation drops from roughly 1.2x the output current to 0.04x the output current if the correct mosfets are chosen, and cuts voltage loss to a few dozen millivolts. “This enables the ...

650V fast body diode mosfets for soft switching

Vishay 650V fast body diode mosfet

Vishay has extended its fast body diode n-channel mosfet range from 600V to 650V with the EF Series. “They provide additional voltage headroom for industrial, telecom, and renewable energy applications when desired,” said the firm. Built on E Series super-junction technology, they feature 10x lower reverse recovery charge (Qrr) than standard mosfets, which allows the devices to block the full ...

TI’s 65V buck converter draws only 10μA

LM5165x

Texas Instruments is claiming industry’s lowest quiescent current for a 3-65V buck converter. Optimised for light-load efficiency in factory automation and automotive applications, it can draw as little as 10.5μA, as well as delivering 150mA. There are two versions of the buck converter: LM5165 for industrial and LM5165-Q1 for AEC-Q100 automotive. Both work with junctions up to 150ºC. “The 3 to 65V operating range ...

PCIM: Wolfspeed to show 20kW SiC dc-dc converter

Cree SiC mosfets

Wolfspeed – Cree’s silicon carbide power transistor division – is to reveal just how small it can make a 20kW dc-dc converter at PCIM in Nurnberg. Alongside this will be an all-SiC 62mm half-bridge power module and gate driver combination (see below) with three-phase evaluation kit, and an on-line simulation tool for SiC power supplies called SpeedFit. And there will be ...

Recom’s dc-dc converters power SiC output stages

Recom RKZ-xx2005D

Recom has introduced two 2W dc-dc converter series designed to power SiC mosfets. “One of the challenges of driving SiC mosfets is the high frequency and high voltage at which they are switched,” said Recom. “High potentials between the control and power side of an application can wear down isolation barriers, eventually causing them to fail.” For a strong barrier, RxxP22005D ...