Power Supplies

To handle inputs from 43 to 160Vdc, and outputs of 50, 100 or 150W, TDK has added quarter brick dc-dc converters to its CN-B110 series, which previously only had 200 and 300W half-brick models. “The converters are compatible with 72Vdc or 110Vdc nominal railway systems for applications such as rail rolling stock and trackside equipment,” according to the company. Output choice ...

For the gate drivers of high-power IGBTs, mosfets, SiC mosfets and GaN hemts, Infineon has introduced an isolated power supply IC that can generate asymmetric output voltage rails. Each member of the 2EP1xxR family, as it will be known, has a full bridge of mosfets at its output for driving both ends of a transformer primary, whose secondary can be ...

Murata has announced a 600W open-frame ac-dc power supply for medical and industrial use. PQC600 is less than 1U in height, although does need room for forced cooling if it is to reach full power. Certification is to IEC 60601-1 edition 3 medical safety, which includes 2 MOPP (means of patient protection) from primary to secondary, 1 MOPP from the ...

Lumissil Microsystems is aiming at adaptive beam vehicle headlights with controller for dozens of power LEDs. It is for ‘matrix’ headlights, that have an array of close-packed power LEDs and projection optics that focus that any pattern on the array forwards from the vehicle – allowing headlights to produce arbitrary beam patterns – usually controlled by an on-board forward facing ...

Nexperia has introduced a 110V 4A half-bridge gate driver IC. “NGD4300 has been designed for use with dc-dc converters in consumer devices, servers and telecommunications equipment as well as for micro-inverters used in various industrial applications,” according to the company, which is also producing an automotive-qualified version: NGD4300-Q100 for power steering, for example. 4A is the peak sourcing current, and ...

ST’s STGAP3S family of gate drivers for SiC and IGBT power switches combines ST’s latest galvanic isolation technology with optimised desaturation protection and flexible Miller-clamp architecture. Featuring reinforced capacitive galvanic isolation between the gate-driving channel and the low-voltage control and interface circuitry, the STGAP3S withstands 9.6kV transient isolation voltage (VIOTM) with 200V/ns common-mode transient immunity (CMTI). Its isolation enhances reliability in motor ...

Flex Power Modules is aiming at data centres with a 1kW dc-dc converter in a 23.4 x 17.8 x 7.65mm surface-mount package, leading the company to claim 900W/cm3 and 15kW/in3 at its peak 3kW load. Being a non-isolated and un-regulated contributes to the small size of the converter, called BMR316, as does a peak efficiency of 97.7% (54Vin, 40A/50% load). ...

Vishay has introduced an automotive-rated series of positive temperature coefficient (PTC) in-rush current thermistors that can absorb up to 340J, designed for dc link charging and energy discharge circuits. Called PTCEL67R, they are through-hole disc devices, available with 25°C resistances (R25 values) from 150Ω to 1.5kΩ and handling up to 1.2kVdc. They can handle 180J at 85°C and 130J at ...

Toshiba has got together with development board maker Mikroe to create a platform for its TB9M003FG automotive three-phase motor control and driver IC. AEC-Q100 Grade 0 qualified, the IC has a 32bit 40MHz Arm Cortex-M0 CPU and a vector co-processor  for sensorless vector control, as well as gate-drivers to control external n-channel mosfets. AEC-Q101 qualified mosfets are included on the ...

Mouser has teamed up with Analog Devices to create an e-book about power circuits. A brief affair (~22 pages), ‘Powering the future: Advanced power solutions for efficiency and robustness’ is a like a series of ADI application briefs, each with at least a few nuggets that are worth absorbing. “ADI has a long history in the field of power management ...