Power Supplies

With USB Power Delivery in mind, EPC has designed a 180W GaN dc-dc converter evaluation board. Its two-phase power section occupies only 24 x 24mm, using both sides of the board and ignoring input and output bulk capacitors. Called EPC91109 and intended to implement USB-PD 3.1, it delivers 12, 16 or 20V from an input range of 20 to 36V. ...

Renesas has introduced three 650V GaN power transistors, aimed at server power supplies and e-mobility chargers. “Designed for multi-kilowatt-class applications, these devices combine GaN technology with a silicon-compatible gate drive input,” according to the company. “Offered in TOLT, TO-247 and TOLL package options, the devices give engineers the flexibility to customize their thermal management and board design.” The result of ...

Rohm has designed a mosfet for high-current 48V hotswap controllers in data centres. RY7P250BM is a 100V device nominally rated at 300A and comes in an 8 x 8mm DFN8080 package. “In hot-swap circuits used to safely replace modules while servers remain powered on, mosfets are required that offer both wide safe operating area and low on-resistance to protect against ...

Microchip has introduced a 15W radiation-rated dc-dc converter for space use. Intended to be fed from a satallite’s 28V bus (22V to 42V, 50V abs max), SA15-5-5T has three isolated 5V 1A outputs that can be paralleled for more current or connected in series for higher voltages. Output ripple is <1%, and operation is over-55 to 125°C, with de-rating above ...

Wise Integration has released its GaN PFC (power factor correction) controller chip to production. WIW1101 is based on a 32bit MCU, said the company, and is specifically for totem pole PFCs operating in critical conduction mode (CrCM), switching at up to 2MHz and delivering between 100W and 1.5kW. Its proprietary internal algorithm “enables ZVS [zero voltage switching] across all power ...

Microchip has created a 78ps-resolution 20bit PWM timer block for a series of MCUs for GaN and SiC based dc-dc converters. There are 16 of them to implement 16 power rails, plus eight 16bit 1.25ns PWMs. The family, dsPIC33AK512MPS512, combines these PWMs with five of the company’s recent 12Bit 40Msample/s ADCs and backs them up with a 200MHz 32bit processing ...

STMicroelectronics is aiming at domestic induction hobs and microwaves with a 1.6kV IGBT in a long lead TO-247 package. “STGWA30IH160DF2 IGBT combines high thermal performance with efficiency in soft-switching topologies and easy paralleling,” claimed the company. Nominal current rating is 30A (120A pulsed), and the device works with its junction up to 175°C. Thermal resistance is 0.36°C/W junction-to-case, and 0.81°C/W for ...

Nanotec has introduced a driver for stepper and brush-less dc (BLDC) motors with sensor-less closed-loop and field-oriented control (FOC). Intended for steppers from NEMA 14 to NEMA 34 and BLDC motors up to NEMA 23 “its sensor-less closed-loop control provides precise management of torque and speed”, according to the company. A additional ‘safe torque off’ (STO) function is in the ...

Torex Semiconductor has created a nano-power dc-dc converter that can occupy only 7.7 x 3.1mm with all external capacitors – the necessary inductor is inside the device package. Called XCL108 and drawing 400nA quiescent current, it is a boost converter that will operate from inputs between 650mV and 5.5V – starting from anything above 1.6V. The device is a series, ...

Not known for making microcontrollers, Allegro Microsystems has picked a 40MHz Arm Cortex-M4 as the processing heart of a series of stand-alone three-phase automotive brushless motor driver ICs for rails up to 90V. The parts are: 60V motor, 5.0V I/O, 252kbyte flash A89211GEVSR 60V motor, 3.3V I/O, 128kbyte flash A89211GEVSR-A 90V motor, 5.0V I/O,  252kbyte flash A89212GEVSR 90V motor, 3.3V ...