DC-DC

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. ...

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 ...

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 ...

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, ...

At PCIM in Nuremberg this week, Texas Instruments announced an automotive-qualified LLC controller for light electric vehicle charging, and demonstrated it in a three-stage ac-dc battery charger for electric two-wheelers. (LLC is an inductor-inductor-capacitor topology, see diagram) “But despite the benefits that the LLC topology can offer, including minimal standby power and low audible noise, electric vehicle manufacturers have been ...

At PCIM in Nuremberg today, Power Integrations revealed five 800V automotive power supply reference designs for its 1,700V InnoSwitch3-AQ flyback dc-dc converter IC: RDK-994Q – 35W 40 to 1kVdc input, 24V output, low-profile traction inverter gate-drive or emergency PSU RDK-1039Q – 18W planar transformer traction inverter gate driver or emergency PSU (pictured) RDK-1054Q – 120W planar transformer PSU to eliminate ...

For hard-switched power topologies, Infineon is planning a 100V GaN transistors with a integrated Schottky diode. “Due to the lack of body diode in hard-switching applications, GaN-based topologies may incur higher power losses due to the larger effective body diode voltage of GaN devices,” according to the company, which explained: “GaN transistor reverse conduction voltage is dependent on the threshold ...

Vicor is aiming at 48V to 12V conversion with a family of surface-mount dc-dc converter modules ranging from 750W to 2kW. “Power delivery networks are making a decisive shift from 12V to 48V architectures to take advantage of higher efficiency,” according to the company. “The benefits of using 48V have been illustrated in high-performance computing, automotive and in many other ...

Following its acquisition or Leco, Recom has launched a series of DIN rail power supplies for three-phase and dc input busses. Two-phase ac operation is also possible. Called the RACPRO1 range, it includes five parts: 240W (24Vout), 480W (24 or 48Vout) or 960W (24 or 48Vout), which are 43mm, 52mm or 80mm wide respectively. Update: The company introduced matching electronic ...

Infineon has released a family of H-bridge driver ICs for small brushed dc motors in vehicles, that include hardware for ISO26262-level functional safety. Called the BTM90xx family, they are intended to work over 7 to 18V, but have some function at 4.5V, and can survive up to 40V. There are four parts: BTM9010EP ±3.4A continuous, PWM input BTM9011EP ±3.4A continuous, ...