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The latest Electronics Weekly product news on power supplies.

Mosfet opto-relays switch more than ever

Omron G3VM mosfet relay

Omron has announced mosfet opto-relays that can switch 3.3Aac or 6.6Adc, giving them the highest-ever current carrying capacity, said the firm. Mosfet relays use light to isolate the primary side, which is an LED, from a pair of mosfets at the output. They are a conveniend way to connect microcontrollers to unruly loads. With their sources tied together, the mosfets ...

First 100V battery pack controller claims TI

TI BQ76200

Texas Instruments is claiming a first for a 100V high-side battery protection chip. Bq76200 drives high-side n-channel charge and discharge FETs in batteries for drones, power tools and e-bikes. “Compared to typical 50V low-side FET driver solutions, the 100V high-side FET driver provides greater protection against possible inductive transient events in motor-driven applications. “Bq76200 also helps maintain constant battery monitoring and ...

Infineon launches SupIRBuck regulators

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Today Infineon introduced the PMBus SupIRBuck voltage regulator family of DC-DC regulators with I²C/PMBus interface. The integrated PWM controller, MOSFETs and Bootstrap diode make them suitable For low output voltage and high current applications. Due to the programmable digital interface with remote testing using telemetry, customers will benefit from reduced design and test times. The SupIRBuck voltage regulators are for applications ...

IGBTs optimised for welding

Vishay INT-A-PAK

Vishay has introduced IGBT power modules specifically for TIG welding machines. The devices can work up to 1kHz, 600V and 100-400A. There are three half-bridges and on single IGBT, and losses are down on its previous offerings through using ‘Trench PT’ construction: collector-emitter voltages are 1.1-1.3V and turn-off switching energy is 11-45mJ – said to be 50% lower than the previous-generation. ...

Stepper drivers self-tune motor parameters for life

TI microstepper

There is no need to manually tune stepper motor drives, claimed Texas Instruments, as it introduced two 24V stepper motor driver chips with its patented ‘AutoTune’ technology. “AutoTune technology on the DRV8880 and DRV8881 eliminates the iterative process of manual tuning,” said TI. “On-chip intelligence dynamically monitors the motor’s performance under varied conditions over its life-time and adjusts decay settings appropriately.” – Despite ...

Power Integrations ac-dc converter delivers constant power

Power Int innoswitchCP

Power Integrations has developed a version of its InnoSwitch family of off-line power converter chips for constant power outputs. Called Innoswitch-CP, the converters are CV/CC fly-back switching ICs, that unsusually have a constant power output limit which, “when paired with an adaptive-voltage protocol such as Qualcomm Quick Charge 3.0 or USB-PD, permits smart mobile device makers to optimise charging time ...

Vishay aims at notebooks with mosfet power stages

Vishay SiC530 app diag

Vishay has introduced 30 and 40A mosfet power stages in 4.5×3.5 and 5x5mm packages respectively. Intended for notebook PCs, they accept PWM inputs and combine switching mosfets, gate drivers and a bootstrap Schottky diode. On-board high and low-side mosfets are GenIV TrenchFETs, the driver IC is supports 5V tri-state PWM logic, and 45 % footprint saving is claimed over discrete solutions. “The devices’ high power density ...

Vicor completes slim-line mains PSU front-end

Vicor Via front end filter

Vicor has announced the long-awaited input rectifier-filter modules for its slim-line ‘PFM’ brand ac-dc power converters. Released last May, the converters come in a remarkably slim (9 x 36mm cross section) package (dubbed ‘VIA’) that can be bolted along the inside of a 1U chassis rail – sitting in space that it often unused. However, the firm left users to ...

Single 80W PoL covers 3.5 to 14Vin

TDK iBH PoL

TDK is offering a single 80W point-of-load converter which can replace 5V and 12V input types. Its input range is 3.5 to 14V, and output is 80W across 0.7 to 5.5V. Called the iBH series, they measure 20.3 x 11.4 x 9.9mm and weighing 6g, while delivering 66% more current than its similarly sized iBF series. Efficiencies is up to 96%, ...

IoT power chip gets best from coin cell

MAX14720

Maxim has directed its considerable low-power expertise at IoT applications with a PSU chip designed for a coin cell. “MAX14720 is ideal for non-rechargeable battery – coin cell or dual alkaline – applications where size and energy efficiency are critical,” said the firm. “In addition, an electronic battery seal extends shelf life by effectively disconnecting the battery prior to initial ...