Power

Power electronics is a key element in the world of electronic design and engineering and electronic engineers need to have a thorough understanding of this area if they’re going to create successful products.

In this section, New Electronics keeps designers up to date with the latest developments in the power electronics market – everything from DC/DC converters to IGBTs to battery technology. In fact, New Electronics covers any power product that can go on a PCB.

Simplifying LED lighting control with triac and quadrac design

Designing an AC circuit for controlling LED light output is said to be simple when using triac designs, such as the Littelfuse Q6008LH1LED or Q6012LH1LED Series, because the only components required are a firing/triggering capacitor, a potentiometer, and a voltage breakover triggering device.

1W DC/DC converter is 34% smaller

Murata has announced the MTC1 series of 1W regulated single output DC/DC converters. Murata claims the MTC1 Series occupies 34% less PCB area that competing parts and can operate up to 105°C.

DC gate driver reduces board space by 40%

Texas Instruments has introduced an integrated gate driver that offers adjustable gate drive settings with the flexibility to drive a range of external FETs, supporting multiple motors, speeds or varying loads. The DRV8701 enables designers to scale their platforms using a single gate driver across various brushed DC motor models in equipment such as white goods, household appliances, robotics, home automation, power tools, and industrial pumps and valves.

Quick charge and discharge supercapacitors

Jamicon has introduced the DA series of supercapacitors, available in the UK from specialist components distributor Components Bureau. Bridging the gap between capacitors and batteries, these electric double layer capacitors (EDLCs) are suitable for quick charge and discharge applications.

AC/DC supply provides 95% efficiency

XP Power has announced the EPL225 series of efficient, open frame AC/DC power supplies suited for industrial, IT and medical applications. The series comprises seven single-output models that offer a range of standard output voltages from 12 to 48V DC with an output power of 225W.

IC for electronic throttle control

Toshiba has launched the TB9051FTG; a motor driver IC for DC brushed motors. While primarily targeted at vehicle engine applications, such as electronic throttle and valve control, it is also suitable for control of on-board systems operating at up to 5A, such as control of wing mirrors and locks for car boots.

Low power, high-speed IC-photocoupler

Toshiba has launched a photocoupler that is claimed to combine communication at 15Mbit/s with low power consumption. The TLP2761 has been designed for use in applications such as inverters, servo amplifiers, photovoltaic inverters, FA networks and I/O interfaces.

Fast charging and system back up

Linear's LTC3110 is a 2A bidirectional buck-boost DC/DC regulator with capacitor charger and balancer. Its 0.1V to 5.5V capacitor/battery voltage and 1.8 to 5.25V system backup voltage ranges suit it to a variety of backup applications using supercapacitors or batteries, including servers, RAID systems and RF systems.

Resettable e-fuse for consumer applications

Diodes Inc has introduced the NIS5135, a self-protected resettable electronic fuse designed to enhance system reliability against shutdown and catastrophic failures. The fuse is suited to plug and play consumer applications, such as hard disk and solid state drives, printers, and set-top boxes.

MOSFETs enhance buck converter power density

Diodes has introduced the DMC1028UFDB complementary MOSFET pair. Aimed at increasing the power density of DC/DC converters, the MOSFET pair integrates an N-channel and a P-channel MOSFET in a DFN2020 package. The design is customised for point-of-load converters that step down from 3.3V to 1V for core voltage supply to ASICs.

Industry's smallest 20A power module

Exar has introduced the XR79120, a 20A single output, synchronous step-down power module in a 12 x 14 x 4mm package. The XR79120 is claimed to offer greater than 93% peak efficiency and leverages constant on-time (COT) control architecture across a 4.5 to 22 VIN range. This allows single supply operation from industry standard 5, 12 and 19.6V rails.

Converters offer wide input range in a compact package

XP Power has launched the ITQ series of 6W DC/DC converters. Packaged in a compact SIP 8-pin format, with a footprint of 21.9 x 11.1 x 9.2mm, the ITQ series takes up less board space giving designers more room to add features or the ability to reduce end product size.

High efficiency in hard switching applications

Infineon has extended its medium voltage MOSFET portfolio with Optimise 300 V, which is said to enable energy efficient solutions in applications such as telecom systems, uninterruptible power supplies (UPS), motor control, industrial power supplies and DC/AC inverters.

Buck converter raises portable efficiency

Diodes claims that its AP3403 step-down DC/DC converter achieves typical efficiencies greater than 95%, helping to extend the battery life of low voltage portable products. The synchronous PWM device drives a load of up to 600mA, with efficiency maintained through a configuration of external resistor, capacitor and inductor components.

Efficient PMIC halves input voltage

Dialog has released the DA9312, a power management IC suitable for applications supplied directly from dual cell (2S) stacked lithium battery packs or from input voltages range from 5.5 to 10.5V. It integrates three independent power supplies: two DC/DC buck regulators, each delivering up to 5A; and what is said to be the industry's first inductorless 10A power converter.

Power converters for white goods

Dialog Semiconductor has announced the iW1818 and iW1830 AccuSwitch pulse width modulation (PWM) controllers. These power control circuits use Dialog's PrimAccurate primary-side control to eliminate the need for optocouplers in white goods, said to be the weakest link in achieving high reliability and long operating lifetime for appliances, such as dishwashers, refrigerators, cooking ranges and microwaves.

Ultra-low power SRAM IP

SureCore's latest ultra-low power SRAM IP technology is said to extend battery life and reduce both static and dynamic power through its patented suite of circuit design techniques. This is crucial for developers of wearable electronics and IoT applications.

Buck controller eliminates intermediate power conversion

The ISL8117, from Intersil, is a 60V synchronous step-down PWM buck controller that can bypass the intermediate step-down conversion stage traditionally employed in industrial applications. Its low duty cycle (40ns minimum on time) enables the direct step-down conversion from 48V to a 1V point-of-load. This makes it possible for designers to reduce system complexity and solution cost in industrial, factory automation, medical and communications infrastructure applications.

HV-IPD for sine-wave motor control

Toshiba has launched the TPD4204F, a high voltage intelligent power device that enables the sine-wave control of brushless DC electric motors. The device can be used in a range of low power industrial fans and pumps, as well as in white goods such as washing machines, dishwashers and fan units.

Power management chipset helps optimise dead time

Texas Instruments has introduced a power management chipset with intelligent digital control and a body-diode sensing feature to optimise secondary-side synchronous rectification in next-generation AC/DC and isolated DC/DC power supplies.

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