Electronic Design's Power Products of the Week (1/21-1/27)

The IQXO-610 is a 32.768 kHz clock oscillator designed by IQD for ultra low current draw down to 1 µA typical with no load at 3.3 V and 1.5 μA typical at 5 V no load. The product boosts stability performance due to compensation of the frequency and temperature characteristics of the 32.768 kHz crystal, allowing stabilities down to ±20 ppm over an operating temperature range of 0° to 50°C and ±50 ppm over -40°C to +85°C.

Packaged in a 3.2 x 1.5 x 0.9 mm hermetically seam-sealed package with a metal lid, the CMOS-based clock oscillator is capable of driving up to 15 pF loads and can operate from 2.0 V to 5.5 V. An enable/ disable function is available on Pin 1 of the device with a current draw in disable mode of 0.6 µA. Typical applications for the IQXO-610 clock oscillator include real time clocks, IoT applications, precision timing devices, event data recorders, smart meters and wearable devices.

Allegro MicroSystems’ three-phase MOSFET driver IC, the A4919, features an integrated low dropout regulator supplying 5 V or 3.3 V. The IC can be controlled with block (trapezoidal), sinusoidal, or vector commutation when interfaced with a microprocessor. Designed as a direct control gate driver for both the commercial and industrial markets, the chip provides LDO for peripherals or microprocessor.

A charge pump regulator provides full (>10 V) gate drive at power supply voltages down to 7 V, and allows the IC to operate with reduced gate drive at power supply voltages down to 5.5 V. One logic-level input is provided for each of the six power MOSFETs in the three-phase bridge, allowing motors to be driven with any commutation scheme defined by an external controller.

The A4919 driver IC is supplied in a 28-pin TSSOP power package (LP) and a 28-terminal 5 × 5 × 0.90 mm (QFN) both with an exposed pad for enhanced thermal performance. Product variants include a 5.0 V LDO, a 3.3 V LDO, and an option without LDO.

Emerson is announcing a major upgrade to its SolaHD SDN 40-24-100C DIN rail power supply (40 A) that doubles the number of terminals available for improved connectivity to power multiple devices, while also stepping up its heat rating to expand the number of types of hazardous environments where the power supply can be deployed.

First available in 2014, the DIN rail has been redesigned by doubling its 2 terminals to 4, to connect more than one load to the power supply while maintaining its small footprint. The product is now capable of powering twice the large dc loads than its predecessor on a standard, single-phase ac circuit, allowing additional new equipment that can be powered from an existing structure with little or no retrofitting requirements.

Another upgrade is that its T-code temperature specification has been enhanced from "T3" (<200°C) to the same "T4" (<135°C) rating as other SolaHD single-phase SDN-C power supplies. SolaHD SDN 40-24-100C power supplies come equipped with standard screw terminal connections and a rugged, industrial-grade metal outer case.

Specifically developed by Powercast for the consumer market, the new smaller PowerSpot transmitter is FCC- and ISED-approved and is designed to work in the far field (up to 80 feet) for over-the-air charging of multiple devices. Creating a coverage area like Wi-Fi, the transmitter automatically charges enabled devices when within range, using the 915 MHz ISM band to send RF energy to a receiver chip embedded in a device.

Up to 30 devices left in the zone overnight (without the need for direct line of sight) are expected to charge by morning sharing a 3 W power output. Power-hungry devices like game controllers or smart watches charge best up to two feet away, keyboards and mice up to six feet, TV remotes and smart cards up to 10 feet, and low-power devices like automation sensors up to 80 feet away.

A PowerSpot subassembly is available for integration into products such as appliances, gaming systems, computer monitors or vehicle dashboards. Production units are expected in Q3 2018 for about $100 from Arrow and Mouser.

New Yorker Electronics is offering a new line of products based on Exxelia Magnetics’ Chameleon Concept Magnetics (CCM) technology. Adaptable to most every need, even the harshest environments, the products are usable as either inductors or transformers, depending on inductor ranges, the series of products offers five different sizes, allowing optimized component design in pick-and-place SMD packaging. Through-hole packages are also available upon request. The series offers various pin options, from 2×6 pins for the smallest package, up to 2×10. The monolithic design’s high mechanical performance is in accordance with MIL-STD-202 (methods 213 and 204).

The transformers and inductors can operate with a -55°C minimal temperature and a 140°C standard thermal grade. Thermal resistance is purported to be 30% lower than standard industrial components. The epoxy molding protecting the winding provides a lower temperature gradient and improves heat dissipation. Each unit is tested with a dielectric withstanding strength of 1,500 Vac and component materials meet UL 94-V0 rating. Applications include aeronautic and space; common mode, transformers and filtering chokes.

Passive Plus is now offering extended voltage with their EIA Low ESR 0201N and 0402N capacitors. With extended voltages of 50 V and 250 V, respectively, the capacitors feature 100% RoHS case sizes and exhibit low ESR/ESL, low noise, high self-resonance and ultra-stable performance-over-temperature.

The 0201N series capacitors are sized at .020" x.010" and feature a 0.1 – 100 pF value range, 25 V WVDC and 50 V extended WVDC. The 0402N series, sized at .040" x .020", has a 0.1 – 33 pF value range, 50 V WVDC and 250 V extended WVDC. An additional 0603N series is 060" x .030" with a 0.1 – 100 pF value range and 250 V WVDC. In all three models Q = 2,000 min. @ 1 MHz and TC = 0 +/- 30 PPM/°C (-55°C to +175°C). Engineering Design Kits are also available for the 0201N, 0402N and 0603N series.

Vincotech is offering two new neutral-point-clamped flowNPC 2 power modules featuring the latest IGBT technology for three-phase solar, UPS and ESS applications. Engineered to address low weight and small size while maximizing power density and minimizing losses, the products are capable of delivering switching frequencies up to 50 kHz even without SiC technology. When Si components are used, the best performance starts above 8 to 10 kHz. Breakdown voltage in both modules is 1,200 V and a convex-shaped Cu baseplate helps provide superior thermal contact.

Rated for 650 V / 200 A and 650 V / 300 A, the power modules are packaged in low-inductive, 13 mm flow 2 housing and available with Press-fit and solder pins. Samples of the ultra-efficient 200 A and 300 A flowNPC 2s may be sourced on demand from distributors Pik Power and RichardsonRFPD.

The Power by Linear LTC7821 from Analog Devices is a hybrid step-down synchronous controller that merges a switched capacitor circuit with a synchronous step-down controller. Benefits such as a 3X higher switching frequency, low EMI and reduced MOSFET stress target the device for non-isolated intermediate bus applications in power distribution, datacom and 48 V automotive systems.

Operating over 10 V to 72 V, the controller can produce an output voltage from 0.9 V to 33.5 V with currents in multiple 10s of amps. In typical 48 V to 12 V / 20 A applications, an efficiency of 97% is attainable with switching set at 500 kHz. External MOSFETs switch at a fixed frequency programmable from 200 kHz to 1.5 MHz. N-channel 1 Ω MOSFET gate drivers allow multiple LTC7821’s to operate in parallel, multiphase configuration. An EXTVCC pin enables powering from the converter’s lower voltage output or other available source up to 40 V.

The LTC7821 is available now with pricing starting at $5.20 each/1,000 in 5 x 5 mm QFN-32 packaging. Extended and industrial temperature versions are available from -40°C to 125°C.