Feed aggregator

At Photonics West 2025 in Santa Clara, CA, USA (25–30 January), chemical vapor deposition (CVD)-based synthetic diamond materials firm Element Six of Oxford, UK (E6, part of the De Beers Group) is launching an innovative Cu-diamond product, a copper-plated diamond composite material that has high thermal and electrical conductivity. Designed to address the increasingly critical thermal management challenges in advanced semiconductor devices, the cost-effective solution is said to enable greater performance and reliability for applications such as AI, high-performance computing (HPC), and gallium arsenide (GaN) RF devices...

SemiQ Inc of Lake Forest, CA, USA — which designs, develops and manufactures silicon carbide (SiC) power semiconductors and 150mm SiC epitaxial wafers for high-voltage applications — has announced a family of 1700V SiC MOSFETs designed to meet the needs of medium-voltage high-power conversion applications, such as photovoltaic and wind inverters, energy storage, electric vehicle (EV) and road-side charging, uninterruptable power supplies, and induction heating/welding...

The VNH9030AQ integrated full-bridge DC motor driver handles diverse automotive uses including functional-safety applications. As well as integrating advanced diagnostics, the driver has a dedicated pin for real-time output status that saves external circuitry and slims the bill of materials.

With RDS(on) of 30mΩ per leg, the VNH9030AQ efficiently handles mid- and low-power DC motor driven applications such as door-control modules, washer pumps, powered lift gates, powered trunks, and seat adjusters.

Contributing to the driver’s high overall efficiency, and saving external components, integrated non-dissipative current-sense circuitry monitors the current flowing through the device to distinguish each motor phase. The standby power consumption is very low over the full operating temperature range, easing use in zonal controller platforms.

The VNH9030AQ integrates the high-side and low-side MOSFETs with gate drivers, diagnostics, and protection against overvoltage transients, undervoltage, short-circuit conditions, and cross conduction. Flexibility to configure the MOSFETs either in parallel or in series allows use in systems involving multiple motors or to meet other specific requirements.

The new driver is part of a family of devices that leverage ST’s latest VIPower M09 technology, which permits efficient, monolithic integration of power and logic circuitry. All products feature an innovative 6mm x 6mm thermally enhanced triple-pad QFN package designed for optimal underside cooling and share a common pinout to ease layout and software reuse.

The post VIPower full bridge with real-time diagnostics reduces complexity and cost of automotive drives appeared first on ELE Times.

submitted by /u/Canadian_Rubles [link] [comments]

✅ Оголошується конкурс на заміщення посад kpi вт, 01/21/2025 - 20:00

The concluding post in a series; here’s part 1 (covering the Energizer PowerSource Pro Battery Generator) and part 2 (discussing its companion 200W portable solar panel)…

Eagle-eyed readers may have already noticed, within the listing for the Energizer Solar Bundle I bought at the beginning of September (and returned shortly thereafter), the following prose:

Pick up another 200-watt solar panel on SideDeal to max out the solar capacity of 400W (but do take note of these instructions)

That I did, for an incremental $179.99. It was (past tense usage because I ended up returning it, too) a “Duracell Heavy Duty 200-Watt Briefcase Solar Panel”, and it also came from Battery Biz. Here are some “stock” images:

Along with a bullet list of specs:

• Brand: Duracell
• Material: ‎Monocrystalline Silicon [editor note: claimed conversion efficiency of 22%]
• Dimensions (unfolded): ‎55.2 x 36.5 x 1.3 in
• Item Weight: ‎36.2 lbs
• Maximum Power Point Voltage: ‎18.6 V
• Maximum Power Point Current: 10.8 V
• Open Circuit Voltage: 22.8 V
• Short Circuit Current: 11.2 A
• Maximum System Voltage (Vmax): 1000VDC
• Normal Operating Cell Temperature (NOCT): 45±2°C
• Temperature Range (°C): -40°C~+85°C
• Power Tolerance: ±5%
• Application Class: Class A
• Included Components: ‎Panel
• Maximum Power: ‎200 Watts
• Manufacturer: ‎Duracell

When it arrived, the outer packaging was…err…already breached:

Thankfully, the box inside was still intact:

although, as you may have already noticed, the product image on the front didn’t match the “stock” shots, which left me a bit disconcerted before I even opened it.

Here’s the box backside:

Take the “unfolded” dimensions listed in the earlier bullet list, divide the largest by two, and you end up with an approximation of the data shown in this closeup image, which was reassuring:

Open the box, pull out the hefty contents (the promotional prose claims that you can “Experience the convenience of home no matter where you are with our lightweight and foldable solar panel” (foldable = yes, lightweight = not), and the “Zippered Carrying Case with Handle” conceptualized in the previous photo’s graphic is the first thing you’ll come across:

Chug a can of spinach, unzip the case and huff, puff and pull the bulky panel out:

Now undo the clips on the “handle” edge and unfold it:

Like I said, it looks nothing like the “stock” photos, although it ended up being fully functional.

I only realized after returning it that I’d neglected to snap a photo of the backside, so another closeup of the box will have to do:

The cable coming out of the back of the panel terminates in a pair of MC4 connectors:

The also-included adapter cable converts the MC4s into an Anderson PowerPole PP15-45 connector for use with the Energizer PowerSource Pro Battery Generator (along with other Anderson-compatible battery-based products, of course, including Duracell’s own):

Its measured open-circuit output voltage closely approximated the earlier-listed max spec:

and it did charge up the PowerSource Pro reasonably speedily in direct sunlight:

Had I been able to as-intended combine it with the Energizer solar panel, of course, the combo likely would have been speedier still from a charging-rate standpoint. But from my earlier writeup, you already know about the connector woes that prevented such an arrangement and resultant experiment. And since the other gear I’d bought ended up being subpar and sent back to the retailer, I had no other use for this panel, either, so it got returned for full refund, too.

That all said, for the remainder of this writeup I’d like to delve a bit deeper into the suggested dual-panel configuration linked to within the initial Meh teaser and replicated here:

To a first conceptual approximation, you can think of two (or more) solar panels as batteries. Connect them in series and you boost the effective output voltage. Tether them in parallel, conversely, and the aggregate output current goes up. That said, as my research has enlightened me, they also exhibit important differences from batteries in both possible configurations. These variances derive from two fundamental keywords: batteries (ironically) and shade (i.e., “dark”).

Rarely if ever is the solar illumination of a single panel uniform, far from across multiple panels. This inconsistency is due to various factors, such as imperfect orientation versus the sun’s position of the moment in the sky, and the aforementioned shading caused by clouds, trees, and other partially-to-fully obscuring intermediate objects. For series-interconnected panels, illumination inconsistency means that the effective current you’ll be able to squeeze out of a multi-panel configuration is constrained by the least-illuminated panel in the chain. And you’ll of course also want to make sure that the aggregate voltage generated by the multi-panel series arrangement in full illumination doesn’t exceed the max input voltage of whatever it’s driving.

What about multi-panel parallel hookups such as the one recommended in the Energizer documentation? To tether them together requires a combiner cable such as this one I’d bought:

Minimally, you’ll want to ensure that the output voltages of both panels match (for reasons you’ll soon understand) and, this time, that the aggregate current generated by the multi-panel parallel arrangement in full illumination won’t exceed the max input current of whatever it’s driving. “What it’s driving” in my particular case was the Energizer PowerSource Pro Battery Generator, supposedly. Which is where the words “shade” and “battery” fully come to the fore.

Assume first that the combiner cable simply merges the panels’ respective positive and negative feeds, with no added intermediary electronics between them and the electrons’ intended destination. What happens, first, if all the parallel-connected panels are in shade (or to my earlier “dark” wording surrogate, it’s nighttime)? If the generator is already charged up, its battery pack’s voltage potential will be higher than that of the panels themselves, resulting in possible reverse current flow from the generator to the panels. Further, what happens if there’s an illumination discrepancy between the panels? Here again there’ll be a voltage potential differential, this time between them. And so, in this case, even if they’re still charging up the generator’s batteries as intended, there’ll also be charging-rate-inefficient (not to mention potentially damaging; keep reading) current flow from one panel to the other.

The result, described in this crowded diagram from the same combiner-cable listing on Amazon:

is what’s commonly referred to as a “hotspot” on one or all panels. Whether or not it negatively impacts panel operating lifetime is, judging from the online discussions I’ve auditioned, a topic of no shortage of debate, although I suspect that at least some folks who are skeptical are also naïve…which leads to my next point: how do you prevent (or at least minimize) reverse current flow back to one or both panels? With high power-tolerant diodes, I’ll postulate.

Those folks who think you can direct-connect multiple panels in parallel with nothing but wire? What I suspect they don’t realize is that there are probably reverse current-suppressing diodes already in the panels, minimally one per but often also multiple (since each panel, particularly for large-area models, is comprised of multiple sub-panels stitched together within the common frame). The perhaps-already-obvious downside of this approach is that there’s a forward-bias voltage drop across each diode, which runs counter to the aspiration of pushing as much charge power as possible to the destination battery pack. To that point, I suspect this is precisely what this Amazon reviewer is experiencing (also check out the video at the source link):

So I can draw about 86 to 92 watts to my Jackery with the cable from the solar panel but as soon as I plug in the splitter, it drops down to about 60-70 watts. When I plug in both 100 watt solar panels, I get about 120-130 watts. So the splitter somehow loses power when hooked up.

If you look closely at the earlier “crowded diagram” you can see a blurry image of what the combiner cable’s circuitry supposedly looks like inside:

Prior to starting this writeup, I’d returned the original combiner cable I bought, since due to my in-parallel return of the Duracell and Energizer devices, I no longer needed the cable, either. But I’ve just re-bought one, to satisfy my own “what’s inside” research-induced curiosity, which I’ll share with you in a teardown to come. Until then, I welcome your thoughts in the comments!

—Brian Dipert is the Editor-in-Chief of the Edge AI and Vision Alliance, and a Senior Analyst at BDTI and Editor-in-Chief of InsideDSP, the company’s online newsletter.

 Related Content

• The Energizer 200W portable solar panel: A solid offering, save for a connector too fragile
• Energizer’s PowerSource Pro Battery Generator: Not bad, but you can do better
• Experimenting with a modern solar cell
• Solar-mains hybrid lamp
• Beaming solar power to Earth: feasible or fantasy?

The post Multi-solar panel interconnections: Mind the electrons’ directions appeared first on EDN.

Efficient Power Conversion Corp (EPC) of El Segundo, CA, USA — which makes enhancement-mode gallium nitride on silicon (eGaN) power field-effect transistors (FETs) and integrated circuits for power management applications — has launched the EPC91104, a high-performance 3-phase brushless DC (BLDC) motor drive inverter reference design. The design is said to be suitable for powering compact, precision motors in humanoid robots, such as those used for wrist, finger and toe movements...

Lynred of Grenoble, France — which designs and makes infrared (IR) sensors for aerospace, defense and commercial applications — has launched Eyesential SW, its latest VGA-format shortwave infrared (SWIR) sensor for machine vision. Designed to offer the ideal cost-performance ratio for visible-like imaging to address specific performance needs in machine vision, Eyesential SW is said to have the performance and features sought by industry but at half the price of comparable IR sensors on the market. It also includes specific functions for spectroscopy applications, such as spectral line selection/deselection...

"Корпус та дискурс" на ФЛ kpi вт, 01/21/2025 - 16:53

submitted by /u/1Davide
[link] [comments]

Control MCUs increase performance and efficiency of motor control and power conversion systems by enabling real-time control of systems that need to respond to real-time events with minimal delay and low utilization. These MCUs are targeted at battery-powered applications with motors, large appliances, HVAC units, and power supplies for server farms and cloud computing centers.

Read full story at EDN’s sister publication, Planet Analog.

Related Content

• Advances in MCUs ease motor control
• Optimizing MCUs for EV Motor Control
• Microcontrollers for Motor Control Systems
• MCUs specializing in motor control, power conversion
• Designer’s Guide to High-Performance Motor Control for Robotics

The post Anatomy of MCUs for motor control appeared first on EDN.

Vertically integrated photonics product maker Thorlabs Inc of Newton, NJ, USA has acquired Praevium Research Inc of Goleta, CA, USA, which was founded by Dr Vijay Jayaraman in 2001 and develops high-speed tunable vertical-cavity surface-emitting lasers (VCSELs). The two firms have been working together since 2008, when Praevium became a member of Thorlabs’ Strategic Partner Program...