The TPS546C23 devices are PMBus 1.3 Compliant, non-isolated DC-DC converters with integrated FETs, capable of high-frequency operation and 35-A current output from a 5-mm × 7-mm package. Two TPS546C23 devices can be paralleled together to provide up to 70-A load. Current sensing is realized by sampling a small portion of the power stage current and independent on the device temperature. High-frequency, low-loss switching, provided by an integrated NexFET power stage and optimized drivers, allows for very high-density power solutions. The PMBus interface enables the AVS functions through VOUT_COMMAND, flexible converter configuration, as well as key parameters monitoring including output voltage, current, and internal die temperature. Response to fault conditions can be set to either restart, latch-off or ignore depending on system requirements.
Five years to the day since the launch of the Raspberry Pi (which sold a hundred thousand units in the first day), the Raspberry Pi Foundation has announced the Raspberry Pi Zero W, a new variant of Raspberry Pi Zero with wireless LAN and Bluetooth, priced at only $10.
So what’s the story?
In November 2015, the diminutive $5 entry-level Raspberry Pi, the Raspberry Pi Zero, was launched. This represented a fivefold reduction in cost over the original Model A: it was cheap enough that one was even stuck on the front cover of The MagPi, risking civil insurrection in newsagents up and down the land.
Over the ensuing fifteen months, Zero grew a camera connector and found its way into everything from miniature arcade cabinets to electric skateboards. Many of these use cases need wireless connectivity.
The homebrew “People in Space” indicator in the lobby at Pi Towers is a typical example, with an official wireless dongle hanging off the single USB port: users often end up adding a USB hub to allow them to connect a keyboard, a mouse and a network adapter, and this hub can easily cost more than the Zero itself.
Zero W fixes this problem by integrating more functionality into the core product. It uses the same Cypress CYW43438 wireless chip as Raspberry Pi 3 Model B to provide 802.11n wireless LAN and Bluetooth 4.0 connectivity.
The Zero W makes a better general-purpose computer because you’re less likely to need a hub: if you’re using Bluetooth peripherals you might well end up with nothing at all plugged into the USB port. And of course it’s a great platform for experimenting with IoT applications.
To accompany Raspberry Pi Zero W, we’ve been working with our friends at Kinneir Dufort and T-Zero to create an official injection-moulded case. This shares the same design language as the official case for the Raspberry Pi 3, and features three interchangeable lids:
The case set also includes a short camera adapter flexi, and a set of rubber feet to make sure your cased Zero or Zero W doesn’t slide off the desk.
[no prices available]