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Nearby Share data service

06.08.2020

Google introduced the Nearby Share technology for transferring files between devices. This is an analogue of Apple AirDrop for Android smartphones. This technology will work for Android 6.0 and later.

Usually, when a user wants to send a picture or a link to a friend, you need to send it through the messenger, even if the users are next to each other. Nearby Share technology makes it faster.

To, for example, transfer a picture in this way, you need to select the "Share" option for it, and then - Nearby Share. The user will see a list of devices to which you can send a picture, you can select a device and send the file.

The new technology works with several types of communication at once (Bluetooth, Bluetooth Low Energy, WebRTC, Wi-Fi, peer-to-peer Wi-Fi), which allows you to share files even if the user is completely disconnected from the Internet. Nearby Share will automatically select the protocol with the best connection to transfer the file.

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MAX17509 Dual Channel 16V 3A DC/DC Regulator 21.08.2015

The MAX17509 from Maxim Integrated is a new high performance DC/DC buck regulator with a wide input voltage range (up to 16V). The MAX17509 contains two independent, individually programmable buck converters. Each of the channels is capable of operating on an independent load with a consumption current of up to 3 A. In addition, the microcircuit can be reconfigured into a single-channel two-phase conversion mode with a maximum output current of up to 6 A.

The converter provides ample customization options, thanks to the possibility of simple flexible programming using external resistors. For example, the output voltage can be set in 20mV increments with +/-2% accuracy. The MAX17509 includes automatically reconfigurable feedback compensation circuits, eliminating the need for a designer to tune the converter operation. In addition to this, thanks to the built-in power switches operating in a synchronous circuit, the external tying circuit is greatly simplified. Ceramic capacitors can be used in the input and output circuits.

Another key feature is the programmable rise time in the conversion cycle, which allows you to fine-tune the converter to work with consumers sensitive to interference.

The MAX17509 has surge and sag protection (OV,UV), overtemperature protection (160°C automatic shutdown), and overcurrent (OC) protection with adjustable mode (hiccup/latch). In addition, such functions as soft start/stop with a specified time and external synchronization of the conversion frequency will be convenient. The microcircuit is produced in a miniature but convenient TQFN-32 package (5x5 mm).

Main technical parameters of MAX17509:

Input voltage: 4,5V...16V;
Output current: 2x3 A or 1x6 A;
Output voltage: 0,904 V...5,048 V;
Conversion frequency: 500 kHz...2000 kHz;
R(s-i) open built-in MOSFET: 50 mΩ;
Operating temperature range: -40...+125°C.

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