The BQ24650, developed by Texas Instruments, is a highly integrated switch-mode battery charge controller designed to offer efficient charging solutions for solar power applications and portable instruments. This component stands out for its capability to handle a wide input voltage range from 5 V to 28 V, making it suitable for various solar panel configurations. It features Maximum Power Point Tracking (MPPT) to ensure optimal energy extraction from solar panels by adjusting the input voltage to match the panel's maximum power output. The BQ24650 supports charging for multiple chemistries including Li-Ion/Polymer, LiFePO4, and lead acid batteries, with programmable charge current and voltage regulation to accommodate specific battery requirements. Its synchronous buck controller operates at 600 kHz, enabling compact circuit design due to smaller external components. Additionally, the device includes a host of protection features such as input overvoltage protection, thermal shutdown, and battery temperature sensing for safe operation. The BQ24650 is packaged in a small 3.5 mm x 3.5 mm, 16-pin QFN, offering a compact solution for space-constrained applications. Its diverse range of applications includes solar-powered systems, remote monitoring stations, portable handheld instruments, and 12-V to 24-V automotive systems, highlighting its versatility and adaptability to various power management tasks.

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The IL3185 and IL3122 from NVE Corporation are galvanically isolated, differential bus transceivers designed for bidirectional data communication on balanced transmission lines. Utilizing NVE's patented IsoLoop spintronic Giant Magnetoresistance (GMR) technology, these components offer a low-cost solution for RS-485 and RS-422 applications. The IL3185 is tailored for half-duplex RS-485 communication, supporting up to 32 devices on the bus with a data rate of up to 5 Mbps, and features a fail-safe mechanism that ensures a logic high output when the bus lines are open or floating. The IL3122, on the other hand, is designed for full-duplex RS-422 communication, also supporting up to 32 devices on the bus at a data rate of 5 Mbps with a fail-safe feature. Both devices are compatible with 3.3V and 5V input supplies, offer thermal shutdown protection, and are capable of withstanding up to +15kV ESD. They provide 2500 VRMS of isolation for one minute and feature a typical common-mode rejection of 20 kV/μs, making them suitable for applications in industrial control networks, building environmental controls, and other systems requiring reliable data communication in electrically noisy environments.

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