A boost-topology battery charger powered from a solar panel
November 02, 2011 // Jeff Falin, Wang Li, TI // 0 commentsDownload White Paper 185Ko
Solar charging of batteries has recently become very popular. A solar cell's typical voltage is 0.7 V. Many panels have eight cells in series and are therefore capable of producing 5.6 V at most. This voltage is adequate for charging a single Li-ion battery, such as that used in cell phones, to 4.2 V with a buck or step-down charger. However, using the same panel to charge a multicell Li-ion battery like that used in laptop computers requires a boost or step-up charger. This paper identifies the key concerns in implementing such a modification and provides a design example that uses the Texas Instruments bq24650 solar battery charger.
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To ensure you have a good start in 2015, Freescale is giving away five of its QorIQ TWR-LS1021A Tower system modules, worth USD269 each, for EETimes Europe's readers to win.
The module is the most feature-rich and high-performance Tower system offered by Freescale, enabling compatibility and interoperability with the growing list of Tower expansion modules, offering an easily accessible and interchangeable suite of capabilities and features to support rapid prototyping as well as software development programs.Built around the QorIQ LS1021A processor, incorporating dual ARM Cortex-A7 cores running up to 1GHz and delivering more than 5,000 Coremarks of performance, the TWR-LS1021A is engineered to enable a wide range of applications, from IoT gateways to industrial controllers, secure access points and asset management systems. MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.