BQ25505EVM-218

Series:	--
Part Status:	Active
Type:	Power Management
Function:	Energy Harvesting
Embedded:	--
Utilized IC / Part:	BQ25505
Primary Attributes:	--
Supplied Contents:	Board(s)
Secondary Attributes:	--

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IntroductionEvaluation and Demonstration Boards and Kits, such as the BQ25505EVM-218, are boards and kits used to evaluate, demonstrate, and analyze the performance of Texas Instruments (TI) products. The BQ25505EVM-218 evaluation and demonstration board offers a complete test platform for evaluating the performance of the TI BQ25505 battery charger, a highly efficient synchronous buck charge controller that incorporates a low-side MOSFET and features overvoltage, overcurrent, thermal overload, and charge status monitoring capabilities. It can also be used for test and characterization of battery packs and associated electronics.Application FieldThe BQ25505EVM-218 is primarily used in the charging of Lithium-ion (Li-ion) and Lithium-ion Polymer (LiPo) rechargeable batteries. The wide input voltage range of the BQ25505 allows it to be used in a variety of applications, such as portable medical and industrial equipment, and consumer electronics. It can also be used for applications such as embedded systems, automotive, and distributed power systems.The BQ25505EVM-218 is also used to evaluate the performance of batteries with cell voltages ranging from 1.5V to 4.2V, and charge currents up to 1.5A. By providing the appropriate settings, it can also be used to charge battery packs with cells in parallel or in series.Working PrincipleThe BQ25505EVM-218 evaluation and demonstration board works on the principle of synchronous buck charging. It consists of a regulated 40V peak synchronous buck charger which includes a low-side MOSFET. It is capable of charging single or multiple cell battery packs in parallel or in series. It is also capable of regulating the charger\'s output voltage, current, and status.The BQ25505 features USB-IF-compliant data cable detection, reverse battery insertion detection, and a programmable input voltage. It also has built-in protection measures such as overvoltage, overcurrent, and thermal overload protection.When charging a single cell battery pack, the BQ25505EVM-218 will regulate the output voltage to the programmed input voltage and charge current. When charging multiple cell battery packs, the BQ25505EVM-218 will regulate the charge voltage of each cell to the programmed input voltage and charge current. The progress of the charge is indicated by the LED on the board.ConclusionThe BQ25505EVM-218 evaluation and demonstration board is a complete test platform for evaluating the performance of the TI BQ25505 battery charger. It is a useful tool for evaluating the performance of single page Lithium-ion and Lithium-ion Polymer rechargeable batteries. It can also be used in a wide variety of applications to evaluate the performance of battery packs with cells in parallel or in series. The BQ25505EVM-218 uses synchronous buck charging and offers a range of features such as USB-IF-compliant data cable detection, reverse battery insertion detection, and overvoltage, overcurrent, and thermal overload protection.

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