?DV2954S1L开发系统提供了BQ2954锂离子电池快速充电IC的开发环境。The DV2954S1L incorporates a bq2954 and a buck-type switch-mode regulator to provide fast-charge control for 1 through 4 Li-Ion cells.Fast charge is preceded by a pre-charge qualification period.Fast charge termination occurs on:
Minimum current - IMAX?divided by 10, 15, or 20
Maximum time-out
The bq2954 can be reset and a new charge cycle started by applicaton of power to the board or battery replacement. The board automatically initiates a recharge when the battery voltage drops to 3.85V per cell.The user provides a DC power supply and batteries and configures the board for the number of cells, the minimum current threshold, and the LED display mode. The board has direct connections for the battery and the provided thermistor.Before using the DV2954S1L board, please review the bq2954 data sheet.
特性
bq2954 fast-charge control evaluation and development, based on switching buck converter with low-side battery current sensing
On-board configuration for fast charge of 1, 2, 3, or 4 Li-Ion cells
Charge termination by maximum voltage, selectable minimum current, or maximum time-out
Constant current (up to 1.25A) and constant voltage(up to 16.8V) provided by on-board switch-mode regulator
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2012-10-16
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