The BC-2000A step-up/step-down multichemistry battery charger charges with battery voltages above and below the adapter voltage. This highly integrated charger requires a minimum number of external components. The BC-2000A uses a proprietary step-up/stepdown control scheme that provides efficient charging. Analog inputs control charge current and voltage, and can be programmed by the host or hardwired.
The BC-2000A accurately charges two to four lithiumion (Li+) series cells at greater than 4A. A programmable input current limit is included, which avoids overloading the AC adapter when supplying the load and the battery charger simultaneously. This reduces the maximum adapter current, which reduces cost. The BC-2000A provides analog outputs to monitor the current drawn from the AC adapter and charge current. A digital output indicates the presence of an AC adapter. When the adapter is removed, the BC-2000A consumes less than 1µA from the battery.
The BC-2000A is available in a 32-pin thin QFN (5mm x 5mm) package and is specified over the -40°C to +85°C extended temperature range. The MAX1870A evaluation kit (BC-2000A EVKIT) is available to help reduce design time.
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Key Features
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Applications/Uses
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- Patented Step-Up/Step-Down Control Scheme*
- ±0.5% Charge-Voltage Accuracy
- ±9% Charge-Current Accuracy
- ±8% Input Current-Limit Accuracy
- Programmable Maximum Battery Charge Current
- Analog Inputs Control Charge Current, Charge Voltage, and Input Current Limit
- Analog Output Indicates Adapter Current
- Input Voltage from 8V to 28V
- Battery Voltage from 0 to 17.6V
- Charges Li+ or NiCd/NiMH Batteries
- Tiny 32-Pin Thin QFN (5mm x 5mm) Package
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OEM production are welcome!
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