This product is a lithium-ion battery charging management IC with low-voltage drop-out protection. It can be used for single or dual cell lithium-ion battery packs and supports coke or graphite anode materials.
The Benchmarq bq2057 series advanced Li-Ion linear charge-management ICs are designed for cost-sensitive and compact portable electronics. They combine high-accuracy current and voltage regulation, battery conditioning, temperature monitoring, charge termination, charge-status indication, and AutoComp charge-rate compensation in a single 8-pin IC.
The bq2057 continuously measures battery temperature using an external thermistor and inhibits charge until the battery temperature is within user-defined thresholds. It charges the battery in three phases: conditioning, constant current, and constant voltage, with charge termination based on minimum current tapering.
| Package | 8-pin SOIC, 8-pin TSSO, 8-pin PDIP |
|---|---|
| Dropout Voltage | as low as 0.3V |
| Voltage Regulation Accuracy | Better than ±1% |
| Supported Cells | Single- and dual-cell Li-Ion packs |
| Anode Types | Coke or graphite anodes |
| Fixed Voltage Versions | 4.1V, 4.2V, 8.2V, and 8.4V |
| Conditioning Charge Rate | 10% of regulation current |
The dropout voltage is as low as 0.3V.
Yes, it offers optional temperature-monitoring before and during charge.
The device is offered in four fixed-voltage versions: 4.1V, 4.2V, 8.2V, and 8.4V.