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BQ2057 BQ2057C BQ2057T BQ2057W BQ Charging IC
Reviews
Category: BQ ICs
Description
The BQ2057 series (BQ2057 BQ2057C BQ2057T BQ2057W BQ Charging IC) are advanced linear charge management ICs optimized for single or dual-cell lithium-ion (Li-Ion) and lithium-polymer (Li-Pol) battery packs. These cost-effective devices integrate precise current and voltage regulation, temperature sensing, charge termination, and AutoComp™ compensation — ideal for compact portable applications such as handheld devices, Bluetooth accessories, and power banks.
- Supports Li-Ion and Li-Pol cells
- ±1% voltage regulation accuracy
- Integrated current control and temperature monitoring
- AutoComp™ charge-rate compensation
- Automatic recharge and termination control
- Compact 8-pin MSOP/TSSOP/SOIC packages
- Fixed voltage options: 4.1V / 4.2V / 8.2V / 8.4V
Specification
The BQ2057 ensures constant-voltage charging with ±1% regulation accuracy across the full operating temperature and supply range. Available in 4.1V, 4.2V, 8.2V, and 8.4V fixed-voltage versions, the IC automatically transitions from constant-current to constant-voltage mode and stops charging when the termination current is reached. If battery voltage drops below the recharge threshold, charging resumes automatically.
Available in MSOP, TSSOP, and SOIC packages, the BQ2057 series provides design flexibility while maintaining reliable battery protection and efficient charge control.