The bqSWITCHER™ series are highly integrated Li-ion and Li-polymer switch-mode charge management devices targeted at a wide range of portable applications. The bqSWITCHER™ series offers integrated synchronous PWM controller and power FETs, high-accuracy current and voltage regulation, charge preconditioning, charge status, and charge termination, in a small, thermally enhanced VQFN package. The system-controlled version provides additional inputs for full charge management under system control.
The bqSWITCHER™ charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on user- selectable minimum current level. A programmable charge timer provides a safety backup for charge termination. The bqSWITCHER™ automatically restarts the charge cycle if the battery voltage falls below an internal threshold. The bqSWITCHER™ automatically enters sleep mode when VCC supply is removed.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
bq241xx | VQFN (20) | 3.50 mm × 4.50 mm |
Changes from O Revision (March 2010) to P Revision
Changes from M Revision (August 2008) to N Revision
Changes from L Revision (December 2007) to M Revision
Changes from K Revision (November 2007) to L Revision
Changes from J Revision (October 2007) to K Revision
Changes from I Revision (August 2007) to J Revision
Changes from H Revision (July 2007) to I Revision
Changes from G Revision (June 2007) to H Revision
Changes from F Revision (January 2007) to G Revision
CHARGE REGULATION VOLTAGE (V) | INTENDED APPLICATION | PART NUMBER (1) (2) (3) |
---|---|---|
4.2 V | Stand-alone | bq24100 |
1 or 2 cells selectable (CELLS pin, 4.2 V or 8.4 V) | Stand-alone | bq24103 |
1 or 2 cells selectable (CELLS pin, 4.2 V or 8.4 V) | Stand-alone | bq24103A |
1 or 2 cells selectable (CELLS pin, 4.2 V or 8.4 V) (Blinking status pins) |
Stand-alone | bq24104 |
Externally programmable (2.1 V to 15.5 V) | Stand-alone | bq24105 |
4.2 V (Blinking status pins) | Stand-alone | bq24108 |
bq24109 | ||
1 or 2 cells selectable (CELLS pin, 4.2 V or 8.4 V) | System-controlled | bq24113 |
1 or 2 cells selectable (CELLS pin, 4.2 V or 8.4 V) | System-controlled | bq24113A |
Externally programmable (2.1 V to 15.5 V) | System-controlled | bq24115 |