Texas Instruments BQ24104
The bqSWITCHER™ series are highly integrated Liion 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.FEATURES
●1 Ideal For Highly Efficient Charger Designs For Single-, Two-, or Three-Cell Li-Ion and Li-Polymer Battery Packs● bq24105 Also for LiFePO4 Battery (see Using bq24105 to Charge the LiFePO4 Battery)
● Integrated Synchronous Fixed-Frequency PWM Controller Operating at 1.1 MHz With 0% to 100% Duty Cycle
● Integrated Power FETs for Up To 2-A Charge Rate
● High-Accuracy Voltage and Current Regulation
● Available in Both Stand-Alone (Built-In Charge Management and Control) and System-Controlled (Under System Command) Versions
● Status Outputs for LED or Host Processor Interface Indicates Charge-In-Progress, Charge Completion, Fault, and AC-Adapter Present Conditions
● 20-V Maximum Voltage Rating on IN and OUT Pins
● High-Side Battery Current Sensing
● Battery Temperature Monitoring
● Automatic Sleep Mode for Low Power Consumption
● System-Controlled Version Can Be Used in NiMH and NiCd
APPLICATIONS
● Reverse Leakage Protection Prevents Battery Drainage● Thermal Shutdown and Prote...