BQ24105 Datasheet

PMIC - Battery Management


The BQ24105 series are highly integratedLi-ion and Li-polymer switch-mode chargemanagement devices targeted at a wide range ofportable applications. The BQ24105 seriesoffers integrated synchronous PWM controller andpower FETs, high-accuracy current and voltageregulation, charge preconditioning, charge status, andcharge termination, in a small, thermally enhancedQFN package. The system-controlled versionprovides additional inputs for full charge managementunder system control.The BQ24105 charges the battery in threephases: conditioning, constant current, and constantvoltage. Charge is terminated based on userselectable minimum current level. A programmablecharge timer provides a safety backup for chargetermination. The BQ24105 automatically restartsthe charge cycle if the battery voltage falls below aninternal threshold. The BQ24105 automaticallyenters sleep mode when VCC supply is removed. BQ24105 Features • Ideal For Highly Efficient Charger Designs ForSingle-, Two- or Three-Cell Li-Ion andLi-PolymerBattery Packs• Integrated Synchronous Fixed-FrequencyPWM Controller Operating at 1.1 MHz With0% to 100% Duty Cycle• Integrated Power FETs For Up To 2-A ChargeRate• High-Accuracy Voltage and CurrentRegulation• Available In Both Stand-Alone (Built-In ChargeManagement and Control) andSystem-Controlled (Under System Command)Versions• Status Outputs For LED or Host ProcessorInterface Indicates Charge-In-Progress,Charge Completion, Fault, and AC-AdapterPresent Conditions• 20-V Maximum Voltage Rating on IN and OUTPins• High-Side Current Sensing• Optional Battery Temperature Monitoring• Automatic Sleep Mode for Low PowerConsumption• System-Controlled Version Can Be Used InNiMH and NiCd Applications• Uses Ceramic Capacitors• Reverse Leakage Protection Prevents BatteryDrainage• Thermal Shutdown and Protection• Built-In Battery Detection BQ24105 Applications • Handheld Products• Portable Media Players• Industrial and Medical Equipment• Portable Equipment


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Manufacturer information


Diodes Incorporated is a leading global manufacturer and supplier of high-quality, application-specific, standard products within the broad discrete, logic and analog semiconductor markets. Diodes Incorporated primarily serves the computing, consumer, communications, industrial and automotive segments. Diodes’ diverse product portfolio includes parts for LCD/LED TVs and displays, desktop, notebook and tablet computing, smartphones and hand-held devices, set-top boxes, power supplies and USB protection as well as many other application areas.

Diodes Incorporated offers a wide array of products including diodes, rectifiers, transistors, MOSFETs, gate drivers, protection devices, function-specific arrays, amplifiers and comparators, Hall-effect sensors and temperature sensors, power management devices including LED drivers, AC-DC converters and controllers, DC-DC switching regulators, linear voltage regulators, current monitors, and voltage reference and shunt regulators, along with special function devices including USB power switches, load switch devices, voltage supervisors and motor controllers.

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