BQ24123 Series

Standalone 1 cell 2A synchronous Buck battery charger with enhanced EMI performance

Catalog

Standalone 1 cell 2A synchronous Buck battery charger with enhanced EMI performance

Part	Battery Pack Voltage	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Mounting Type	Number of Cells [Min]	Number of Cells [Max]	Battery Chemistry	Voltage - Supply (Max) [Max]	Charge Current - Max [Max]	Current - Charging	Fault Protection	Programmable Features	Package / Case	Type	Contents	Utilized IC / Part	Supplied Contents	Function
Texas Instruments BQ24123RHLT	8.4 V	85 °C	-40 °C	20-VQFN (3.5x4.5)	Surface Mount	1	3 cells	Lithium Ion/Polymer	16 V	2 A	Constant - Programmable	Over Temperature	Current Timer	20-VFQFN Exposed Pad
Texas Instruments BQ24123EVM-002															Power Management	Board(s)	BQ24123	Board(s)	Battery Charger

Catalog

Standalone 1 cell 2A synchronous Buck battery charger with enhanced EMI performance

Key Features

• Enhanced EMI PerformanceIntegrated Power FETs For Up To 2-A ChargeRateSuitable For 1-, 2-, or 3-Cell Li-Ion and Li-PolymerBattery PacksSynchronous Fixed-Frequency PWM ControllerOperating at 1.1 MHz With 0% to 100% DutyCycleHigh-Accuracy Voltage and Current RegulationStatus Outputs For LED or Host ProcessorInterface Indicates Charge-In-Progress, ChargeCompletion, Fault, and AC-Adapter PresentConditions20-V Absolute Maximum Voltage Rating on IN andOUT PinsAccurate High-Side Battery Current SensingBattery Temperature MonitoringAutomatic Sleep Mode for Low PowerConsumptionReverse Leakage Protection Prevents BatteryDrainageThermal Shutdown and ProtectionBuilt-In Battery DetectionAvailable in 20-pin 3.5-mm × 4.5-mm VQFNPackageEnhanced EMI PerformanceIntegrated Power FETs For Up To 2-A ChargeRateSuitable For 1-, 2-, or 3-Cell Li-Ion and Li-PolymerBattery PacksSynchronous Fixed-Frequency PWM ControllerOperating at 1.1 MHz With 0% to 100% DutyCycleHigh-Accuracy Voltage and Current RegulationStatus Outputs For LED or Host ProcessorInterface Indicates Charge-In-Progress, ChargeCompletion, Fault, and AC-Adapter PresentConditions20-V Absolute Maximum Voltage Rating on IN andOUT PinsAccurate High-Side Battery Current SensingBattery Temperature MonitoringAutomatic Sleep Mode for Low PowerConsumptionReverse Leakage Protection Prevents BatteryDrainageThermal Shutdown and ProtectionBuilt-In Battery DetectionAvailable in 20-pin 3.5-mm × 4.5-mm VQFNPackage

Description

The bqSWITCHER™ series are highly integrated Li-ion and Li-polymer switched-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 QFN package. 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 VCCsupply is removed. The bqSWITCHER™ series are highly integrated Li-ion and Li-polymer switched-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 QFN package. 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 VCCsupply is removed.