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Synchronous Switch-mode 1-cell Li-ion charger w/2A FET, enhanced EMI performance

Inventory: 4,095
Custom reel may be available

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  |   View additional information for BQ24120

Packaging information

Package | Pins VQFN (RHL) | 20
Operating temperature range (℃) I (-40 to 85)
Package qty | Carrier: 250 | SMALL T&R
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Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-2-260C-1 YEAR
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View


  • Enhanced EMI Performance
  • Integrated Power FETs For Up To 2-A Charge
  • Suitable For 1-, 2-, or 3-Cell Li-Ion and Li-Polymer
    Battery Packs
  • Synchronous Fixed-Frequency PWM Controller
    Operating at 1.1 MHz With 0% to 100% Duty
  • High-Accuracy Voltage and Current Regulation
  • Status Outputs For LED or Host Processor
    Interface Indicates Charge-In-Progress, Charge
    Completion, Fault, and AC-Adapter Present
  • 20-V Absolute Maximum Voltage Rating on IN and
    OUT Pins
  • Accurate High-Side Battery Current Sensing
  • Battery Temperature Monitoring
  • Automatic Sleep Mode for Low Power
  • Reverse Leakage Protection Prevents Battery
  • Thermal Shutdown and Protection
  • Built-In Battery Detection
  • Available in 20-pin 3.5-mm × 4.5-mm VQFN


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 VCC supply is removed.

Qty Price
1-99 $3.63
100-249 $2.96
250-999 $2.33
1,000+ $1.97