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Product details

Parameters

Number of series cells 1, 2, 3, 4, 5, 6 Charge current (Max) (A) 10 Operating Vin (Max) (V) 28 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (Min) (V) 2.1 Battery charge voltage (Max) (V) 26 Absolute Vin (safety rating) (Max) ((V)) 33 Control topology Switch-Mode Buck Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IINDPM (Input current limit), Input OVP, Power Path Operating Vin (Min) (V) 5 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

VQFN (RGE) 24 16 mm² 4 x 4 open-in-new Find other Battery charger ICs

Features

  • 600-kHz NMOS-NMOS Synchronous buck converter
  • Stand-alone charger support for li-ion or li-polymer
  • 5-V to 28-V VCC Input operating range and supports 1- to 6-battery cells (BQ24610)
  • 5-V to 24-V VCC Input operating range and supports 1- to 5-battery cells (BQ24617)
  • Up to 10-A charge current and adapter current
  • High-accuracy voltage and current regulation
    • ±0.5% Charge voltage accuracy
    • ±3% Charge current accuracy
    • ±3% Adapter current accuracy
  • Integration
    • Automatic system power selection from adapter or battery
    • Non Power Path option for low total BOM cost
    • Internal loop compensation and soft start
    • Dynamic power management
  • Safety protection
    • Input overvoltage protection
    • Battery thermistor sense hot and cold charge suspend
    • Battery detection
    • Reverse protection input FET
    • Programmable safety timer
    • Charge overcurrent protection
    • Battery short protection
    • Battery overvoltage protection
    • Thermal shutdown
  • Status Outputs
    • Adapter present
    • Charger operation status
  • Charge enable pin
  • 6-V Gate drive for synchronous buck converter
  • Energy star low quiescent current Iq
    • < 15-µA Off-state battery discharge current
    • < 1.5-mA Off-state input quiescent current

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Description

The BQ2461x is a highly integrated Li-ion, Li-polymer or Lead-acid switched-mode battery charge controller. The device offers a constant-frequency synchronous switching PWM controller with high-accuracy charge current and voltage regulation, charge preconditioning, termination, adapter current regulation, and charge status monitoring.

The BQ2461x charges the battery in three phases: preconditioning, constant current, and constant voltage.

Charge is terminated when the current reaches a minimum user-selectable level. A programmable charge timer provides a safety backup. The BQ2461x automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and enters a low quiescent current sleep mode when the input voltage falls below the battery voltage.

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Technical documentation

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Type Title Date
* Datasheet BQ2461x Stand-Alone 1- to 6-Cell Synchronous Buck Battery Charger Controller datasheet (Rev. D) Dec. 16, 2019
Application notes BQ24610 Functional Safety FIT Rate, and Pin FMA Oct. 06, 2020
Application notes How to Charge a Lead-Acid Battery With a Li-Ion Charger Apr. 29, 2020
Application notes Design Example Charge 3 Super Capacitors in Series with Health Monitoring Apr. 08, 2020
Application notes BQ241xx/BQ246xx Selection of Multi-Cell Standalone Switching Battery Chargers Dec. 31, 2019
Technical articles When to use rechargeable batteries in small battery applications Oct. 01, 2019
Technical articles Using battery charger ICs to shrink your design for vacuum robots Mar. 21, 2018
Technical articles Understanding battery charger features and charging topologies Sep. 19, 2016
Technical articles Should I use a linear charger or a switching charger? Oct. 30, 2015
More literature Battery Management Solutions for Point of Sale Systems Aug. 18, 2014
Application notes How to Review a Multicell Switching Charger Schematic Sep. 21, 2011
User guides bq2461x/bq2463x (HPA422A) Multi-Cell Synchronous Switch-Mode Charger (Rev. A) Jul. 27, 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
99
Description

The bq2461x is highly integrated Li-ion or Li-polymer switch-mode battery charge controllers. The bq2463x is highly integrated switch-mode battery charge controllers designed specifically to charge Lithium Phosphate battery chemistries. They offer a constant-frequency synchronous PWM controller with (...)

Features
  • Evaluation Module For bq2461x/bq2463x
  • High Efficiency Synchronous Buck Charger
  • User-programmable up to 26V Battery Voltage
  • AC Adapter Operating Range 5V to 28V
  • LED Indication for Control and Status Signals
  • Test Points for Key Signals Available for Testing Purpose. Easy Probe Hook-up.
  • Jumpers Available (...)

Design tools & simulation

CALCULATION TOOLS Download
SLUC175D.ZIP (782 KB)

Reference designs

REFERENCE DESIGNS Download
High Voltage Multi-Cell Synchronous Switch-Mode Charger Reference Design
TIDA-00040 This reference design provides a solution for charging the 7-cell Li-ion battery. It is an integrated Li-ion or Li-polymer switch-mode battery charge controller solution. It offers a constant-frequency synchronous switching PWM controller with high-accuracy charge current and voltage regulation (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN (RGE) 24 View options

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