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Product details

Parameters

Number of series cells 1 Charge current (Max) (A) 1.5 Operating Vin (Max) (V) 6.4 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (Min) (V) 4.2 Battery charge voltage (Max) (V) 4.2 Absolute Vin (safety rating) (Max) ((V)) 28 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Power Path, VINDPM (Input voltage threshold to maximize adaptor power) Operating Vin (Min) (V) 4.35 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

VQFN (RGT) 16 9 mm² 3 x 3 open-in-new Find other Battery charger ICs

Features

  • Fully compliant USB charger
    • Selectable 100-mA and 500-mA maximum input current
    • 100-mA Maximum current limit ensures compliance to USB-IF standard
    • Input-based dynamic power management (VIN-DPM) for protection against poor USB sources
  • 28-V Input Rating with Overvoltage Protection
  • Integrated dynamic power path management (DPPM) function simultaneously and independently powers the system and charges the battery
  • Supports up to 1.5-A charge current with current monitoring output (ISET)
  • Programmable input current limit up to 1.5 A for wall adapters
  • System output tracks battery voltage (bq24072)
  • Programmable termination current (bq24074)
  • Battery disconnect function with SYSOFF input (bq24075, bq24079)
  • Programmable Pre-charge and Fast-charge safety timers
  • Reverse current, short-circuit and thermal protection
  • NTC thermistor input
  • Proprietary start-up sequence limits inrush current
  • Status indication – Charging/done, power good

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Description

The BQ2407x series of devices are integrated Li-Ion linear chargers and system power path management devices targeted at space-limited portable applications. The devices operate from either a USB port or an AC adapter and support charge currents up to 1.5 A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the BQ2407x to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing incorrectly configured USB sources.

The BQ2407x features dynamic power path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold; thus, supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination and enables the system to run with a defective or absent battery pack.

Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally discharged battery. The power-path management architecture also lets the battery supplement the system current requirements when the adapter cannot deliver the peak system currents, thus enabling the use of a smaller adapter.

The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The input current limit and charge current are programmable using external resistors.

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Technical documentation

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No results found. Please clear your search and try again. View all 15
Type Title Date
* Datasheet BQ2407x Standalone 1-Cell 1.5-A Linear Battery Charger with PowerPath datasheet (Rev. M) Aug. 06, 2019
Application notes Configuring Standalone Linear Power Path Chargers (Rev. A) Apr. 06, 2020
Technical articles When to use rechargeable batteries in small battery applications Oct. 01, 2019
Application notes Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) May 01, 2018
Technical articles How to choose the right linear charger for your application Nov. 17, 2017
User guides bq24072/3/4/5/9(T) and bq24230/2 1.5-A Single-Chip Li-Ion (Rev. E) Jan. 03, 2017
Application notes Battery-charging considerations for low-power applications Apr. 26, 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
Technical articles Summertime and the livin' is easy Jun. 20, 2014
More literature Power Bank Charger ICs Feb. 25, 2013
Application notes Selecting the Best bq2407x/23x Single Cell Battery Charger for your Application Nov. 08, 2012
Application notes Designing a linear Li-Ion battery charger with power-path control May 01, 2009
Application notes Q2 2009 Issue Analog Applications Journal May 01, 2009
User guides Power-Path Li-Ion Charger Selection Oct. 17, 2008

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

This user’s guide describes the bq24072/3/4/5/9(T) and bq24230/2 (bqTiny-III™) evaluation module (EVM). The EVM provides a convenient method for evaluating the performance of a charge management and system power solution for portable applications using the bq24072/3/4/5/9(T) and (...)

Features
  • Input current limiting: 100 or 500 mA for USB, user-programmable for non-USB applications
  • Input voltage dynamic power management
  • 28V max Vin with OVP
  • Dynamic Power Management with integrated input and charge FETs
  • Voltage or current based thermister input options available

Design tools & simulation

GERBER FILES Download
SLUC342.ZIP (207 KB)
GERBER FILES Download
SLUC670.ZIP (350 KB)

Reference designs

REFERENCE DESIGNS Download
24-V AC Power Stage With Wide Vin Converter and Battery Gauge Reference Design for Smart Thermostat
TIDA-01395 — The TIDA-01395 TI Design provides a low BOM cost, high-efficiency power stage solution for smart thermostats, and other gateway building automation end quipment. This power stage takes a 24-V AC input and produces a 5-V and 3.3-V output rail, which can power additional point-of-load converters if (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
24-V AC Power Stage With Wide Vin Converter and Battery Backup Reference Design for Smart Thermostat
TIDA-01358 — The TIDA-01358 reference design provides a low BOM cost, high efficiency power stage solution for smart thermostats and other gateway building automation end equipment. This power stage takes a 24Vac input and produces a 5V and 3.3V output rail which can power additional point-of-load converters if (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Biometric Steering Wheel Reference Design
TIDA-00292 This reference design is for a concept demonstration of how a driver's pulse rate, respiration rate, and ECG based heart rate can be obtained from a vehicle steering wheel.  AFE4400 and AFE4300 from TI's biometric family of analog front-ends (AFE), enables acquisition of all three parameters via (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Optical Heart Rate Monitor Reference Design with BLE Connectivity
TIDA-00011 This reference design is for a complete Optical Heart Rate Monitor wrist watch (no chest strap!) end equipment featuring TI signal chain, power, and connectivity components. With TI's AFE4400 AFE, you can accelerate and simplify your wrist based HRM design while still ensuring measurement (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Pulse Oximeter via Finger Clip Reference Design with BLE Connectivity
TIDA-00010 This reference design is for a complete SPO2 Pulse Oximeter finger clip end equipment featuring TI signal chain, power, and connectivity components. With TI's AFE4490 Pulse Ox AFE, you can accelerate and simplify your pulse ox design while still ensuring the highest of quality clinical measurements (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
USB Li-Ion Battery Charger and Power-Path Management Reference Design
TIDA-00044 This reference solution is designed to deliver up to 1000mA of continuous current to the battery output when programmed with a resistor on the ISET pin and is programmed at the factory for ~540mA. The USB current limit modes are selected by the ISET2 pin and limits current to a maximum of 500mA (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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VQFN (RGT) 16 View options

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