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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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Type Title Date
* Datasheet BQ2407x Standalone 1-Cell 1.5-A Linear Battery Charger with PowerPath datasheet (Rev. M) Aug. 06, 2019
Application note 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 note Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) May 01, 2018
User guide bq24072/3/4/5/9(T) and bq24230/2 1.5-A Single-Chip Li-Ion (Rev. E) Jan. 03, 2017
Technical articles Should I use a linear charger or a switching charger? Oct. 30, 2015
Technical articles Summertime and the livin' is easy Jun. 20, 2014
Application note Selecting the Best bq2407x/23x Single Cell Battery Charger for your Application Nov. 08, 2012
Application note Designing a linear Li-Ion battery charger with power-path control May 01, 2009
Application note Q2 2009 Issue Analog Applications Journal May 01, 2009
User guide Power-Path Li-Ion Charger Selection Oct. 17, 2008

Design & development

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Hardware development

EVALUATION BOARD Download
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 (...)

Design tools & simulation

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

CAD/CAE symbols

Package Pins Download
VQFN (RGT) 16 View options

Ordering & quality

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