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Parameters

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Package | Pins | Size

HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 VQFN (RGW) 20 25 mm² 5 x 5 open-in-new Find other Battery charger ICs

Features

  • Highly Integrated Solution With FET Pass Transistor and Reverse-Blocking Schottky and Thermal Protection
  • Integrated Voltage and Current Regulation With Programmable Charge Current
  • High-Accuracy Voltage Regulation (±1%)
  • Ideal for Low-Dropout Linear Charger Designs for Single-Cell Li-Ion Packs With Coke or Graphite Anodes
  • Up to 1.2-A Continuous Charge Current
  • Safety-Charge Timer During Preconditioning and Fast Charge
  • Integrated Cell Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage of Charge
  • Optional Temperature or Input-Power Monitoring Before and During Charge
  • Various Charge-Status Output Options for Driving Single, Double, or Bicolor LEDs or Host-Processor Interface
  • Charge Termination by Minimum Current and Time
  • Low-Power Sleep Mode
  • Packaging: 5 mm × 5 mm MLP or 20-Lead TSSOP PowerPAD™
  • APPLICATIONS
    • PDAs
    • Internet Appliances
    • MP3 Players
    • Digital Cameras

PowerPAD is a trademark of Texas Instruments.

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Description

The bq2400x series ICs are advanced Li-Ion linear charge management devices for highly integrated and space-limited applications. They combine high-accuracy current and voltage regulation; FET pass-transistor and reverse-blocking Schottky; battery conditioning, temperature, or input-power monitoring; charge termination; charge-status indication; and charge timer in a small package.

The bq2400x measures battery temperature using an external thermistor. For safety reasons, the bq2400x inhibits charge until the battery temperature is within the user-defined thresholds. Alternatively, the user can monitor the input voltage to qualify charge. The bq2400x series then charge the battery in three phases: preconditioning, constant current, and constant voltage. If the battery voltage is below the internal low-voltage threshold, the bq2400x uses low-current precharge to condition the battery. A preconditioning timer is provided for additional safety. Following pre-conditioning, the bq2400x applies a constant-charge current to the battery. An external sense-resistor sets the magnitude of the current. The constant-current phase is maintained until the battery reaches the charge-regulation voltage. The bq2400x then transitions to the constant voltage phase. The user can configure the device for cells with either coke or graphite anodes. The accuracy of the voltage regulation is better than ±1% over the operating junction temperature and supply voltage range.

Charge is terminated by maximum time or minimum taper current detection

The bq2400x automatically restarts the charge if the battery voltage falls below an internal recharge threshold.

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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
BQ24040 ACTIVE Standalone 1-cell 1-A linear battery charger with 4.2-V VBAT and Temperature Sensing This product is a 1A, single-input, single cell Li-Ion and Li-Pol battery charger

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet Single-Cell Li-Ion Charge Management IC for PDAs and Internet Appliances datasheet (Rev. E) Nov. 09, 2004
Technical articles When to use rechargeable batteries in small battery applications Oct. 01, 2019
Application note PowerPAD™ Thermally Enhanced Package (Rev. H) Jul. 06, 2018
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
User guide bq24001/2/3/7 Single-Cell Li-Ion Jun. 28, 2002

Design & development

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

Software development

SUPPORT SOFTWARE Download
Temp Sense Designer Software
TEMPSENSE-SW The TempSense Designer software allows the user to easily design temperature sensing circuits for many of the Texas Instruments battery charger devices. A full listing of the supported devices is included under the "Support" menu in the program. The user can use the thermisters included in the (...)
Features

The program gives the user:

  • Worse-case limits of the resistance
  • Trip voltages
  • Temperatures of the design

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 20 View options
VQFN (RGW) 20 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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