1-cell, 1-A, Li-ion battery charger with 100kΩ NTC
Product details
Parameters
Package | Pins | Size
Features
- Charging
- 1% Charge Voltage Accuracy
- 10% Charge Current Accuracy
- Pin Selectable USB 100-mA and 500-mA
Maximum Input Current Limit - Programmable Termination and Precharge
Threshold
- Protection
- 6.6 V Over-Voltage Protection
- Input Voltage Dynamic Power Management
- 125°C Thermal Regulation; 150°C Thermal
Shutdown Protection - OUT Short-Circuit Protection and ISET Short
Detection - Operation Over JEITA Range via Battery
NTC – ½ Fast-Charge-Current at Cold, 4.06V
at Hot, bq24092/3 - Fixed 10-Hour Safety Timer
- System
- Automatic Termination and Timer Disable
Mode (TTDM) for Absent Battery Pack With
Thermistor - Status Indication – Charging/Done
- Available in Small 10-Pin MSOP Package
- Automatic Termination and Timer Disable
- APPLICATIONS
- Smart Phones
- PDAs
- MP3 Players
- Low-Power Handheld Devices
All other trademarks are the property of their respective owners
Description
The bq2409x series of devices are highly integrated Li-ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.
The bq2409x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10-hour safety timer.
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 an 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 pre-charge current and termination current threshold are programmed via an external resistor. The fast charge current value is also programmable via an external resistor.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | bq2409x 1A, Single-Input, Single Cell Li-Ion and Li-Pol Battery Charger datasheet (Rev. G) | Aug. 03, 2015 |
Technical article | When to use rechargeable batteries in small battery applications | Oct. 01, 2019 | |
Application note | BQ2404x, BQ2405x, and BQ2409x Frequently Asked Questions | Feb. 25, 2019 | |
Technical article | Should I use a linear charger or a switching charger? | Oct. 30, 2015 | |
Technical article | Summertime and the livin' is easy | Jun. 20, 2014 | |
Application note | Building your own Battery Simulator | Oct. 14, 2013 | |
User guide | 1.0-A Single-Input, Single-Cell Li-Ion Battery Charger . | Dec. 31, 2012 | |
Application note | Selecting the Best bq2404x/5x/9x Single Cell Battery Charger for your Applicatio | Nov. 29, 2012 | |
User guide | 1.0-A Single-Input, Single-Cell Li-Ion Battery Charger (Rev. A) | Jun. 07, 2010 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The user’s guide for BQ24091EVM describes the bq24091 evaluation module (EVM), how to perform a stand-alone evaluation or interface with a host or system. The charger is designed to deliver up to 1000mA of continuous current to the battery output when programmed with a resistor on the ISET pin (...)
Design tools & simulation
Reference designs
Design files
-
download TIDA-00043 BOM.pdf (25KB) -
download TIDA-00043 PCB.pdf (104KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
HVSSOP (DGQ) | 10 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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