Description
The bq2409x series of devices are highly integratedLi-ion and Li-Pol linear chargers devices targeted atspace-limited portable applications. The devicesoperate from either a USB port or AC adapter. Thehigh input voltage range with input overvoltageprotection supports low-cost unregulated adapters.The bq2409x has a single power output that chargesthe battery. A system load can be placed in parallelwith the battery as long as the average system loaddoes not keep the battery from charging fully duringthe 10-hour safety timer.
The battery is charged in three phases: conditioning,constant current and constant voltage. In all chargephases, an intemal control loop monitors the ICjunction temperature and reduces the charge currentif an internal temperature threshold is exceeded.
Applications
Smart Phones
PDAs
MP3 Players
Low-Power Handheld Devices
Features
●Charging
- 1% Charge Voltage Accuracy
- 10% Charge Current Accuracy
-
Pin Selectable USB 100-mA and 500-mA
Maximum Input Current Limit
一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 - %z 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
一Avilable in Small 10-Pin MSOP Package
Feature
Description
The bq2409x series of devices are highly integratedLi-ion and Li-Pol linear chargers devices targeted atspace-limited portable applications. The devicesoperate from either a USB port or AC adapter. Thehigh input voltage range with input overvoltageprotection supports low-cost unregulated adapters.The bq2409x has a single power output that chargesthe battery. A system load can be placed in parallelwith the battery as long as the average system loaddoes not keep the battery from charging fully duringthe 10-hour safety timer.
The battery is charged in three phases: conditioning,constant current and constant voltage. In all chargephases, an intemal control loop monitors the ICjunction temperature and reduces the charge currentif an internal temperature threshold is exceeded.
Applications
Smart Phones
PDAs
MP3 Players
Low-Power Handheld Devices
Features
●Charging
- 1% Charge Voltage Accuracy
- 10% Charge Current Accuracy
-
Pin Selectable USB 100-mA and 500-mA
Maximum Input Current Limit
一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 - %z 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
一Avilable in Small 10-Pin MSOP Package
