BQ24232H Series
USB-Friendly Lithium Based battery charger With power-Path For 4.35V Batteries
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
USB-Friendly Lithium Based battery charger With power-Path For 4.35V Batteries
| Part | Charge Current - Max [Max] | Supplier Device Package | Operating Temperature [Max] | Operating Temperature [Min] | Battery Pack Voltage | Battery Chemistry | Current - Charging | Voltage - Supply (Max) [Max] | Interface | Number of Cells | Package / Case | Fault Protection | Programmable Features | Mounting Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24232HRGTT | 500 mA | 16-VQFN (3x3) | 125 ¯C | -40 °C | 4.35 V | Lithium Ion | Constant - Programmable | 10.2 V | USB | 1 | 16-VFQFN Exposed Pad | Over Temperature, Over Voltage, Reverse Current, Short Circuit | Current, Timer | Surface Mount |
Texas Instruments BQ24232HRGTR | 500 mA | 16-VQFN (3x3) | 125 ¯C | -40 °C | 4.35 V | Lithium Ion | Constant - Programmable | 10.2 V | USB | 1 | 16-VFQFN Exposed Pad | Over Temperature, Over Voltage, Reverse Current, Short Circuit | Current, Timer | Surface Mount |
Key Features
• Fully Compliant USB ChargerSelectable 100-mA and 500-mA Maximum Input Current100-mA Maximum Current Limit Ensures Compliance to USB-IF StandardInput-based Dynamic Power Management (VIN– DPM) for Protection Against Poor USB Sources28-V Input Rating With Overvoltage Protection4.35-V Battery RegulationIntegrated Dynamic Power-Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the BatterySupports up to 500-mA Charge Current With Current Monitoring Output (ISET)Programmable Input Current Limit up to 500 mA for Wall AdaptersProgrammable Termination Current (bq24232H)Programmable Precharge and Fast-Charge Safety TimersReverse Current, Short-Circuit, and Thermal ProtectionNTC Thermistor InputProprietary Start-up Sequence Limits Inrush CurrentStatus Indication – Charging/Done, Power GoodSmall 3-mm × 3-mm 16-Lead QFN PackageFully Compliant USB ChargerSelectable 100-mA and 500-mA Maximum Input Current100-mA Maximum Current Limit Ensures Compliance to USB-IF StandardInput-based Dynamic Power Management (VIN– DPM) for Protection Against Poor USB Sources28-V Input Rating With Overvoltage Protection4.35-V Battery RegulationIntegrated Dynamic Power-Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the BatterySupports up to 500-mA Charge Current With Current Monitoring Output (ISET)Programmable Input Current Limit up to 500 mA for Wall AdaptersProgrammable Termination Current (bq24232H)Programmable Precharge and Fast-Charge Safety TimersReverse Current, Short-Circuit, and Thermal ProtectionNTC Thermistor InputProprietary Start-up Sequence Limits Inrush CurrentStatus Indication – Charging/Done, Power GoodSmall 3-mm × 3-mm 16-Lead QFN Package
Description
AI
The bq2423xH series of devices are highly 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 AC adapter and support charge currents from 25 mA to 500 mA. The high-input voltage range with input overvoltage protection supports low-cost, unregulated adapters. The USB input current limit accuracy and start-up sequence allow the bq2423xH to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing poorly designed or incorrectly configured USB sources.
The bq2423xH 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, this feature enables instant system turn-on 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.
The bq2423xH series of devices are highly 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 AC adapter and support charge currents from 25 mA to 500 mA. The high-input voltage range with input overvoltage protection supports low-cost, unregulated adapters. The USB input current limit accuracy and start-up sequence allow the bq2423xH to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing poorly designed or incorrectly configured USB sources.
The bq2423xH 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, this feature enables instant system turn-on 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.