BQ24232HA Series
USB Friendly 0.5A Li-ion charger with power-Path, 10.5V OVP
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
USB Friendly 0.5A Li-ion charger with power-Path, 10.5V OVP
| Part | Mounting Type | Battery Chemistry | Current - Charging | Charge Current - Max [Max] | Package / Case | Operating Temperature [Min] | Operating Temperature [Max] | Voltage - Supply (Max) [Max] | Programmable Features | Fault Protection | Interface | Battery Pack Voltage | Supplier Device Package | Number of Cells |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24232HARGTR | Surface Mount | Lithium Ion | Constant - Programmable | 500 mA | 16-VFQFN Exposed Pad | -5 °C | 125 °C | 10.2 V | Current, Timer | Over Temperature, Over Voltage, Reverse Current, Short Circuit | USB | 4.31 V | 16-VQFN (3x3) | 1 |
Texas Instruments BQ24232HARGTT | Surface Mount | Lithium Ion | Constant - Programmable | 500 mA | 16-VFQFN Exposed Pad | -5 °C | 125 °C | 10.2 V | Current, Timer | Over Temperature, Over Voltage, Reverse Current, Short Circuit | USB | 4.31 V | 16-VQFN (3x3) | 1 |
Key Features
• Fully Compliant USB ChargerSelectable 100-mA and 500-mA MaximumInput Current100-mA Maximum Current Limit EnsuresCompliance to USB-IF StandardInput-based Dynamic Power Management(VIN– DPM) for Protection Against Poor USBSources28-V Input Rating With Overvoltage ProtectionIntegrated Dynamic Power-Path Management(DPPM) Function Simultaneously andIndependently Powers the System and Chargesthe BatterySupports up to 500-mA Charge Current WithCurrent Monitoring Output (ISET)Programmable Input Current Limit up to 500 mAfor Wall AdaptersProgrammable Termination CurrentProgrammable Precharge and Fast-Charge SafetyTimersReverse Current, Short-Circuit, and ThermalProtectionNTC Thermistor InputProprietary Start-Up Sequence Limits InrushCurrentStatus Indication – Charging/Done, Power GoodSmall 3 mm × 3 mm 16-Lead QFN PackageFully Compliant USB ChargerSelectable 100-mA and 500-mA MaximumInput Current100-mA Maximum Current Limit EnsuresCompliance to USB-IF StandardInput-based Dynamic Power Management(VIN– DPM) for Protection Against Poor USBSources28-V Input Rating With Overvoltage ProtectionIntegrated Dynamic Power-Path Management(DPPM) Function Simultaneously andIndependently Powers the System and Chargesthe BatterySupports up to 500-mA Charge Current WithCurrent Monitoring Output (ISET)Programmable Input Current Limit up to 500 mAfor Wall AdaptersProgrammable Termination CurrentProgrammable Precharge and Fast-Charge SafetyTimersReverse Current, Short-Circuit, and ThermalProtectionNTC Thermistor InputProprietary Start-Up Sequence Limits InrushCurrentStatus Indication – Charging/Done, Power GoodSmall 3 mm × 3 mm 16-Lead QFN Package
Description
AI
The bq24232HA device is a highly integrated Li-ion linear charger and system power-path management device targeted at space-limited portable applications. The device operates from either a USB port or ac adapter and supports charge currents between 25 mA and 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 bq24232HA to meet USB-IF inrush current specification. Additionally, the input dynamic power management (VIN– DPM) prevents the charger from crashing poorly designed or incorrectly configured USB sources.
The bq24232HA 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 enables instant system turn-on even with a totally discharged battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents, 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 bq24232HA device is a highly integrated Li-ion linear charger and system power-path management device targeted at space-limited portable applications. The device operates from either a USB port or ac adapter and supports charge currents between 25 mA and 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 bq24232HA to meet USB-IF inrush current specification. Additionally, the input dynamic power management (VIN– DPM) prevents the charger from crashing poorly designed or incorrectly configured USB sources.
The bq24232HA 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 enables instant system turn-on even with a totally discharged battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents, 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.