Overview
The Texas Instruments BQ24232RGTR is a highly integrated Li-ion linear charger and system power-path management device. It is designed for space-limited portable applications and operates from either a USB port or an AC adapter, supporting charge currents between 25 mA and 500 mA. The device features a high-input-voltage range with input overvoltage protection, making it compatible with low-cost, unregulated adapters. The BQ24232RGTR meets USB-IF inrush current specifications and includes dynamic power management to protect against poorly designed or incorrectly configured USB sources.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VQFN (RGT) | - |
| Pins | 16 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Input Voltage Range | 4.35 to 10.2 | V |
| Input Current Limit | 100 mA to 500 mA | - |
| Charge Current | Up to 500 mA | - |
| Overvoltage Protection | 10.5 V | - |
| Junction Temperature | -40 to 125 | °C |
| Storage Temperature | -65 to 150 | °C |
Key Features
- Fully compliant with USB charger standards
- Selectable 100-mA and 500-mA maximum input current
- Input-based dynamic power management (VIN-DPM) for protection against poor USB sources
- 28-V input rating with overvoltage protection
- Integrated dynamic power-path management (DPPM) function
- Supports up to 500-mA charge current with current monitoring output (ISET)
- Programmable input current limit up to 500 mA for wall adapters
- Programmable termination current
- Programmable precharge and fast-charge safety timers
- Reverse current, short-circuit, and thermal protection
- NTC thermistor input
- Proprietary start-up sequence limits inrush current
- Status indication – charging/done, power good
- Small 3 mm × 3 mm 16-lead QFN package
Applications
- Bluetooth devices
- Low-power handheld devices
- Other space-limited portable applications
Q & A
- What is the BQ24232RGTR used for?
The BQ24232RGTR is used as a highly integrated Li-ion linear charger and system power-path management device for space-limited portable applications.
- What are the input voltage and current limits of the BQ24232RGTR?
The input voltage range is 4.35 V to 10.2 V, and the input current limit is selectable between 100 mA and 500 mA.
- Does the BQ24232RGTR support USB charging?
- What is the maximum charge current supported by the BQ24232RGTR?
The device supports up to 500-mA charge current with current monitoring output (ISET).
- What kind of protection does the BQ24232RGTR offer?
The device offers reverse current, short-circuit, and thermal protection, as well as overvoltage protection up to 10.5 V.
- How does the dynamic power-path management (DPPM) function work?
The DPPM function powers the system while simultaneously and independently charging the battery, reducing charge current when the input current limit causes the system output to fall to the DPPM threshold.
- Can the BQ24232RGTR operate with a defective or absent battery pack?
- How is the battery charged by the BQ24232RGTR?
The battery is charged in three phases: conditioning, constant current, and constant voltage, with an internal control loop monitoring the IC junction temperature.
- What is the purpose of the NTC thermistor input on the BQ24232RGTR?
The NTC thermistor input is used to monitor the temperature of the battery pack.
- What is the package size of the BQ24232RGTR?
The device comes in a small 3 mm × 3 mm 16-lead QFN package.
- What kind of status indications does the BQ24232RGTR provide?
The device provides status indications for charging/done and power good.
