Overview
The Texas Instruments BQ24232RGTT is a highly integrated lithium-ion battery 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. The device supports charge currents between 25 mA and 500 mA and features a high-input-voltage range with input overvoltage protection, making it suitable for use with low-cost, unregulated adapters. The BQ24232RGTT is fully compliant with USB-IF standards and includes dynamic power management to protect against poorly designed or incorrectly configured USB sources.
Key Specifications
| Specification | Value |
|---|---|
| Package | 16-VQFN (RGT) with Thermal Pad |
| Pins | 16 |
| Operating Temperature Range | -40°C to 125°C (TJ) |
| Battery Chemistry | Lithium Ion |
| Battery Pack Voltage | 4.2V |
| Charge Current | Up to 500mA, programmable |
| Input Current Limit | Selectable 100-mA and 500-mA, programmable |
| Input Voltage Rating | 28V with 10.5V Overvoltage Protection |
| Interface | USB |
| Fault Protection | Over Temperature, Over Voltage, Reverse Current, Short Circuit |
Key Features
- Fully Compliant USB Charger with dynamic power management (VIN-DPM) to protect against poor USB sources.
- Selectable 100-mA and 500-mA maximum input current, ensuring compliance to USB-IF standard.
- Integrated dynamic power-path management (DPPM) function that powers the system while charging the battery independently.
- Programmable input current limit up to 500 mA for wall adapters and programmable termination current.
- Programmable precharge and fast-charge safety timers.
- Reverse current, short-circuit, and thermal protection.
- NTC thermistor input for temperature monitoring.
- Proprietary start-up sequence to limit inrush current.
- Status indication for charging/done and power good.
Applications
The BQ24232RGTT is targeted at space-limited portable applications such as smartphones, tablets, e-readers, and other handheld devices. It is also suitable for use in wearable electronics, IoT devices, and any other battery-powered portable equipment that requires efficient and safe battery charging and system power management.
Q & A
- What is the BQ24232RGTT? The BQ24232RGTT is a lithium-ion battery charger and system power-path management device from Texas Instruments.
- What are the supported charge currents? The device supports charge currents between 25 mA and 500 mA.
- What is the input voltage rating of the BQ24232RGTT? The input voltage rating is 28V with 10.5V overvoltage protection.
- Is the BQ24232RGTT compliant with USB standards? Yes, it is fully compliant with USB-IF standards.
- What kind of protection does the BQ24232RGTT offer? It offers over temperature, over voltage, reverse current, and short-circuit protection.
- How does the dynamic power-path management (DPPM) function work? The DPPM function powers the system while charging the battery independently, reducing charge current when the input current limit causes the system output to fall to the DPPM threshold.
- Can the input current limit and charge current be programmed? Yes, both the input current limit and charge current are programmable using external resistors.
- What is the operating temperature range of the BQ24232RGTT? The operating temperature range is -40°C to 125°C (TJ).
- What type of battery chemistry does the BQ24232RGTT support? It supports lithium-ion battery chemistry.
- What is the package type of the BQ24232RGTT? The package type is 16-VQFN (RGT) with a thermal pad.
