Overview
The BQ24192RGET from Texas Instruments is a highly integrated, 4.5-A switch-mode battery charge management IC designed for single-cell Li-Ion and Li-polymer batteries. This device is part of the bq24190, bq24192, and bq24192I family and is particularly suited for a wide range of portable devices, including tablets and other mobile electronics. It features narrow VDC (NVDC) power path management, ensuring efficient system power path management even when the battery is deeply discharged or removed. The charger operates autonomously with or without host management, making it a versatile solution for various charging scenarios.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Package Type | VQFN (24-pin) | 4.00 mm x 4.00 mm |
| Input Current Limit | Up to 3 A (default: 1.5 A) | Set via ILIM pin |
| Charge Current | Up to 4.5 A (default: 2.048 A) | Programmable |
| Battery Voltage Regulation | ±0.5% (0°C to 125°C) | |
| Charge Efficiency | 92% at 2 A, 90% at 4 A | |
| Boost Efficiency | 93% at 1 A | |
| Switching Frequency | 1.5 MHz | |
| Operating Temperature Range | -40°C to 85°C | |
| Junction Temperature Range | -40°C to 150°C | |
| Storage Temperature Range | -65°C to 150°C |
Key Features
- High Efficiency Charging: Achieves up to 92% charge efficiency at 2 A and 90% at 4 A, with 93% boost efficiency at 1 A.
- Autonomous Charging: Initiates and completes charging cycles without software control, automatically detecting battery voltage and charging in three phases: pre-conditioning, constant current, and constant voltage.
- NVDC Power Path Management: Ensures system power path management even when the battery is deeply discharged or removed, maintaining system operation above a minimum system voltage.
- I2C Interface: Provides flexible charging and system settings through an I2C serial interface.
- Safety Features: Includes dual pack negative thermistor monitoring, charging safety timer, over-voltage/over-current protections, and thermal regulation to reduce charge current when the junction temperature exceeds 120°C.
- USB Compliance: Compliant with USB 2.0 and USB 3.0 power specifications, and meets USB On-the-Go operation power rating specifications.
- Status Indicators: STAT output reports charging status and fault conditions, PG output indicates a good power source, and INT notifies the host of faults.
Applications
The BQ24192RGET is designed for use in a variety of portable electronic devices, including:
- Tablets and e-readers
- Smartphones and mobile phones
- Portable media players and gaming devices
- Other single-cell Li-Ion and Li-polymer battery-powered devices
Q & A
- What is the maximum charge current of the BQ24192RGET?
The maximum charge current is up to 4.5 A, with a default setting of 2.048 A.
- What types of input sources does the BQ24192RGET support?
The device supports standard USB host ports, USB charging ports, and high power DC adapters.
- How does the BQ24192RGET manage power when the battery is deeply discharged or removed?
The device uses NVDC power path management to maintain system operation above a minimum system voltage even when the battery is deeply discharged or removed.
- What safety features are included in the BQ24192RGET?
The device includes dual pack negative thermistor monitoring, charging safety timer, over-voltage/over-current protections, and thermal regulation.
- How does the BQ24192RGET communicate with the host system?
The device uses an I2C serial interface for communication and setting charging and system parameters.
- What is the operating temperature range of the BQ24192RGET?
The operating temperature range is -40°C to 85°C.
- How does the BQ24192RGET indicate charging status and faults?
The device uses STAT output to report charging status and fault conditions, PG output to indicate a good power source, and INT to notify the host of faults.
- Is the BQ24192RGET compliant with USB standards?
Yes, it is compliant with USB 2.0 and USB 3.0 power specifications and meets USB On-the-Go operation power rating specifications.
- What is the package type and size of the BQ24192RGET?
The device is available in a 24-pin VQFN package with dimensions of 4.00 mm x 4.00 mm.
- How does the BQ24192RGET handle thermal regulation?
The device reduces charge current when the junction temperature exceeds 120°C (programmable).
