Overview
The Texas Instruments BQ24123RHLR is a highly integrated Li-ion and Li-polymer switched-mode battery charger. It is part of the bqSWITCHER™ series, designed for a wide range of portable applications. This device features an integrated synchronous PWM controller and power FETs, providing high-accuracy current and voltage regulation. The BQ24123RHLR charges the battery in three phases: conditioning, constant current, and constant voltage, with charge termination based on a user-selectable minimum current level or a programmable charge timer. It also includes automatic sleep mode for low power consumption and thermal shutdown protection.
Key Specifications
| Parameter | Value |
|---|---|
| Package | VQFN (RHL) with 20 pins |
| Operating Temperature Range (°C) | -40 to 85 |
| Charge Rate | Up to 2A |
| Battery Type | 1-, 2-, or 3-Cell Li-Ion and Li-Polymer |
| Input Voltage | Up to 16V |
| Battery Charge Voltage | Up to 8.4V |
| Frequency | 1.1 MHz |
| Absolute Maximum Voltage Rating on IN and OUT Pins | 20V |
Key Features
- Enhanced EMI performance
- Integrated power FETs for up to 2A charge rate
- Synchronous fixed-frequency PWM controller operating at 1.1 MHz with 0% to 100% duty cycle
- High-accuracy voltage and current regulation
- Status outputs for LED or host processor interface indicating charge-in-progress, charge completion, fault, and AC-adapter present conditions
- Accurate high-side battery current sensing
- Battery temperature monitoring
- Automatic sleep mode for low power consumption
- Reverse leakage protection to prevent battery drainage
- Thermal shutdown and protection
- Built-in battery detection
Applications
The BQ24123RHLR is targeted at a wide range of portable applications, including but not limited to:
- Smartphones and tablets
- Laptops and notebooks
- Portable media players and gaming devices
- Wearable devices such as smartwatches and fitness trackers
- Other battery-powered portable electronics
Q & A
- What is the BQ24123RHLR?
The BQ24123RHLR is a highly integrated Li-ion and Li-polymer switched-mode battery charger from Texas Instruments.
- What package type does the BQ24123RHLR come in?
The BQ24123RHLR comes in a 20-pin VQFN (RHL) package.
- What is the maximum charge rate of the BQ24123RHLR?
The maximum charge rate of the BQ24123RHLR is up to 2A.
- What types of batteries does the BQ24123RHLR support?
The BQ24123RHLR supports 1-, 2-, or 3-cell Li-Ion and Li-Polymer battery packs.
- What is the operating frequency of the BQ24123RHLR?
The BQ24123RHLR operates at a fixed frequency of 1.1 MHz.
- Does the BQ24123RHLR have thermal protection?
Yes, the BQ24123RHLR includes thermal shutdown and protection features.
- How does the BQ24123RHLR manage power consumption when not in use?
The BQ24123RHLR automatically enters sleep mode when the VCC supply is removed to minimize power consumption.
- What kind of EMI performance does the BQ24123RHLR offer?
The BQ24123RHLR offers enhanced EMI performance.
- Does the BQ24123RHLR provide status outputs?
Yes, the BQ24123RHLR provides status outputs for LED or host processor interface indicating various charge and fault conditions.
- What is the absolute maximum voltage rating on the IN and OUT pins of the BQ24123RHLR?
The absolute maximum voltage rating on the IN and OUT pins is 20V.
