Overview
The BQ24105IRHLRQ1 is a highly integrated Li-ion and Li-polymer switch-mode charge management IC produced by Texas Instruments. It is part of the bqSWITCHER™ series, designed for highly efficient charger designs in various portable applications. This device features an integrated synchronous PWM controller and power FETs, offering high-accuracy voltage and current regulation, charge preconditioning, charge status, and charge termination. It is suitable for single-, two-, or three-cell Li-ion and Li-polymer battery packs, as well as LiFePO4 batteries.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range (IN, VCC) | 0 to 20 | V |
| Charge Current Range | 150 to 2000 | mA |
| Current Regulation Accuracy | -10% to 10% | % |
| Voltage Regulation Accuracy | -0.5% to 0.5% | % |
| PWM Frequency | 1.1 MHz | Hz |
| Cycle-by-Cycle Current Limit | 2.6 to 4.5 | A |
| Thermal Shutdown Temperature | 165 °C | °C |
| Package Type | 20-Pin QFN | - |
| Operating Temperature Range | -40 to 85 | °C |
Key Features
- Integrated synchronous PWM controller operating at 1.1 MHz with 0% to 100% duty cycle
- Integrated power FETs for up to 2-A charge rate
- High-accuracy voltage and current regulation
- Charge preconditioning, charge status, and charge termination
- Battery temperature monitoring and charge suspend based on temperature
- Automatic sleep mode for low power consumption
- Reverse leakage protection and thermal shutdown
- Status outputs for LED or host processor interface indicating charge-in-progress, charge completion, fault, and AC-adapter present conditions
- Available in a 20-pin, 3.5 mm × 4.5 mm QFN package
Applications
- Handheld products
- Portable media players
- Industrial and medical equipment
- Portable equipment
- Automotive applications
Q & A
- What is the BQ24105IRHLRQ1 used for?
The BQ24105IRHLRQ1 is used for Li-ion and Li-polymer battery charge management in various portable and automotive applications.
- What is the operating frequency of the PWM controller in the BQ24105IRHLRQ1?
The PWM controller operates at a fixed frequency of 1.1 MHz.
- What is the maximum charge current supported by the BQ24105IRHLRQ1?
The device supports a maximum charge current of up to 2 A.
- How does the BQ24105IRHLRQ1 manage battery temperature?
The device monitors battery temperature using an external NTC thermistor and suspends charging if the temperature exceeds the set thresholds.
- What are the key safety features of the BQ24105IRHLRQ1?
The device includes features such as thermal shutdown, reverse leakage protection, and cycle-by-cycle current limiting to ensure safe operation.
- How does the BQ24105IRHLRQ1 indicate charge status?
The device provides status outputs for indicating charge-in-progress, charge completion, fault conditions, and AC-adapter presence.
- What is the package type and size of the BQ24105IRHLRQ1?
The device is available in a 20-pin QFN package measuring 3.5 mm × 4.5 mm.
- Can the BQ24105IRHLRQ1 be used for LiFePO4 batteries?
- What is the operating temperature range of the BQ24105IRHLRQ1?
The device operates over a temperature range of -40°C to 85°C.
- How does the BQ24105IRHLRQ1 enter sleep mode?
The device enters sleep mode when the VCC supply is removed to conserve power.
