Overview
The BQ24012DRCRG4, part of the bqTINY™ series from Texas Instruments, is a highly integrated linear charger designed for single-cell Li-Ion and Li-Polymer batteries. This device is ideal for low-dropout designs and supports regulated and unregulated power supplies. It features a range of functionalities including temperature sensing, power good indication, charge enable, and timer and termination control. The BQ24012DRCRG4 is suitable for various portable electronic devices due to its compact QFN-10 package and robust charging capabilities.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage | 4.5 | - | 24 | V |
| Charge Voltage | 4.2 | - | 4.2 | V |
| Charge Current (Max) | - | - | 1 | A |
| Dropout Voltage (V(IN) - V(OUT)) | 650 | 790 | - | mV |
| Voltage Regulation Accuracy | -0.5% | - | 0.5% | % |
| Power-On Reset Threshold Voltage | 2.25 | 2.5 | 2.75 | V |
| Thermal Shutdown Temperature | - | - | 155 | °C |
| Package Type | - | - | QFN-10 | - |
Key Features
- Temperature Sensing: Includes a temperature sense input to detect hot or cold battery packs.
- Power Good Indication: Provides a power good (PG) output indicating the presence of valid input power.
- Charge Enable and Timer Control: Features a TTL-level charge-enable input (CE) and a TTL-level timer and termination enable input (TTE) for controlling the charge process.
- Short-Circuit Protection: Offers protection against short-circuit conditions.
- Thermal Shutdown and Protection: Suspends charging if the junction temperature exceeds 155°C and resumes when it falls below approximately 130°C.
- RoHS Compliance: Compliant with RoHS regulations.
Applications
- Cellular Phones
- PDAs
- MP3 Players
- Digital Cameras
- Internet Appliances
Q & A
- What is the maximum charge current of the BQ24012DRCRG4?
The maximum charge current is 1 A. - What are the supported charge voltages for the BQ24012DRCRG4?
The supported charge voltage is 4.2 V. - What is the input voltage range for the BQ24012DRCRG4?
The input voltage range is from 4.5 V to 24 V. - Does the BQ24012DRCRG4 have thermal shutdown protection?
Yes, it suspends charging if the junction temperature exceeds 155°C and resumes when it falls below approximately 130°C. - What is the package type of the BQ24012DRCRG4?
The package type is QFN-10. - Is the BQ24012DRCRG4 RoHS compliant?
Yes, it is RoHS compliant. - How does the charge enable input (CE) function?
A low-level signal on the CE pin enables the charge, and a high-level signal disables it. A high-to-low transition on this pin also resets all timers and fault conditions and starts a new charge cycle. - What is the purpose of the timer and termination enable input (TTE)?
The TTE input is used to disable or enable the fast-charge timer and charge termination. A low-level signal enables the fast-charge timer and termination, while a high-level signal disables this feature. - How does the power good (PG) output function?
The PG output indicates the presence of valid input power. - What are some common applications for the BQ24012DRCRG4?
Common applications include cellular phones, PDAs, MP3 players, digital cameras, and internet appliances.
