Overview
The BQ24315DSGR is a highly integrated overvoltage and overcurrent protection IC designed by Texas Instruments. This component is specifically tailored to protect Li-ion batteries from failures in the charging circuit. It continuously monitors the input voltage, input current, and battery voltage, ensuring robust protection against various fault conditions. The IC features a rapid response to input overvoltage, user-programmable overcurrent protection, and battery overvoltage protection. It also includes thermal shutdown and status indication for fault conditions, making it a comprehensive solution for battery management in portable devices.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | WSON-8 | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Maximum Input Voltage | 30 | V |
| Maximum Input Current | 1.5 | A |
| Input Overvoltage Protection Threshold | 5.71 to 6.00 | V |
| Input Overcurrent Protection Threshold | 300 to 1500 | mA |
| Battery Overvoltage Protection Threshold | 4.30 to 4.4 | V |
| Thermal Shutdown Temperature | 140 to 150 | °C |
| LDO Mode Voltage Regulation | 5.3 to 5.7 | V |
Key Features
- Provides protection for three variables: input overvoltage, user-programmable overcurrent with current limiting, and battery overvoltage.
- Rapid response to input overvoltage in less than 1 µs.
- Supports up to 1.5A input current and 30V maximum input voltage.
- Robust against false triggering due to current transients.
- Thermal shutdown at 140°C.
- Enable input and status indication for fault conditions.
- 5.5V LDO mode voltage regulation.
- Available in a space-saving 8-lead 2mm × 2mm SON package.
Applications
- Mobile phones and smartphones.
- PDAs.
- MP3 players.
- Low-power handheld devices.
- Bluetooth headsets.
Q & A
- What is the primary function of the BQ24315DSGR?
The BQ24315DSGR is designed to provide protection to Li-ion batteries from failures in the charging circuit by monitoring input voltage, input current, and battery voltage.
- What is the maximum input voltage the BQ24315DSGR can handle?
The maximum input voltage is 30V.
- How does the BQ24315DSGR respond to input overvoltage conditions?
The IC immediately removes power from the charging circuit by turning off an internal switch if an input overvoltage condition occurs.
- Can the overcurrent threshold be adjusted?
- What is the thermal shutdown temperature of the BQ24315DSGR?
The thermal shutdown temperature is between 140°C to 150°C.
- What type of package does the BQ24315DSGR come in?
The BQ24315DSGR is available in a WSON-8 package.
- What are some common applications for the BQ24315DSGR?
Common applications include mobile phones, smartphones, PDAs, MP3 players, low-power handheld devices, and Bluetooth headsets.
- How does the BQ24315DSGR protect against battery overvoltage?
The IC monitors the battery voltage and switches off if it exceeds the battery overvoltage protection threshold (4.30 to 4.4V).
- Can the BQ24315DSGR be controlled by a processor?
- What is the purpose of the LDO mode voltage regulation in the BQ24315DSGR?
The LDO mode voltage regulation ensures that the output voltage is regulated to a specific value (5.3 to 5.7V) for inputs between the regulation voltage and the overvoltage threshold.
