Overview
The BQ24314DSGT from Texas Instruments is a highly integrated circuit designed to provide comprehensive protection for Li-ion battery charging systems. This IC monitors and protects against input overvoltage, overcurrent, and battery overvoltage conditions, ensuring the safety and reliability of the charging circuit. It is particularly suited for use in mobile devices, such as mobile phones, smartphones, PDAs, MP3 players, and low-power handheld devices.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage (IN with respect to VSS) | -0.3 | 30 | V | |
| Output Voltage (OUT with respect to VSS) | -0.3 | 12 | V | |
| Input Current (IN) | 2 | A | ||
| Output Current (OUT) | 2 | A | ||
| Input Overvoltage Protection Threshold (VOVP) | 5.71 | 5.85 | 6 | V |
| Input Overcurrent Protection Threshold (IOCP) | 300 | 1000 | 1500 | mA |
| Battery Overvoltage Protection Threshold (BVOVP) | 4.30 | 4.35 | 4.4 | V |
| Thermal Shutdown Temperature (TJ(OFF)) | 140 | 150 | °C | |
| Operating Current (IDD) | 400 | 600 | μA | |
| Standby Current (ISTDBY) | 65 | 95 | μA |
Key Features
- Provides protection for three variables: input overvoltage, user-programmable overcurrent, and battery overvoltage.
- Rapid response to input overvoltage in less than 1 μs.
- Supports up to 1.5-A input current and 30-V maximum input voltage.
- Robust against false triggering due to current transients.
- Thermal shutdown to prevent overheating.
- Enable input and status indication for fault conditions.
- Available in space-saving 8-pin and 12-pin SON packages.
Applications
- Mobile phones and smartphones.
- PDAs.
- MP3 players.
- Low-power handheld devices.
- Bluetooth headsets.
Q & A
- What is the primary function of the BQ24314DSGT IC?
The primary function is to provide protection to Li-ion battery charging systems against input overvoltage, overcurrent, and battery overvoltage conditions. - What is the maximum input voltage the BQ24314DSGT can handle?
The maximum input voltage is 30 V. - How does the IC protect against input overvoltage?
The IC turns off an internal switch to remove power from the charging circuit if the input voltage exceeds the overvoltage protection threshold. - What is the range of the input overcurrent protection threshold?
The input overcurrent protection threshold ranges from 300 mA to 1500 mA. - How does the IC protect against thermal issues?
The IC has a thermal shutdown feature that switches off the device if the die temperature exceeds 150°C. - What are the typical applications of the BQ24314DSGT?
Typical applications include mobile phones, smartphones, PDAs, MP3 players, and low-power handheld devices. - What is the purpose of the FAULT pin?
The FAULT pin indicates fault conditions such as overvoltage, overcurrent, or thermal shutdown. - Can the BQ24314DSGT be controlled by a processor?
Yes, the IC can be controlled by a processor through the enable input (CE) and provides status information about fault conditions. - What are the available package options for the BQ24314DSGT?
The IC is available in 8-pin and 12-pin SON packages. - How does the IC handle power-up and power-down conditions?
The IC has a power-on reset feature and remains in power-down mode when the input voltage is below the undervoltage threshold.
