Overview
The BQ24313DSGR, produced by Texas Instruments, is a highly integrated charger front-end protection IC designed to provide comprehensive protection for Li-ion batteries. This IC continuously monitors the input voltage, input current, and battery voltage to ensure safe and reliable charging operations. It features rapid response times for overvoltage and overcurrent conditions, as well as thermal protection and battery overvoltage protection. The device is controlled by a processor and provides status information about fault conditions, making it an essential component in various portable electronic devices.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | –0.3 to 30 | V |
| Output Voltage Range | –0.3 to 12 | V |
| Input Current | Up to 2 | A |
| Output Current | Up to 2 | A |
| Output Voltage Regulation (VO(REG)) | 5.67 to 6.03 | V |
| Input Overvoltage Protection Threshold (VOVP) | 10.2 to 10.8 | V |
| Input Overcurrent Protection Threshold (IOCP) | 300 to 1500 | mA |
| Battery Overvoltage Protection Threshold (BVOVP) | 4.30 to 4.4 | V |
| Thermal Shutdown Temperature | 140 | °C |
| Package Type | 8 Lead 2mm × 2mm SON |
Key Features
- Provides protection for input overvoltage, input overcurrent, and battery overvoltage with rapid response times (< 1 µs for OVP)
- User-programmable overcurrent threshold
- Thermal shutdown at 140°C
- Enable input and status indication for fault conditions
- Supports up to 1.5A input current and 30V maximum input voltage
- Low-power operation with standby current of 65-95 µA
- Soft-start feature to minimize inrush current
- Robust against false triggering due to current transients
Applications
- Mobile phones and smartphones
- PDAs
- MP3 players
- Low-power handheld devices
- Bluetooth headsets
Q & A
- What is the primary function of the BQ24313DSGR IC?
The primary function is to provide protection to Li-ion batteries from failures of the charging circuit by monitoring input voltage, input current, and battery voltage. - What is the maximum input voltage the BQ24313DSGR can handle?
The maximum input voltage is 30V. - How does the IC protect against 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?
Yes, the input overcurrent threshold is user-programmable. - What is the thermal shutdown temperature of the IC?
The thermal shutdown temperature is 140°C. - How does the IC indicate fault conditions?
The IC provides status information about fault conditions through the FAULT pin. - What is the typical standby current of the IC?
The typical standby current is 65-95 µA. - What types of devices typically use the BQ24313DSGR?
It is used in mobile phones, smartphones, PDAs, MP3 players, and low-power handheld devices. - How does the IC handle inrush current during power-on?
The IC has a soft-start feature to minimize inrush current and reduce ringing at the input. - What is the package type of the BQ24313DSGR?
The package type is an 8 Lead 2mm × 2mm SON.
