Overview
The Texas Instruments BQ29700DSET is a battery cell protection device designed to provide accurate monitoring and trigger thresholds for overcurrent protection during high discharge/charge current operations or battery overcharge conditions. This device is specifically tailored for protecting Li-ion and Li-polymer cells, ensuring safe and reliable battery management. It features low current consumption in NORMAL mode operation, making it suitable for a variety of portable and handheld applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 6-pin WSON (1.50mm × 1.50mm × 0.75mm) |
| Operating Temperature Range | -40°C to 85°C |
| Input Voltage Range (Pack+) | VSS – 0.3V to 12V |
| FET Drive Outputs | CHG and DSG FET drive outputs |
| Voltage Sensing Accuracy | ±5mV (typical) across external FETs |
| Current Consumption in NORMAL Mode | ICC = 4µA |
| Current Consumption in Shutdown Mode | Iq = 100nA |
| Thermal Resistance (Junction to Ambient) | 190.5 °C/W (for DSE package) |
Key Features
- Overcharge detection (OVP) and over-discharge detection (UVP)
- Charge overcurrent detection (OCC) and discharge overcurrent detection (OCD)
- Load short-circuit detection (SCP)
- Zero voltage charging for depleted batteries
- Factory-programmed fault protection thresholds, fault detection voltage thresholds, fault trigger timers, and fault recovery timers
- FET drive outputs for charge and discharge FETs
- Voltage sensing across external FETs for overcurrent protection
- Low current consumption in NORMAL mode and shutdown mode
Applications
The BQ29700DSET is suitable for a variety of applications, including mobile handsets, handheld data terminals, and other portable electronic devices that require reliable and efficient battery management. Its features make it an ideal choice for any system needing robust protection for Li-ion and Li-polymer battery cells.
Q & A
- What is the primary function of the BQ29700DSET?
The primary function of the BQ29700DSET is to provide accurate monitoring and trigger thresholds for overcurrent protection during high discharge/charge current operations or battery overcharge conditions for Li-ion and Li-polymer cells. - What is the operating temperature range of the BQ29700DSET?
The operating temperature range is -40°C to 85°C. - What is the input voltage range for the BQ29700DSET?
The input voltage range is VSS – 0.3V to 12V. - Does the BQ29700DSET support zero voltage charging?
Yes, it supports zero voltage charging for depleted batteries. - What are the key protection features of the BQ29700DSET?
The key protection features include overcharge detection (OVP), over-discharge detection (UVP), charge overcurrent detection (OCC), discharge overcurrent detection (OCD), and load short-circuit detection (SCP). - How much current does the BQ29700DSET consume in NORMAL mode?
The current consumption in NORMAL mode is ICC = 4µA. - What is the package type and size of the BQ29700DSET?
The package type is 6-pin WSON, and the size is 1.50mm × 1.50mm × 0.75mm. - Is the BQ29700DSET RoHS compliant?
Yes, the BQ29700DSET is RoHS compliant. - What are the typical applications for the BQ29700DSET?
The typical applications include mobile handsets, handheld data terminals, and other portable electronic devices. - How does the BQ29700DSET handle fault recovery?
The device has factory-programmed fault protection thresholds, fault detection voltage thresholds, fault trigger timers, and fault recovery timers. The recovery timer starts as soon as the fault is triggered, and the device checks for recovery conditions after the timer expires.
