BQ294704 Series
Lithium-ion protection for accurate cell-by-cell voltage monitoring
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Lithium-ion protection for accurate cell-by-cell voltage monitoring
| Part | Package / Case | Function | Number of Cells [Max] [custom] | Number of Cells [Min] [custom] | Operating Temperature [Max] | Operating Temperature [Min] | Mounting Type | Supplier Device Package | Battery Chemistry |
|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ294704DSGR | 8-WFDFN Exposed Pad | Battery Protection | 4 | 2 | 110 °C | -40 °C | Surface Mount | 8-WSON (2x2) | Lithium Ion |
Texas Instruments BQ294704DSGT | 8-WFDFN Exposed Pad | Battery Protection | 4 | 2 | 110 °C | -40 °C | Surface Mount | 8-WSON (2x2) | Lithium Ion |
Key Features
• 2-, 3-, and 4-series cell overvoltage protectionExternal capacitor-programmed delay timerFactory programmed OVP threshold (threshold range 3.85 V to 4.6 V)Output options: active high or open drain active lowHigh-accuracy overvoltage protection: ±10 mVLow power consumption ICC≈ 1 µA (VCELL(ALL)< VPROTECT)Low leakage current per cell input < 100 nASmall package footprint8-pin WSON (2.00 mm x 2.00 mm)2-, 3-, and 4-series cell overvoltage protectionExternal capacitor-programmed delay timerFactory programmed OVP threshold (threshold range 3.85 V to 4.6 V)Output options: active high or open drain active lowHigh-accuracy overvoltage protection: ±10 mVLow power consumption ICC≈ 1 µA (VCELL(ALL)< VPROTECT)Low leakage current per cell input < 100 nASmall package footprint8-pin WSON (2.00 mm x 2.00 mm)
Description
AI
The BQ2947 family is an overvoltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition.
In the BQ2947 device, an external delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, the output is triggered into its active state (either high or low, depending on the configuration). The external delay timer feature also includes the ability to detect an open or shorted delay capacitor on the CD pin, which will similarly trigger the output driver in an overvoltage condition.
For quicker production-line testing, the BQ2947 device provides a Customer Test Mode with 67 reduced delay time.
The BQ2947 family is an overvoltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition.
In the BQ2947 device, an external delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, the output is triggered into its active state (either high or low, depending on the configuration). The external delay timer feature also includes the ability to detect an open or shorted delay capacitor on the CD pin, which will similarly trigger the output driver in an overvoltage condition.
For quicker production-line testing, the BQ2947 device provides a Customer Test Mode with 67 reduced delay time.