BQ2947 Series

Lithium-ion protection for accurate cell-by-cell voltage monitoring

Link to Manufacturer Page: https://www.ti.com/

Catalog

Lithium-ion protection for accurate cell-by-cell voltage monitoring

Part	Operating Temperature [Max]	Operating Temperature [Min]	Function	Mounting Type	Supplier Device Package	Package / Case	Number of Cells [Max] [custom]	Number of Cells [Min] [custom]	Battery Chemistry
Texas Instruments BQ294702DSGT	110 °C	-40 °C	Battery Protection	Surface Mount	8-WSON (2x2)	8-WFDFN Exposed Pad	4	2	Lithium Ion
Texas Instruments BQ294701DSGT	110 °C	-40 °C	Battery Protection	Surface Mount	8-WSON (2x2)	8-WFDFN Exposed Pad	4	2	Lithium Ion
Texas Instruments BQ294704DSGR	110 °C	-40 °C	Battery Protection	Surface Mount	8-WSON (2x2)	8-WFDFN Exposed Pad	4	2	Lithium Ion
Texas Instruments BQ294704DSGT	110 °C	-40 °C	Battery Protection	Surface Mount	8-WSON (2x2)	8-WFDFN Exposed Pad	4	2	Lithium Ion
Texas Instruments BQ294702DSGR	110 °C	-40 °C	Battery Protection	Surface Mount	8-WSON (2x2)	8-WFDFN Exposed Pad	4	2	Lithium Ion
Texas Instruments BQ294703DSGT	110 °C	-40 °C	Battery Protection	Surface Mount	8-WSON (2x2)	8-WFDFN Exposed Pad	4	2	Lithium Ion
Texas Instruments BQ294703DSGR	110 °C	-40 °C	Battery Protection	Surface Mount	8-WSON (2x2)	8-WFDFN Exposed Pad	4	2	Lithium Ion
Texas Instruments BQ294700DSGR	110 °C	-40 °C	Battery Protection	Surface Mount	8-WSON (2x2)	8-WFDFN Exposed Pad	4	2	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

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.