BQ7791501 Series
3-series to 5-series stackable ultra-low-power primary protector with autonomous cell balancing
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
3-series to 5-series stackable ultra-low-power primary protector with autonomous cell balancing
| Part | Operating Temperature [Max] | Operating Temperature [Min] | Function | Mounting Type | Battery Chemistry | Number of Cells [Max] | Number of Cells [Min] | Package / Case [y] | Package / Case [y] | Package / Case | Supplier Device Package | Fault Protection |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ7791501PWR | 85 °C | -40 °C | Battery Protection | Surface Mount | Lithium Ion/Polymer | 5 | 3 | 4.4 mm | 0.173 " | 24-TSSOP | 24-TSSOP | Over Current, Over Temperature, Over/Under Voltage, Short Circuit |
Key Features
• Ultra-low quiescent current: 8 µA typ. (NORMAL mode), 2 µA (HIBERNATE mode)Full suite of voltage, current, and temperature protectionsSmart passive cell balancing removes cell-to-cell imbalanceScalable cell count from 3 series to 20 series or moreVoltage protection (accuracy ±10 mV for OV, ±18 mV for UV)Overvoltage: 3 V to 4.575 VUndervoltage: 1.2 V to 3 VOpen cell and open-wire detection (OW)Current protectionOvercurrent discharge 1: –10 mV to –85 mVOvercurrent discharge 2: –20 mV to –170 mVShort-circuit discharge: –40 mV to –340 mVTemperature protectionOvertemperature charge: 45°C or 50°COvertemperature discharge: 65°C or 70°CAdditional features:Independent charge (CHG) and discharge (DSG) FET driversSmart cell balancing algorithm with integrated FETs (up to 50-mA balancing current), also supports external FETs for higher cell-balancing currentUltra-low power HIBERNATE modeHigh 36-V absolute maximum rating per cell inputResistor programmable overcurrent (OCD1/2) delaySHUTDOWN mode: 0.5-µA maximumFunctional Safety-CapableDocumentation available to aid functional safety system designUltra-low quiescent current: 8 µA typ. (NORMAL mode), 2 µA (HIBERNATE mode)Full suite of voltage, current, and temperature protectionsSmart passive cell balancing removes cell-to-cell imbalanceScalable cell count from 3 series to 20 series or moreVoltage protection (accuracy ±10 mV for OV, ±18 mV for UV)Overvoltage: 3 V to 4.575 VUndervoltage: 1.2 V to 3 VOpen cell and open-wire detection (OW)Current protectionOvercurrent discharge 1: –10 mV to –85 mVOvercurrent discharge 2: –20 mV to –170 mVShort-circuit discharge: –40 mV to –340 mVTemperature protectionOvertemperature charge: 45°C or 50°COvertemperature discharge: 65°C or 70°CAdditional features:Independent charge (CHG) and discharge (DSG) FET driversSmart cell balancing algorithm with integrated FETs (up to 50-mA balancing current), also supports external FETs for higher cell-balancing currentUltra-low power HIBERNATE modeHigh 36-V absolute maximum rating per cell inputResistor programmable overcurrent (OCD1/2) delaySHUTDOWN mode: 0.5-µA maximumFunctional Safety-CapableDocumentation available to aid functional safety system design
Description
AI
The BQ77915 device is a low-power battery pack protector that implements a suite of voltage, current, and temperature protections and a smart cell balancing algorithm without microcontroller (MCU) control. The device’s stackable interface provides simple scaling to support battery cell applications from 3 series to 20 series or more. Protection thresholds and delays are factory-programmed and available in a variety of configurations. Separate overtemperature and undertemperature thresholds for discharge (OTD and UTD) and charge (OTC and UTC) provide additional flexibility.
The BQ77915 device is a low-power battery pack protector that implements a suite of voltage, current, and temperature protections and a smart cell balancing algorithm without microcontroller (MCU) control. The device’s stackable interface provides simple scaling to support battery cell applications from 3 series to 20 series or more. Protection thresholds and delays are factory-programmed and available in a variety of configurations. Separate overtemperature and undertemperature thresholds for discharge (OTD and UTD) and charge (OTC and UTC) provide additional flexibility.