Gehäuseinformationen
| Gehäuse | Pins TSSOP (PW) | 24 |
| Betriebstemperaturbereich (°C) -40 to 85 |
| Gehäusemenge | Träger 2.000 | LARGE T&R |
Merkmale von BQ77915
- Ultra-low quiescent current: 8 µA typ. (NORMAL mode), 2 µA (HIBERNATE mode)
- Full suite of voltage, current, and temperature protections
- Smart passive cell balancing removes cell-to-cell imbalance
- Scalable cell count from 3 series to 20 series or more
- Voltage protection (accuracy ±10
mV for OV, ±18 mV for UV)
- Overvoltage: 3 V to 4.575 V
- Undervoltage: 1.2 V to 3 V
- Open cell and open-wire detection (OW)
- Current protection
- Overcurrent discharge 1: –10 mV to –85 mV
- Overcurrent discharge 2: –20 mV to –170 mV
- Short-circuit discharge: –40 mV to –340 mV
- Temperature protection
- Overtemperature charge: 45°C or 50°C
- Overtemperature discharge: 65°C or 70°C
- Additional features:
- Independent charge (CHG) and discharge (DSG) FET drivers
- Smart cell balancing algorithm with integrated FETs (up to 50-mA balancing current), also supports external FETs for higher cell-balancing current
- Ultra-low power HIBERNATE mode
- High 36-V absolute maximum rating per cell input
- Resistor programmable overcurrent (OCD1/2) delay
- SHUTDOWN mode: 0.5-µA maximum
- Functional Safety-Capable
Beschreibung von BQ77915
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.