TI BQ296223DSGR

The BQ296xxx series is a high-precision, low-power overvoltage protector with a regulated output power supply of 2 mA suitable for lithium-ion battery pack applications. This device can individually monitor the overvoltage condition of each cell in a 2 - 4 cell series battery pack. When an overvoltage condition is detected on any cell, an internal fixed-delay timer is activated. After the delay timer expires, the output pin is triggered to an active state to indicate an overvoltage condition. The regulated output power supply can provide a maximum output current of 2 mA (max) to drive always-on circuits, such as a real-time clock (RTC) oscillator. The BQ296xxx series has a self-disable function that can turn off the regulated output when the voltage of any cell is below a specific threshold, thereby preventing battery depletion. The device can also enable or disable the regulated output through external control.

• 2-cell, 3-cell, and 4-cell series battery OVP
• Fixed delay timer for FET drive output triggering (4 options: 3s, 4s, 5.5s, or 6.5s)
• Factory-preset OVP thresholds (threshold voltage range: 3.85V to 4.6V)
• Output option: active high
• High-accuracy OVP: ±10mV
• Regulated power output with self-disable and/or external enable/disable control
• Options: 3.3V, 2.5V, and 1.8V (BQ2961)
• Options: 3.3V, 3.15V, 3.0V (BQ2962)
• Low-power ICC ~4μA (VCELL(ALL) < VPROTECT)
• Ultra-low power consumption with regulated output disabled, ICC ~1.2μA
• Low leakage current per cell input < 100nA
• Small package footprint
• 8-pin WSON (2mm×2mm)

• Laptop
• Ultrabook
• Medical
• UPS Backup Battery