BQ7721606PWR

The BQ77216 product series offers a variety of voltage and temperature monitoring functions, including overvoltage (OVP), undervoltage (UVP), open - circuit (OW), and over - temperature (OT) protection for lithium - ion battery pack systems. It can independently monitor each battery cell for overvoltage, undervoltage, and open - circuit conditions. By adding an external NTC thermistor, the device can detect over - temperature conditions. When an overvoltage, undervoltage, open - circuit, or over - temperature condition is detected, the BQ77216 device activates an internal delay timer. When the delay timer expires, the corresponding output is triggered to enter its operating state (either high or low level depending on the configuration). If an overvoltage fault is detected, the COUT pin is triggered. If an undervoltage fault is detected, the DOUT pin is triggered. If an over - temperature or open - circuit fault is detected, both the DOUT and COUT pins are triggered. To enable faster product line testing, the BQ77216 device offers a customer test mode (CTM) with significantly reduced delay times.

Applications

• Li-ion battery pack protection, applicable to:
• Handheld garden tools
• Handheld power tools
• Cordless vacuum cleaners
• UPS backup batteries
• Light electric vehicles (e-bikes, electric scooters, pedal-assist bicycles)

Key features

• High-accuracy overvoltage protection for 3S to 16S series battery packs
• ±10mV at 25°C
• ±20mV from 0°C to 60°C
• Overvoltage protection options from 3.55V to 5.1V
• Undervoltage protection options from 1.0V to 3.5V
• Open-wire connection detection
• Overtemperature protection
• Supports random battery connection order
• Functional safety support
• Fixed internal delay timer
• Fixed detection threshold
• Fixed output drive type for each COUT and DOUT
• Active-high or active-low
• Active-high drive up to 6V
• Open-drain, externally pullable to VDD
• Low-power ICC ≈ 1μA (VCELL(ALL) < VOV)
• Low leakage current < 100nA per cell input with open-wire detection disabled
• Package option: 24-pin leaded TSSOP with 0.65mm lead pitch