1 Features
• 3-series cell to 16-series cell protection
• High-accuracy over voltage protection
– ± 10 mV at 25°C
– ± 20 mV from 0°C to 60°C
• Overvoltage protection options from 3.55 V to
5.1 V
• Undervoltage protection with options from 1.0 V to
3.5 V
• Open-wire connection detection
• Overtemperature protection
• Random cell connection
• Functional safety-capable
• Fixed internal delay timers
• Fixed detections thresholds
• Fixed output drive type for each of COUT and
DOUT
– Active high or active low
– Active high drive to 6 V
– Open drain with ability to be pulled up
externally to VDD
• Low power consumption ICC ≈ 1 μA
(VCELL(ALL) < VOV)
• Low leakage current per cell input < 100 nA with
open wire detection disabled
• Package footprint options:
– Leaded 24-pin TSSOP with 0.65-mm lead pitch

2 Applications
• Protection for Li-ion battery packs used in:
– Handheld garden tools
– Handheld power tools
– Cordless vacuum cleaners
– UPS battery backup
– Light electric vehicles (eBike, eScooter, pedal
assist bicycles)

3 Description
The BQ77216 family of products provides a range
of voltage and temperature monitoring including
overvoltage (OVP), undervoltage (UVP), open wire
(OW), and overtemperature (OT) protection for Liion
battery pack systems. Each cell is monitored
independently for overvoltage, undervoltage, and
open-wire conditions. With the addition of an
external NTC thermistor, the device can detect
overtemperature conditions.
In the BQ77216 device, an internal delay timer
is initiated upon detection of an overvoltage,
undervoltage, open-wire, or overtemperature
condition. Upon expiration of the delay timer, the
respective output is triggered into its active state
(either high or low, depending on the configuration).