Battery Monitoring Li-Ion 3.3V 38-Pin TSSOP

The MAX11080 are battery-pack fault-monitor ICs capable of monitoring up to 12 lithium-ion (Li+) battery cells. This device is designed to provide an overvoltage or under voltage fault indication when any of the cells cross the user-selectable threshold for longer than the set program-delay interval. The over voltage levels are pin selectable from +3.3V to +4.8V in 100mV increments, and have a guaranteed accuracy of ±25mV over the entire temperature range. The under voltage level is also user selectable from +1.6V to +2.8V in 200mV increments. These levels are guaranteed to ±100mV over the entire temperature range. Under voltage detection can be disabled as one of the user-configuration options. The MAX11080 have a built-in level-shifter that allows up to 31 MAX11080 devices to be connected in a daisy-chain fashion to reduce the number of interface signals needed for large stacks of series batteries. Each cell is monitored differentially and compared to the overvoltage and under voltage thresholds. When any of the cells exceed this threshold for longer than the set program delay interval, the MAX11080 inhibit the heartbeat signal from being passed down the daisy-chain. Built-in comparator hysteresis prevents threshold chattering. The MAX11080 is designed to be the perfect complement to the MAX11068 high-voltage measurement IC for redundant fault-monitoring applications. This device is offered in a 9.7mm x 4.4mm, 38-pin TSSOP package with 0.5mm pin spacing.Extended operating temperature range of -40°C to +105°C.

• Up to 12-Cell Li+ Battery Voltage Fault Detection
• Operation from 6.0V to 72V
• Pin-Selectable Overvoltage Threshold from +3.3V to +4.8V in 100mV Increments
  • ±25mV Overvoltage-Detection Accuracy
• Pin-Selectable Under voltage Threshold from
  • +1.6V to +2.8V in 200mV Increments
  • ±100mV Under voltage-Detection Accuracy
• Overvoltage/Under voltage-Threshold Detection Hysteresis 300mV
• Programmable Delay Time of Alarm Detection from 3.0ms to 3.32s with an External Capacitor
• Daisy-Chained Alarm and Shutdown Functions with Heartbeat Status Signal
  • Up to 31 Devices Can Be Connected
• Ultra-Low-Power Dissipation
  • Operating-Mode Current Drain: 80µA
  • Shutdown-Mode Current: 2µA
• Wide Operating Temperature Range from -40°C to +105°C (AEC-Q100, Type 2)
• 9.7mm x 4.4mm, 38-Pin TSSOP Package
• Lead(Pb)-Free and RoHS Compliant