BQ76PL536A

• 3-to-6 Series Cell Support, All Chemistries
• Hot-Pluggable
• High-Speed Serial Peripheral Interface (SPI) for Data Communications
• Stackable Vertical Interface
• Isolation Components not Required Between Devices
• Industrial Temperature Range –40°C to 85°C
• High-Accuracy Analog-to-Digital Converter (ADC):
  • ±1 mV Typical Accuracy
  • 14-Bit Resolution, 6-µs Conversion Time
  • Nine ADC Inputs: 6 Cell Voltages, 1 Six-Cell Brick Voltage, 2 Temperatures, 1 General-Purpose Input
  • Dedicated Pins for Synchronizing Measurements
• Configuration Data Stored in Error Check/Correct (ECC)-One-Time-Programmable (OTP) Registers
• Built-In Comparators (Secondary Protector) for:
  • Overvoltage and Undervoltage Protection
  • Overtemperature Protection
  • Programmable Thresholds and Delay Times
  • Dedicated Fault Output Signals
• Cell Balancing Control Outputs With Safety Timeout
  • Balance Current Set by External Components
• Supply Voltage Range from 6 V to 30 V Continuous and 36-V Peak
• Low Power:
  • Typical 12-µA Sleep, 45-µA Idle
• Integrated Precision 5-V, 3-mA LDO

The bq76PL536A device is a stackable battery monitor and protector for three-to-six lithium-ion cells in series. The bq76PL536A integrates an analog front end (AFE) along with a precision analog-to-digital converter (ADC), used to precisely measure battery cell voltages. A separate ADC is used to measure temperature.

In addition to temperature measurement, overvoltage and undervoltage are monitored per channel for protection. Non-volatile memory stores the user-programmable protection thresholds and delay times. A FAULT output signals whenever one of these thresholds is exceeded.

Cell stacks of 192 cells can be supported by stacked bq76PL536A devices. A high-speed SPI interface connects all devices.