Description
●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.
●Features
●• 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
●Applications
●• Uninterruptible Power Systems (UPS)
●• E-Bike and E-Scooter
●• Large-Format Battery Systems
