BQ76PL536 Datasheet PDF

●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