The MP2787DFP-0000 from Monolithic Power Systems is a Multi-Cell Battery Monitoring IC that is ideal for power and gardening tools, e-bikes, e-scooters, battery backups, uninterruptible power supply (UPS), and energy storage applications. It requires an input voltage of 18-75.2 V and an input current of 23 µA. This battery management IC (BMIC) is designed for analog front-end (AFE) monitoring and monitors battery packs consisting of 7 cells all the way up to 16 cells connected in series. It incorporates a dual analog-to-digital (ADC) converter architecture where the first ADC measures differential cell voltage, die temperature of each channel (up to 16 channels) with an error of less than 5 mV and temperatures of 4 channels via an external negative temperature coefficient (NTC) thermistor. The other ADC measures the charge/discharge current or can count charge in coulombs with an error of ±0.5%. The two ADCs synchronously measure both the voltage and current, enabling impedance monitoring of cells and packs. 

This BMIC includes I²C and SPI interfaces for communicating with the host, along with an 8-bit cyclic redundancy check (CRC) error check mechanism that ensures error-free transfer of the data. It provides robust hardware monitoring alarm functions such as over-current interrupt, battery under-voltage interrupt, over-voltage interrupt, and low-high temperature interrupts. This monitoring IC also has internal passive balancing MOSFETs to help equalize mismatched cells. It can also drive external balancing transistors (e.g. BJT or MOSFET). This IC is available in a surface-mount package that measures 7 x 7 mm.