The 33772 is a SMARTMOS lithium ion Battery Cell Controller IC designed for automotive applications, such as hybrid electric (HEV) and electric vehicles (EV) along with industrial applications, such as energy storage systems (ESS), and uninterruptible power supply (UPS) systems. The device performs ADC conversions of the differential cell voltages and current, as well as battery Coulomb counting and battery temperature measurements. The information is digitally transmitted through SPI or transformer isolation to a microcontroller for processing.

Features

•5.0 V ≤ VPWR ≤ 30 V operation, 40 V transient

•3 to 6 cells management

•Isolated 2.0 Mbps differential communication or 4.0 Mbps SPI

•Addressable on initialization

•Synchronized cell voltage/current measurement with Coulomb count

•Total stack voltage measurement

•Seven GPIO/temperature sensor inputs

•5.0 V at 5.0 mA reference supply output

•Automatic over/undervoltage & temperature detection routable to fault pin

•Integrated Sleep mode over/undervoltage & temperature monitoring

•Onboard 300 mA passive cell balancing with diagnostics

•Hot plug capable

•Detection of internal and external faults, as open lines, shorts, and leakages

•Single chip ASIL C capable

•Fully compatible with the MC33771 for max 14 cells

Applications

•Automotive: 12 V and high-voltage battery packs

•E-bikes, e-scooters

•Energy storage systems

•Uninterruptible power supply (UPS)