Li-ion administration IC for batteries as much as 25V
Referred to as L9961, its “built-in options embrace a twin pre-driver for controlling battery-pack security relays, which will be programmed for high-side and low-side connection”, stated ST. “An embedded non-volatile reminiscence for configuration information relieves the microcontroller from reprogramming the gadget at every start-up. An I2C interface handles configuration and host communication to share battery state-of-charge and state-of-health.”
By an ADC and current-sense amplifier, cell voltages are measured to ±15mV, and battery present to 0.25%. By these, passive cell balancing and coulomb counting will be applied.
Protections embrace over-voltage, under-voltage, steadiness under-voltage, over-current, and short-circuit-in-discharge.
With an elective thermistor, safety will be prolonged to pack over and under-temperature, and there’s programmable output designed to blow a security fuse through an elective exterior n-mosfet if sure circumstances, labeled as everlasting failures, come up.
Sizzling plugging is supported.
Two power-saving modes reduce the consumption – to 2μA in deep sleep and 5μA in stand-by.
A 3.3 V regulator is out there for supplying exterior circuitry in each stand-by and regular operation modes.
Packaging is 5 x 5 x 1mm 32pad VFQFPN.
For extra info, the L9961 product net web page will be discovered on line right here
