Achieving nano I_Q in industrial BMS monitors

Many battery-powered products such as power tools and e-bikes are characterized by the need to balance functionality and I_Q in different power states. For example, a power tool in an active state (with the trigger pull on) may consume amperes of current, rendering the I_Q of the battery monitor used in the power tool negligible with respect to the rest of the system. However, this same battery-powered power tool may be sitting on a table for hours or days in sleep mode, with basic protection features enabled. The power tool should also have the ability to respond quickly to a trigger pull. In such a low-power state, the I_Q consumed by the BMS monitor becomes far more important.

By having a sleep mode that still has active protections; an enabled voltage regulator (to retain memory in the system microcontroller [MCU]); and duty-cycled voltage, current and temperature measurements through analog-to-digital converters, the system is still fully protected and ready to respond rapidly, while being able to cut power consumption by a factor of 10 or more relative to active mode. TI industrial monitors have a variety of sleep mode options, allowing you to choose whether to keep protections active (which lets you keep the discharge path enabled); the low-dropout regulator enabled (to allow the system MCU to retain memory and recover within microseconds instead of milliseconds); and duty-cycle options for voltage, current and temperature measurements for a safe, operational sleep mode that can be tailored to optimize power and performance.