MAX17332 Battery Internal Self-Discharge Detection IC

ADI’s MAX17332 is a 35 μA I_Q standalone charger, fuel gauge, protector, and battery internal self-discharge detection IC for 1-cell lithium-ion/polymer batteries. When a voltage source is present, the IC regulates charging by modulating the charge N-FET using AccuCharge charger technology. The IC regulates charge voltage, current, and FET temperature. Standalone charging is supported by flexible configuration in nonvolatile memory.

The IC ideal diode circuit supports a quick response to system transients and adapter removal with low voltage drop across the CHG FET.

The IC uses the ModelGauge m5 EZ algorithm that combines the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge to provide industry-leading accuracy. The IC automatically compensates for cell aging, temperature, and discharge rate while providing accurate state-of-charge (SOC) in milliampere-hours (mAh) or percentage (%) over a wide range of operating conditions.

The IC monitors the voltage, current, temperature, and state of the battery to provide protection against over/undervoltage, overcurrent, short-circuit, over/under temperature, and overcharge conditions, and internal self-discharge protection using external high-side N-FETs to ensure that the lithium-ion/polymer battery operates under safe conditions which prolongs the life of the battery.

The MAX17332X2EVKIT# evaluation kit (EV kit) is a fully assembled and tested surface-mount PCB that evaluates the standalone charger, fuel gauge IC with protector, and optional SHA-256 authentication for 1-cell lithium-ion/polymer batteries.