Dual Input, Power Path, 3A Switching Mode Charger with Fuel Gauge

The MAX77818 integrates a high-performance 3A switching charger and proprietary ModelGauge™ m5 fuel gauge in a space saving WLP package, ideal for USB powered portable devices. The smart power path charger supports two inputs with reverse blocking and USB On-the-Go (OTG), integrates all power switches, operates at high-switching frequency with high efficiency, enabling low heat designs with small external components. The ModelGauge m5 algorithm combines the excellent short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge, along with temperature compensation to provide industry-leading fuel-gauge accuracy. The device also integrates two high voltage input LDOs and is highly programmable with I2C interface.

Applications

* Bluetooth Headsets * Handheld Devices * Industrial PCs * Internet of Things (IoT) * Portable Medical Devices * Smart Home Automation, Sensors * Wearable, Smart Watches * Wireless Speakers

* Smart Power Path, Dual Input Switching Charger

* Up to 13.4V Operating/16V Withstand/4A (CHGIN)

* Up to 6V Operating/1.26A (WCIN)

* Reverse Leakage Blocking

* Reverse Boost with up to 5.1V/1.5A (OTG)

* Integrated Low-Loss FETs for 3A Charging/4.5A Discharging

* 95.6% Peak Efficiency at 5V/4.35V

* Full Feature Charger with Protection

* Thermal Regulation and JEITA Compliance

* ModelGauge m5 Fuel Gauge

* Time-to-Empty and Time-to-Full Prediction

* Accurate Battery Capacity (SOC) and Time-to-Empty Readings

* Temperature, Age, and Discharge Rate Compensated

* No Calibration

* Integrated FET Current Sensing

* Maintains Accuracy without Empty, Full, or Idle States

* Low Quiescent Current (IQ)

* Two High Voltage Input LDOs

* I2C Serial Interface

* 72-Bump, 3.867mm x 3.608mm, 0.4mm Pitch WLP