The MAX77818EWZ+ 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.
Feature
- 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
Applications
- Bluetooth Headsets
- Handheld Devices
- Industrial PCs
- Internet of Things (IoT)
- Portable Medical Devices
- Smart Home Automation, Sensors
- Wearable, Smart Watches
- Wireless Speakers
