MAX77818
Dual Input, Power Path, 3A Switching Mode Charger with Fuel Gauge
Industry's Highest Efficiency Switching Mode Charger in a Smaller Solution Size in 3.87mm x 3.61mm WLP
Maxim Confidential 
MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
| Charging VIN (V) (max) | 14 |
| Max. ICHG (A) | 3 |
| Cell Chemistry | Li-Ion Li-Polymer |
| # Lithium Ion Cells | 1 |
| Protected VIN (V) (max) | 16 |
| Charger (V) | 3.65 to 4.7 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | WLP/72 |
| Budgetary Price (See Notes) | 2.05 |
| Functions | Charger Fuel Gauge |
| Battery Type | 1 Cell Li-Ion |
| Fuel Gauge Algorithm | ModelGauge m5 |
| Interface | 2-Wire |
| Parameters Measured | Current State of Charge Temperature Voltage |
| Applications | Host |
| VSUPPLY (V) (min) | 4 |
| VSUPPLY (V) (max) | 14 |
| Package/Pins | WLP/72 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | 2.05 |
Simplified Block Diagram
Technical Docs
| Data Sheet | Dual Input, Power Path, 3A Switching Mode Charger with Fuel Gauge | Apr 02, 2020 |
Design Solution: DS34-How to Make Your IoT Gadget Smaller and Cooler ›
How Medical Wearables Enhance Quality of Life
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
| Charging VIN (V) (max) | 14 |
| Max. ICHG (A) | 3 |
| Cell Chemistry | Li-Ion Li-Polymer |
| # Lithium Ion Cells | 1 |
| Protected VIN (V) (max) | 16 |
| Charger (V) | 3.65 to 4.7 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | WLP/72 |
| Budgetary Price (See Notes) | 2.05 |
| Functions | Charger Fuel Gauge |
| Battery Type | 1 Cell Li-Ion |
| Fuel Gauge Algorithm | ModelGauge m5 |
| Interface | 2-Wire |
| Parameters Measured | Current State of Charge Temperature Voltage |
| Applications | Host |
| VSUPPLY (V) (min) | 4 |
| VSUPPLY (V) (max) | 14 |
| Package/Pins | WLP/72 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | 2.05 |
Key Features
- 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/Uses
- Bluetooth Headsets
- Handheld Devices
- Industrial PCs
- Internet of Things (IoT)
- Portable Medical Devices
- Smart Home Automation, Sensors
- Wearable, Smart Watches
- Wireless Speakers
Description
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.
Technical Docs
| Data Sheet | Dual Input, Power Path, 3A Switching Mode Charger with Fuel Gauge | Apr 02, 2020 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Request a Quote