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
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.
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
| 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 @1k |
Technical Docs
| Data Sheet | Dual Input, Power Path, 3A Switching Mode Charger with Fuel Gauge | Apr 02, 2020 |
Click any title below to view the detail page where available.
Design Solution: DS34-How to Make Your IoT Gadget Smaller and Cooler ›
How Medical Wearables Enhance Quality of LifeDescription
The MAX77818 evaluation system (EV system) consists of a MAX77818 evaluation kit (EV kit) and a companion Maxim MINIQUSB interface board.
The MAX77818 EV kit is an assembled and tested PC board that demonstrates the MAX77818. The IC contains 12V input and 3A output switching mode charger.
The Maxim MINIQUSB interface board allows an IBM- compatible PC to use its USB port to emulate an I2C 2-wire interface. Windows XP®/Windows® 7 software provides a user-friendly interface to exercise the features of the MAX77818. The menu-driven program offers a graphical user interface with control buttons.
View DetailsFeatures
- Demonstrates 12VCHGIN, 3A Charge
- Demonstrates m5 Fuel Gauge Performance
- Demonstrates Dual Input Charge
- Demonstrates OTG Mode
- Evaluates MAX77818 Detail Performances
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 @1k |
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