MAX77972
RECOMMENDED FOR NEW DESIGNSAccuCharge + ModelGauge 1-Cell Fuel Gauge and 3A Charger with Integrated USB Type-C Detection
Industry’s Highest Accuracy Fuel Gauge integrated with USB-C Charger
- Part Models
- 2
- 1ku List Price
- Starting From $2.35
Overview
- Stand-Alone AccuCharge™ Buck Charger
- 13.7V Input Operating Voltage, up to 16V protection
- I2C or Resistor Configured Fast Charge Current 100mA to 3150mA
- I2C or Resistor Configured Charge Termination Voltage 3.4V to 4.66V
- I2C Programmable JEITA zones – 9 Automatic Temperature Charge Control Region
- Prequal and Step-Charging Options
- Fuel Gauge-Assisted Charge Termination
- 6A Peak Discharge Current
- OTG/Reverse Boost up to 5.1V, 1.5A
- Adaptive Input Current Limit (AICL)
- ModelGauge™ m5 EZ Algorithm
- Percent, Capacity, Age
- Cycle+™
- Precision Measurement Without Calibration
- Current, Voltage, Time, Cycles
- Die Temperature and Thermistors
- Integrated USB Detection
- CC Detection for USB Type-C
- BC1.2 Detection for Legacy SDP, DCP, and CDP
- Automatic Input Current Limit Configuration
- OCV Keep-Out Region for Special Chemistry Cell
The MAX77972 is an autonomous integrated FET charger with integrated fuel gauge, Universal Serial Bus (USB) Type-C and BC1.2 detection. The MAX77972 supports 4.5V to 13.7V inputs and up to 3.15A of charging current. Charge current and voltage are I2C and pin-configurable using resistors. The IC supports USB On-The-Go (OTG) reverse boost and includes a Smart Power Selector™ (SPS), which is best for using limited adapter and battery power.
The fuel gauge uses the ModelGauge™ m5 algorithm, which provides industry-leading accuracy by combining the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge. ModelGauge m5 automatically compensates for cell aging, temperature, and discharge rate and provides accurate state-of-charge (SOC) over a wide range of operating conditions.
Charging is coordinated with the fuel gauge to provide 9-temperature-region JEITA charge control as well as step-charging. Other protection features include junction thermal regulation, over/under voltage protection, and short circuit protection.
The USB Type-C Configuration Channel (CC) detection pins on the MAX77972 enable automatic USB Type-C power source detection and input current limit configuration. To support a variety of legacy USB types as well as proprietary adapters, the IC also integrates BC1.2 detection using the D+ and D- pins. The IC runs the CC pin and BC1.2 detection automatically as soon as a USB plug is inserted without any software control.
The IC is available in a lead-free 3.208mm x 3.258mm 36-bump 0.5mm pitch Wafer-level packaging (WLP) package.
Documentation
Data Sheet 1
User Guide 3
Webcast 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX77972EWX+ | WLCSP | ||
| MAX77972EWX+T | WLCSP |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Evaluation Software 1
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| MAX77818 | PRODUCTION | Dual Input, Power Path, 3A Switching Mode Charger with Fuel Gauge |
Evaluation Kits
Evaluation Kit for MAX77972
Resources
Software
Evaluation Kit for MAX77972