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特性
- 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
产品详情和应用
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.
