MAX77972 datasheet(2/171 Pages) AD

2 / 171 page

MAX77972

AccuCharge + ModelGauge 1-Cell Fuel Gauge

and 3A Charger with Integrated USB Type-C

Detection

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Analog Devices | 2

TABLE OF CONTENTS

General Description ............................................................................................................................................................1

Applications.........................................................................................................................................................................1

Benefits and Features.........................................................................................................................................................1

Simplified Block Diagram ....................................................................................................................................................1

Absolute Maximum Ratings ...............................................................................................................................................5

Package Information ...........................................................................................................................................................6

Electrical Characteristics.....................................................................................................................................................7

Typical Operating Characteristics .....................................................................................................................................15

Pin Configurations.............................................................................................................................................................18

Pin Descriptions ................................................................................................................................................................18

Functional Diagram...........................................................................................................................................................20

Detailed Description..........................................................................................................................................................21

Buck Charger ................................................................................................................................................................21

Charging Control........................................................................................................................................................21

INIT State ......................................................................................................................................................................22

BUCK State................................................................................................................................................................24

PRECHARGE State...................................................................................................................................................24

TRICKLE CHARGE State..........................................................................................................................................24

FAST CHARGE - STEP CHARGING ........................................................................................................................25

FAST CHARGE - JEITA ............................................................................................................................................27

TOP-OFF State..........................................................................................................................................................29

CHARGE DONE/FULL State.....................................................................................................................................30

Charging Indicators Input Status (INOKB).................................................................................................................30

Charge Status Output (STAT)....................................................................................................................................30

Charger Interrupt (ALRT)...........................................................................................................................................30

ICHG/VCHG Resistor Configured Charging ..............................................................................................................30

Charger Operation Modes.............................................................................................................................................33

Smart Power Selector ...................................................................................................................................................34

Input Current Limit.........................................................................................................................................................34

Adaptive Input Current Limiting Loop (AICL).................................................................................................................34

Thermal Foldback..........................................................................................................................................................35

Reduced Charge Current ..............................................................................................................................................35

OTG and Reverse Boost Mode .....................................................................................................................................36

Input Self Discharge ......................................................................................................................................................36

Charger Protections ......................................................................................................................................................36

Charge Timer Fault....................................................................................................................................................36

Watchdog Timer.........................................................................................................................................................37

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