ACT8933
Rev 3, 15-Nov-12
TABLE OF CONTENTS
General Information.....................................................................................................................................p. 01
Functional Block Diagram............................................................................................................................p. 03
Ordering Information....................................................................................................................................p. 04
Pin Configuration .........................................................................................................................................p. 04
Pin Descriptions...........................................................................................................................................p. 05
Absolute Maximum Ratings.........................................................................................................................p. 07
I2C Interface Electrical Characteristics ........................................................................................................p. 08
Global Register Map....................................................................................................................................p. 09
Register and Bit Descriptions ......................................................................................................................p. 10
System Control Electrical Characteristics....................................................................................................p. 15
Step-Down DC/DC Electrical Characteristics..............................................................................................p. 16
Low-Noise LDO Electrical Characteristics...................................................................................................p. 17
ActivePathTM Charger Electrical Characteristics..........................................................................................p. 18
Typical Performance Characteristics...........................................................................................................p. 20
System control information ..........................................................................................................................p. 27
Interfacing with the CoreLogic LUCY...............................................................................................p. 27
Control Signals.................................................................................................................................p. 28
Push-Button Control.........................................................................................................................p. 29
Control Sequences...........................................................................................................................p. 29
Functional Description .................................................................................................................................p. 31
I2C Interface .....................................................................................................................................p. 31
Voltage Monitor and Interrupt...........................................................................................................p. 31
Thermal Shutdown ...........................................................................................................................p. 32
Step-Down DC/DC Regulators ....................................................................................................................p. 33
General Description..........................................................................................................................p. 33
100% Duty Cycle Operation.............................................................................................................p. 33
Synchronous Rectification................................................................................................................p. 33
Soft-Start ..........................................................................................................................................p. 33
Compensation ..................................................................................................................................p. 33
Configuration Options.......................................................................................................................p. 33
OK[ ] and Output Fault Interrupt.......................................................................................................p. 34
PCB Layout Considerations.............................................................................................................p. 34
Low-Noise, Low-Dropout Linear Regulators................................................................................................p. 35
General Description..........................................................................................................................p. 35
Output Current Limit.........................................................................................................................p. 35
Compensation ..................................................................................................................................p. 35
Configuration Options.......................................................................................................................p. 35
OK[ ] and Output Fault Interrupt.......................................................................................................p. 35
PCB Layout Considerations.............................................................................................................p. 35
ActivePathTM Charger ..................................................................................................................................p. 37
General Description..........................................................................................................................p. 37
ActivePath Architecture....................................................................................................................p. 37
System Configuration Optimization..................................................................................................p. 37
Input Protection ................................................................................................................................p. 37
Battery Management........................................................................................................................p. 37
Charge Current Programming..........................................................................................................p. 38
Charger Input Interrupts ...................................................................................................................p. 38
Charge-Control State Machine.........................................................................................................p. 40
State Machine Interrupts..................................................................................................................p. 40
Thermal Regulation..........................................................................................................................p. 41
Charge Safety Timers ......................................................................................................................p. 41
Charger Timer Interrupts..................................................................................................................p. 41
Charge Status Indicator....................................................................................................................p. 41
Reverse-Current Protection .............................................................................................................p. 41
Battery Temperature Monitoring ......................................................................................................p. 41
Battery Temperature Interrupts........................................................................................................p. 42
TQFN55-40 Package Outline and Dimensions ...........................................................................................p. 43
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