EVK-ACT8945AQJ303-T Datasheet, PDF (2/42 Pages) Active-Semi, Inc – Advanced PMU for Atmel SAMA5D3 Series & SAM9 Series Processors

ACT8945A
Rev 2, 11-Feb-14
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
ActivePath^TM Charger Electrical Characteristics..........................................................................................p. 18
Typical Performance Characteristics...........................................................................................................p. 20
System Control Information .........................................................................................................................p. 26
Control Signals .................................................................................................................................p. 27
Push-Button Control.........................................................................................................................p. 27
Control Sequences...........................................................................................................................p. 28
Functional Description .................................................................................................................................p. 29
I²C Interface .....................................................................................................................................p. 29
Voltage Monitor and Interrupt...........................................................................................................p. 29
Thermal Shutdown ...........................................................................................................................p. 30
Step-Down DC/DC Regulators ....................................................................................................................p. 31
General Description..........................................................................................................................p. 31
100% Duty Cycle Operation.............................................................................................................p. 31
Synchronous Rectification................................................................................................................p. 31
Soft-Start ..........................................................................................................................................p. 31
Compensation ..................................................................................................................................p. 31
Configuration Options.......................................................................................................................p. 31
OK[ ] and Output Fault Interrupt.......................................................................................................p. 32
PCB Layout Considerations .............................................................................................................p. 32
Low-Noise, Low-Dropout Linear Regulators................................................................................................p. 33
General Description..........................................................................................................................p. 33
Output Current Limit .........................................................................................................................p. 33
Compensation ..................................................................................................................................p. 33
Configuration Options.......................................................................................................................p. 33
OK[ ] and Output Fault Interrupt.......................................................................................................p. 33
PCB Layout Considerations .............................................................................................................p. 33
ActivePath^TM Charger ..................................................................................................................................p. 35
General Description..........................................................................................................................p. 35
ActivePath Architecture ....................................................................................................................p. 35
System Configuration Optimization..................................................................................................p. 35
Input Protection ................................................................................................................................p. 35
Battery Management ........................................................................................................................p. 35
Charge Current Programming..........................................................................................................p. 36
Charger Input Interrupts ...................................................................................................................p. 36
Charge-Control State Machine.........................................................................................................p. 38
State Machine Interrupts ..................................................................................................................p. 38
Thermal Regulation ..........................................................................................................................p. 39
Charge Safety Timers ......................................................................................................................p. 39
Charger Timer Interrupts ..................................................................................................................p. 39
Charge Status Indicator....................................................................................................................p. 39
Reverse-Current Protection .............................................................................................................p. 39
Battery Temperature Monitoring ......................................................................................................p. 39
Battery Temperature Interrupts ........................................................................................................p. 40
TQFN55-40 Package Outline and Dimensions ...........................................................................................p. 41
Revision History...........................................................................................................................................p. 42
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I²C^TM is a trademark of NXP.
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