ACT8945AQJ405-T データシートの表示（PDF） - Active-Semi, Inc

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ACT8945AQJ405-T

Advanced PMU for Atmel SAMA5Dx Series & SAM9 Series Processors

Active-Semi, Inc 

ACT8945A

Rev 6, 01-Feb-16

TABLE OF CONTENTS

General Information .....................................................................................................................................p. 01

Functional Block Diagram............................................................................................................................p. 04

Ordering Information....................................................................................................................................p. 05

Pin Configuration .........................................................................................................................................p. 05

Pin Descriptions...........................................................................................................................................p. 06

Absolute Maximum Ratings .........................................................................................................................p. 08

I2C Interface Electrical Characteristics ........................................................................................................p. 09

Global Register Map ....................................................................................................................................p. 10

Register and Bit Descriptions ......................................................................................................................p. 11

System Control Electrical Characteristics....................................................................................................p. 16

Step-Down DC/DC Electrical Characteristics ..............................................................................................p. 17

Low-Noise LDO Electrical Characteristics...................................................................................................p. 18

ActivePathTM Charger Electrical Characteristics..........................................................................................p. 19

Typical Performance Characteristics...........................................................................................................p. 21

System Control Information .........................................................................................................................p. 27

Interfacing with the Atmel SAMA5D2, SAMA5D3 Series & SAM9 Series Processors ....................p. 27

Control Signals .................................................................................................................................p. 28

Push-Button Control.........................................................................................................................p. 28

Control Sequences...........................................................................................................................p. 29

Functional Description .................................................................................................................................p. 30

I2C Interface .....................................................................................................................................p. 30

Voltage Monitor and Interrupt...........................................................................................................p. 30

Thermal Shutdown ...........................................................................................................................p. 31

Step-Down DC/DC Regulators ....................................................................................................................p. 32

General Description..........................................................................................................................p. 32

100% Duty Cycle Operation.............................................................................................................p. 32

Synchronous Rectification................................................................................................................p. 32

Soft-Start ..........................................................................................................................................p. 32

Compensation ..................................................................................................................................p. 32

Configuration Options.......................................................................................................................p. 32

OK[ ] and Output Fault Interrupt.......................................................................................................p. 33

PCB Layout Considerations .............................................................................................................p. 33

Low-Noise, Low-Dropout Linear Regulators................................................................................................p. 34

General Description..........................................................................................................................p. 34

Output Current Limit .........................................................................................................................p. 34

Compensation ..................................................................................................................................p. 34

Configuration Options.......................................................................................................................p. 34

OK[ ] and Output Fault Interrupt.......................................................................................................p. 34

PCB Layout Considerations .............................................................................................................p. 34

ActivePathTM Charger ..................................................................................................................................p. 36

General Description..........................................................................................................................p. 36

ActivePath Architecture ....................................................................................................................p. 36

System Configuration Optimization..................................................................................................p. 36

Input Protection ................................................................................................................................p. 36

Battery Management ........................................................................................................................p. 36

Charge Current Programming..........................................................................................................p. 37

Charger Input Interrupts ...................................................................................................................p. 37

Charge-Control State Machine.........................................................................................................p. 39

State Machine Interrupts ..................................................................................................................p. 39

Thermal Regulation ..........................................................................................................................p. 40

Charge Safety Timers ......................................................................................................................p. 40

Charger Timer Interrupts ..................................................................................................................p. 40

Charge Status Indicator....................................................................................................................p. 40

Reverse-Current Protection .............................................................................................................p. 40

Battery Temperature Monitoring ......................................................................................................p. 40

Battery Temperature Interrupts ........................................................................................................p. 41

ActivePMUTM and ActivePathTM are trademarks of Active-Semi.

I2CTM is a trademark of NXP.

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