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ACT8945A PDF даташит
| Спецификация ACT8945A изготовлена «Active-Semi» и имеет функцию, называемую «Advanced PMU». |
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Детали детали
| Номер произв | ACT8945A |
| Описание | Advanced PMU |
| Производители | Active-Semi |
| логотип |  |
30 Pages
No Preview Available ! |
ACT8945A
Rev 2, 11-Feb-14
Advanced PMU for Atmel SAMA5D3 Series & SAM9 Series Processors
FEATURES
• Three Step-Down DC/DC Converters
• Four Low-Dropout Linear Regulators
• Integrated ActivePathTM Charger
• I2CTM Serial Interface
• Advanced Enable/Disable Sequencing Controller
• Minimal External Components
• Tiny 5×5mm TQFN55-40 Package
− 0.75mm Package Height
− Pb-Free and RoHS Compliant
GENERAL DESCRIPTION
The ACT8945A is a complete, cost effective, highly-
efficient ActivePMUTM power management solution,
optimized for the unique power, voltage-
sequencing, and control requirements of the Atmel
SAMA5D3 series: SAMA5D[31/33/34/35/36], and Atmel
SAM9 series: SAM9G[15/25/35/45/46], SAM9X[25/35],
SAM9M[10/11], SAM9N[11/12] processors. It is ideal
for a wide range of high performance portable handheld
applications such as human-machine interfaces, control
panels, smart grid infrastructures, network gateways,
M2M systems, 2D barcode scanners, barcode printers,
machine vision equipment, as well as home and
commercial building automations, POS terminals,
medical devices and white goods. This device
integrates the ActivePathTM complete battery charging
and management system with seven power supply
channels.
This device features three step-down DC/DC
converters and four low-noise, low-dropout linear
regulators, along with a complete battery charging
solution featuring the advanced ActivePathTM
system-power selection function.
The three DC/DC converters utilize a high-
efficiency, fixed-frequency (2MHz), current-mode
PWM control architecture that requires a minimum
number of external components. Two DC/DCs are
capable of supplying up to 1100mA of output
current, while the third supports up to 1200mA. All
four low-dropout linear regulators are high-
performance, low-noise regulators that supply up to
320mA of output current.
The ACT8945A is available in a compact, Pb-Free
and RoHS-compliant TQFN55-40 package.
TYPICAL APPLICATION DIAGRAM
CHGIN
ACT8945A
Li+ Battery
+
TH
Atmel
SAMA5Dx
PUSH BUTTON
ISET
ActivePathTM Charger
Control
nSTAT
CHARGE
STA TUS
nPBIN
REG1 1.8V
REG2 1.2V
REG3 3.3V
REG4
REG5
REG6
REG7
SDA
SCL
1150mA
1150mA
1300mA
320mA
320mA
320mA
320mA
VDDIODDR etc.
VDDCORE_GBIT ENET etc.
VDDIOP etc.
VDDFUSE
VDDANA
Auxiliary 1
Auxiliary 1
TWD
TWCK
nRSTO
nIRQ
nPBSTAT
NRST
FIQ/IRQ
GPIO
Innovative PowerTM
Active-Semi Proprietary―For Authorized Recipients and Customers
ActivePMUTM and ActivePathTM are trademarks of Active-Semi.
I2CTM is a trademark of NXP.
-1-
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.
Free Datasheet http://www.Datasheet4U.com
No Preview Available ! |
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
ActivePathTM 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
ActivePathTM 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
Innovative PowerTM
Active-Semi Proprietary―For Authorized Recipients and Customers
ActivePMUTM and ActivePathTM are trademarks of Active-Semi.
I2CTM is a trademark of NXP.
-2-
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.
Free Datasheet http://www.Datasheet4U.com
No Preview Available ! |
ACT8945A
Rev 2, 11-Feb-14
FUNCTIONAL BLOCK DIAGRAM
(Optional)
AC Adaptor
USB
4.35V to 6V CHGIN
ACIN
VSYS
nSTAT
BO DY
SWITCH
ActivePath
Control
CHGLEV
ISET
OUT1
nRSTO
nPBIN
PUSH BUTTON
VIO
nPBSTAT
VIO
nIRQ
VSYS
PWRHLD
VSEL
SCL
BAT SDA
LBI
VSYS
nLBO
-
1.2V +
REFBP
Refe r ence
ACT8945A
VSYS System Supply
BO DY
SWITCH
CHARGE STATUS
Charge
Control
CURRENT SENSE
VOLTAGE SENSE
PRE-
CONDITION
2.85V
THERMA L
REGUL ATION
110°C
102µA
System
Control
REG4
LDO
REG5
LDO
REG6
LDO
REG7
LDO
BAT Li+ Battery
+
TH
VP1
SW1
OUT1
GP12
VP2
SW2
OUT2
GP12
VP3
SW3
OUT3
GP3
INL
OUT4
OUT5
OUT6
OUT7
To VSYS
OUT1
To VSYS
OUT2
To VSYS
OUT3
To VSYS
OUT4
OUT5
OUT6
OUT7
GA EP
Innovative PowerTM
Active-Semi Proprietary―For Authorized Recipients and Customers
ActivePMUTM and ActivePathTM are trademarks of Active-Semi.
I2CTM is a trademark of NXP.
-3-
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.
Free Datasheet http://www.Datasheet4U.com
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| Номер в каталоге | Описание | Производители |
| ACT8945A | Advanced PMU | Active-Semi |
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