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ACT8945A の電気的特性と機能

ACT8945AのメーカーはActive-Semiです、この部品の機能は「Advanced PMU」です。


製品の詳細 ( Datasheet PDF )

部品番号
ACT8945A
部品説明
Advanced PMU
メーカ
Active-Semi
ロゴ

Active-Semi ロゴ 




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ACT8945A Datasheet, ACT8945A PDF,ピン配置, 機能
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 ProprietaryFor 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

1 Page





ACT8945A pdf, ピン配列
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 ProprietaryFor 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


3Pages


ACT8945A 電子部品, 半導体
ACT8945A
Rev 2, 11-Feb-14
PIN DESCRIPTIONS CONT’D
PIN NAME
DESCRIPTION
23
ISET
Charge Current Set. Program the charge current by connecting a resistor (RISET) between ISET
and GA. See the Charge Current Programming section for more information.
24
25
26
27
28
29, 30
31, 32
33
TH
Temperature Sensing Input. Connect to battery thermistor. TH is pulled up with a 102µA (typ) current
internally. See the Battery Temperature Monitoring section for more information.
VSEL
SCL
SDA
nSTAT
BAT
VSYS
Step-Down DC/DCs Output Voltage Selection. Drive to logic low to select default output voltage.
Drive to logic high to select secondary output voltage. See the Output Voltage Programming
section for more information.
Clock Input for I2C Serial Interface.
Data Input for I2C Serial Interface. Data is read on the rising edge of SCL.
Active-Low Open-Drain Charger Status Output. nSTAT has a 8mA (typ) current limit, allowing it
to directly drive an indicator LED without additional external components. See the Charge Status
Indicator section for more information.
Battery Charger Output. Connect this pin directly to the battery anode (+ terminal)
System Output Pin. Bypass to GA with a 10µF or larger ceramic capacitor.
CHGIN
Power Input for the Battery Charger. Bypass CHGIN to GA with a capacitor placed as close to
the IC as possible.
34 OUT2 Output Feedback Sense for REG2.
35
VP2
Power Input for REG2. Bypass to GP12 with a high quality ceramic capacitor placed as close to
the IC as possible.
36 SW2 Switching Node Output for REG2.
37
GP12
Power Ground for REG1 and REG2. Connect GA, GP12 and GP3 together at a single point as
close to the IC as possible.
38 SW1 Switching Node Output for REG1.
39
VP1
Power Input for REG1. Bypass to GP12 with a high quality ceramic capacitor placed as close to
the IC as possible.
40 NC2 No Connect. Not internally connected.
EP EP Exposed Pad. Must be soldered to ground on PCB.
Innovative PowerTM
Active-Semi ProprietaryFor Authorized Recipients and Customers
ActivePMUTM and ActivePathTM are trademarks of Active-Semi.
I2CTM is a trademark of NXP.
-6-
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.
Free Datasheet http://www.Datasheet4U.com

6 Page

合計 : 30 ページ
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部品番号部品説明メーカ
ACT8945A

Advanced PMU

Active-Semi
Active-Semi

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