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ACT8828QJ1D2-T 参数 Datasheet PDF下载

ACT8828QJ1D2-T图片预览
型号: ACT8828QJ1D2-T
PDF下载: 下载PDF文件 查看货源
内容描述: 六通道ActivePathTM电源管理IC [Six Channel ActivePathTM Power Management IC]
分类和应用:
文件页数/大小: 49 页 / 634 K
品牌: ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
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Active-Semi
FEATURES
ActivePath
TM
Li+ Charger with System Power
Selection
ACT8828
Rev 3, 24-Sep-09
Six Channel
ActivePath
TM
Power Management IC
GENERAL DESCRIPTION
The patent-pending ACT8828 is a complete, cost
effective, highly-efficient
ActivePMU
TM
power
management solution that is ideal for a wide range of
high performance portable handheld applications such
as personal navigation devices (PNDs). This device
integrates the
ActivePath
complete battery charging
and management system with four power supply
channels.
The
ActivePath
architecture automatically selects the
best available input supply for the system. If the
external input source is not present or the system load
current is more than the input source can provide, the
ActivePath
supplies additional current from the battery
to the system. The charger is a complete, thermally-
regulated, stand-alone single-cell linear Li+ charger
that incorporates an internal power MOSFET.
REG1, REG2, and REG3 are three independent,
fixed-frequency, current-mode step-down DC/DC
converters that output 1.3A, 1.0A, and 0.55A,
respectively. REG4 is a fixed-frequency, step-up
DC/DC converter that safely and efficiently biases
strings of up to 7 white-LEDs (up to a total of 21
LEDs) for display backlight applications. Finally, an
I
2
C serial interface provides programmability for the
DC/DC converters.
The ACT8828 is available in a tiny 5mm × 5mm 40-
pin Thin-QFN package that is just 0.75mm thin.
Four Integrated Regulators:
1.3A High Efficiency Step-Down DC/DC
1.0A High Efficiency Step-Down DC/DC
0.55A High Efficiency Step-Down DC/DC
30V Step-Up DC/DC for up to 7s × 3p WLEDs
I
2
C
TM
Serial Interface
Minimal External Components
Compatible with USB or AC-Adapter Charging
5×5mm, Thin-QFN (TQFN55-40) Package
Only 0.75mm Height
RoHS Compliant
APPLICATIONS
Personal Navigation Devices
Portable Media Players
Smart Phones
SYSTEM BLOCK DIAGRAM
CHG_IN
CHGLEV
DCCC
ISET
ACIN
nSTAT
nPBIN
nIRQ
nRSTO
SCL
SDA
ON1
ON2
ON3
ON4
VSEL
System
Control
Li+ Battery
Programmable
Up to 1A
VSYS
REG1
Step-Down
DC/DC
REG2
Step-Down
DC/DC
REG3
Step-Down
DC/DC
REG4
Step-Up
DC/DC
OUT1
Adjustable, or
0.8V to 4.4V
Up to 1.3A
OUT2
Adjustable, or
0.8V to 4.4V
Up to 1.0A
OUT3
Adjustable, or
0.8V to 4.4V
Up to 0.55A
OUT4
Up to 30V
7s x 3p WLEDs
ActivePath
TM
&
Single-Cell Li+
Battery Charger
ACT8828
Active
PMU
TM
Innovative Power
TM
ActivePMU
and
ActivePath
are trademarks of Active-Semi.
I
2
C
TM
is a trademark of Philips Electronics.
TM
TM
-1-
www.active-semi.com
Copyright © 2009 Active-Semi, Inc.