ACT3780QY-T [ACTIVE-SEMI]
ActivePath™ Battery Charger; ActivePath ™电池充电器
| 型号： | ACT3780QY-T |
| 厂家： | 
ACTIVE-SEMI, INC |
| 描述： | ActivePath™ Battery Charger |
| 文件： | 总2页 (文件大小：142K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ACT3780
Product Brief, 29-May-08
Active- Semi
Advanced Information―All Information Subject to Change
ActivePathTM Battery Charger
FEATURES
GENERAL DESCRIPTION
• ActivePathTM System Power Selection of Best
The ACT3780 is a complete battery charging and
management solution for one cell Lithium-Ion or Lith-
ium-Polymer battery. The ACT3780 incorporates the
ActivePath architecture which automatically selects
the best available input supply for the system.
Available Input Supply
• 40mΩ Battery Switch for Highest Efficiency
• Dynamic Control of Charging Current Allowing
System to Draw Maximum Load from AC/USB
Input
When an external power source such as an AC
adapter or a USB port is connected in, the ACT3780
regulates the system voltage to 4.8V in addition to
providing charging current to the battery. If the exter-
nal 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.
• ±0.5% Battery Voltage Accuracy
• Up to 12V Input
• Thermal Regulation for Charge Control
• Charge Status Outputs for LED or System
Interface
• Battery Voltage Level Indication
The ACT3780 charger is a complete, thermally
regulated, stand-alone single cell linear Li+ charger
that integrates an internal power 12V MOSFET. The
battery regulation voltage is ±0.5% accurate, and is
factory programmed from 4.2V (other voltages avail-
able upon request).
• Programmable Fast Charge Current
• Programmable Charging Timer
• Low Reverse Leakage Current
• Short-Circuit and Thermal Protection
• Preconditioning for Deeply Depleted Battery
• Low Quiescent Current Standby Mode
The ACT3780 is available in an thermally enhanced
4mm x 4mm Thin-QFN and 3.5mm × 4.5mm Thin-
DFN 20-pin packages.
• Space-Saving, Thermally-Enhanced TQFN44-20
or TDFN3545-20 Packages
APPLICATIONS
• Personal Navigation Devices
• Smart Mobile Phones
• Blue-Tooth Devices
• Portable Media Players
• Portable Devices
SIMPLIFIED APPLICATION CIRCUIT
AC Adapter/USB
CHG_IN
To SYSTEM
SYS
Pb
Pb-free
Li-ion Battery
+
BAT
STAT1
STAT2
ISET
ACT3780
TM
ActivePath
Innovative PowerTM
ActivePathTM is a trademark of Active-Semi.
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www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
ACT3780
Active- Semi
Product Brief, 29-May-08
ORDERING INFORMATIONcd
BATTERY
VOLTAGE
SYSTEM
VOLTAGE
TEMPERATURE
PART NUMBER
PACKAGE
PINS
RANGE
ACT3780QY-T
ACT3780NY-T
4.2V
4.2V
4.6V
TQFN44-20
20
20
-40°C to 85°C
-40°C to 85°C
4.6V
TDFN3545-20
c: Battery and system voltage options detailed in this table represent standard voltage options, and are available for samples or pro-
duction orders. Contact Active-Semi for more information regarding semi-custom output voltage combinations.
d: All Active-Semi components are RoHS Compliant and with Pb-free plating unless specified differently. The term Pb-free means
semiconductor products that are in compliance with current RoHS (Restriction of Hazardous Substances) standards.
FUNCTIONAL BLOCK DIAGRAM
Active- Semi
Body
Control
ACT3780
CHG_IN
SYS
BAT
+
–
DC
Body
Control
CHGLEV
EN
+
-
CURRENT SENSE
VOLTAGE SENSE
ACIN
TH
REF
BLV1
BLV2
System and
Charger Control
ISET
nACOK
STAT3
STAT2
DCCC
BTR
STAT1
GA
THERMAL
REGULATION
110°C
Innovative PowerTM
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www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
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