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PDF AAT3697 Data sheet ( Hoja de datos )
| Número de pieza | AAT3697 | |
| Descripción | 2A Lithium-Ion/Polymer Battery Charger | |
| Fabricantes | AAT | |
| Logotipo |  |
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AAT3697
2A Lithium-Ion/Polymer Battery Charger
General Description
BatteryManager™
Features
The AAT3697 BatteryManager is a highly integrat-
• Input Voltage Range: 4.0V to 5.5V
ed single-cell lithium-ion/polymer battery charger
• Up to 2.0A Charging Current
IC designed to operate with AC adapter inputs. It
• Adapter Present Indicator (ADPP#)
requires a minimum number of external compo-
• High Level of Integration with Internal:
nents. The AAT3697 precisely regulates battery
— Charging Device
charge voltage and current for 4.2V lithium-
— Reverse Blocking Diode
ion/polymer battery cells. Adapter charge current
— Current Sensing
rates can be programmed up to 2.0A. An active
• Active Thermal Loop Charge Reduction
thermal management system regulates the fast
• Automatic Recharge Sequencing
charge constant current for all ambient tempera-
• Battery Temperature Monitoring
ture and input vs. output voltage conditions.
• Full Battery Charge Auto Turn-Off / Sleep Mode
Battery temperature and charge state are fully
monitored for fault conditions. In the event of an
over-voltage or over-temperature failure, the
device will automatically shut down, thus protecting
the charging device, control system, and the bat-
tery under charge. Status monitor output pins are
• Over-Voltage, Over-Current, and Over-
Temperature Protection
• Power On Reset and Soft Start
• Serial Interface Status Report
• 12-Pin 3x3mm TDFN Package
• -40°C to +85°C Temperature Range
provided to indicate the battery charge status by
directly driving two external LEDs. A serial interface
output is available to report 12 various charging
status states to a microcontroller.
Applications
www.DataSheet4U.com
The AAT3697 is available in a Pb-free, thermally-
•
enhanced, space-saving 12-pin TDFN 3x3mm
•
package and is rated over the -40°C to +85°C tem-
•
perature range.
•
•
•
Cellular Telephones
Digital Still Cameras
Hand Held PCs
MP3 Players
Personal Data Assistants (PDAs)
Other Lithium-Ion/Polymer Battery-Powered
Devices
Typical Application
Adapter
Present
Enable
Serial Interface
Adapter
CIN
10μF
RSET
LED1
ADPP#
BAT
EN
DATA
AAT3697 TS
CT
ADP
ADPSET
STAT1
GND
STAT2
RB1
RB2
VADP
RT1
BATT+
COUT
10μF
BATT-
+
CT
0.1μF
TEMP
RT2
Battery
Pack
LED2
3697.2007.02.1.1
1
1 page  
AAT3697
2A Lithium-Ion/Polymer Battery Charger
Electrical Characteristics1
VADP = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol Description
Conditions
Min Typ Max
Logic Control / Protection
VEN(H)
VEN(L)
VADPP#
TC
Input High Threshold
Input Low Threshold
Output Low Voltage
Preconditioning Plus Constant
Current Mode Time Out
ADPP# Pin Sinks 500μA
CCT = 100nF, VADP = 5.5V
1.6
0.4
0.4
3.0
TP
TV
VSTAT
ISTAT
VOVP
ITK/ICH
ITERM/ICH
Preconditioning Time Out
Constant Voltage Mode Time Out
Output Low Voltage
STAT Pin Current Sink Capability
Over-Voltage Protection Threshold
Pre-Charge Current
Charge Termination Threshold
Current
CCT = 100nF, VADP = 5.5V
CCT = 100nF, VADP = 5.5V
STAT Pin Sinks 4mA
25
3.0
0.4
8.0
4.4
10
7.5
VTS1
High Temperature Threshold
VADP = 5.5V
29.1 30 30.9
VTS2
Low Temperature Threshold
VADP = 5.5V
58.2 60 61.8
IDATA
DATA Pin Sink Current
DATA Pin is Active Low State
3
IADPP#
ADPP# Current Sink
ADPP# Pin is Active Low State
8
VDATA(H) Input High Threshold
1.6
VDATA(L) Input Low Threshold
0.4
SQPULSE Status Request Pulse Width
Status Request
200
tPERIOD System Clock Period
50
fDATA
Data Output Frequency
20
TREG
Thermal Loop Regulation
90
TLOOP_IN Thermal Loop Entering Threshold
110
TLOOP_OUT Thermal Loop Exiting Threshold
85
TOVSD
Over-Temperature Shutdown
Threshold
145
Units
V
V
V
Hour
Minute
Hour
V
mA
V
%
%
%VADP
%VADP
mA
mA
V
V
ns
μs
kHz
°C
°C
°C
°C
1. The AAT3697 output charge voltage is specified over the 0° to 70°C ambient temperature range; operation over the -40°C to +85°C
temperature range is guaranteed by design.
3697.2007.02.1.1
5
5 Page 
System Operation Flow Chart
AAT3697
2A Lithium-Ion/Polymer Battery Charger
Yes
ADP
Yes
No
No
Enable
Timing
No
Yes
Yes No
Expire
Yes
No
Yes Set
No
No
Yes
BAT_EOC
No
Yes
TERM
No
Application Information
Adapter Power Input
Constant current charge levels up to 2.0A may be
programmed by the user when powered from a suf-
ficient input power source. The AAT3697 will oper-
ate from the adapter input over a 4.0V to 5.5V
range.
3697.2007.02.1.1
The constant current fast charge current for the
adapter input is set by the RSET resistor connected
between the ADPSET pin and ground. Refer to
Table 1 for recommended RSET values for a desired
constant current charge level. The presence of volt-
age on the adapter input is indicated by the ADPP#
pin function. This indicator pin uses an internal open
drain device that will pull the ADPP# pin low when
voltage is detected on the ADP pin. The precise
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet AAT3697.PDF ] | |
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