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PDF AAT3687 Data sheet ( Hoja de datos )
| Número de pieza | AAT3687 | |
| Descripción | Lithium-Ion/Polymer Battery Charger | |
| Fabricantes | AAT | |
| Logotipo |  |
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AAT3687
Lithium-Ion/Polymer Battery Charger
General Description
BatteryManager™
Features
The AAT3687 BatteryManager is a highly integrat-
• Input Voltage Range: 4.0V to 5.5V
ed single-cell lithium-ion/polymer battery charger
• Up to 1.5A 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 AAT3687 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 1.5A. 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-Temperature, and
Emergency Thermal 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 AAT3687 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
TS
AAT3687
CT
ADP
ADPSET
STAT1
GND
STAT2
RB1
RB2
CT
0.1μF
BATT+
COUT
10μF
BATT-
+
TEMP
Battery
Pack
LED2
3687.2006.10.1.7
1
1 page  
AAT3687
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 Units
Logic Control / Protection
VEN(H)
VEN(L)
IEN(H)
VADPP#
TC
Input High Threshold
Input Low Threshold
EN Input Current
Output Low Voltage
Preconditioning and Constant
Current Mode Time Out
1.6
AAT3687-1, AAT3687-2 Only;
VEN = 5V
ADPP# Pin Sinks 500μA
0.4
10
0.4
CCT = 100nF, VADP = 5.5V
3.0
V
V
μA
V
Hours
TP
TV
VSTAT
ISTAT
VOVP
ITK/ICHG
ITERM/ICHG
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
AAT3687, AAT3687-1 Only;
CCT = 100nF, VADP = 5.5V
CCT = 100nF, VADP = 5.5V
STAT Pin Sinks 4mA
AAT3687, AAT3687-1 Only
25 Minutes
3.0
0.4
8.0
4.4
10
Hours
V
mA
V
%
7.5 %
ITS Current Source from TS Pin
TS1 TS Hot Temperature Fault
Threshold
Hysteresis
70 80 90
310 330 350
15
μA
mV
TS2 TS Cold Temperature Fault
Threshold
Hysteresis
2.2 2.3 2.4
10
V
mV
IDATA
IADPP#
VDATA(H)
VDATA(L)
SQPULSE
tPERIOD
fDATA
TREG
TLOOP_IN
TLOOP_OUT
TOVSD
DATA Pin Sink Current
ADPP# Current Sink
Input High Threshold
Input Low Threshold
Status Request Pulse Width
System Clock Period
Data Output Frequency
Thermal Loop Regulation
Thermal Loop Entering Threshold
Thermal Loop Exiting Threshold
Over-Temperature Shutdown
Threshold
DATA Pin is Active Low State
ADPP# Pin is Active Low State
Status Request
3
1.6
200
8
50
20
90
110
85
145
0.4
mA
mA
V
V
ns
μs
kHz
°C
°C
°C
°C
1. The AAT3687 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.
3687.2006.10.1.7
5
5 Page 
System Operation Flow Chart
AAT3687
Lithium-Ion/Polymer Battery Charger
Output
ADPP
Yes
ADP
Voltage
ADP > VADPP
No
Yes
UVLO
VP > VUVLO
Yes
Switch
No
No Sleep
Mode
Power On
Reset
ADP
Loop
Enable
Thermal
Loop
Fault
Conditions Monitor
OV, OT
Yes No
Timing
Yes
Shut Down
Expire
Battery
Temperature Monitor
No
Battery
VTS1 < TS < VTS2
Temperature
No
Device
Temperature
Monitor
TJ > 110°C
Yes
Thermal Loop
Current
Reduction
Yes
(AAT3687)
Yes
No
Recharge Test
VRCH > VBAT
Preconditioning Test
VMIN > VBAT
Low Current
Conditioning
Charge
Safety Timer
Set
No
Yes
Current Phase Test
VEOC > VBAT
Current
Charging
Mode
No
Yes
Voltage Phase Test
IBAT > ITERM
No
Voltage
Charging
Mode
Charge
Completed
Application Information
Adapter Power Input
Constant current charge levels up to 1.5A may be
programmed by the user when powered from a suf-
ficient input power source. The AAT3687 will oper-
ate from the adapter input over a 4.0V to 5.5V
range.
The constant current fast charge current for the
adapter input is set by the RSET resistor connected
between the ADPSET and ground. Refer to Table 1
for recommended RSET values for a desired con-
stant current charge level. The presence of voltage
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
3687.2006.10.1.7
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet AAT3687.PDF ] | |
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