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PDF AAT3689 Data sheet ( Hoja de datos )
| Número de pieza | AAT3689 | |
| Descripción | USB Port/Adapter Lithium-Ion/Polymer Battery Charger | |
| Fabricantes | AAT | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AAT3689 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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AAT3689
0.5A/1.0A USB Port/Adapter
Lithium-Ion/Polymer Battery Charger
General Description
BatteryManager™
Features
The AAT3689 BatteryManager is a highly integrat-
• USB/AC Adapter System Power Charger
ed single cell lithium-ion/polymer battery charger
— USB: Programmable up to 500mA
IC designed to operate with USB port and AC
— Adapter: Programmable up to 1.0A
adapter inputs. It requires a minimum number of
• 4.0V to 5.5V Input Voltage Range
external components.
• Adapter Presence Automatically Disables
The AAT3689 precisely regulates battery charge
voltage and current for 4.2V lithium-ion/polymer bat-
tery cells. Adapter charge current rates may be pro-
grammed up to 1.0A. In the absence of an adapter
and with a USB port connected, the battery can also
be charged by USB power. The USB charge current
can be programmed up to 500mA. USB charging is
disabled when an adapter is present.
USB Charging
• High Level of Integration With Internal:
— Charging Devices
— Reverse Blocking Diodes
— Current Sensing
• Automatic Recharge Sequencing
• Battery Temperature Monitoring
• Full Battery Charge Auto Turn-Off
• Over-Current Protection
Battery temperature and charge state are fully
• Over-Voltage Protection
monitored for fault conditions. In the event of an
• Emergency Thermal Protection
over-voltage or over-temperature failure, the
• Power On Reset and Soft Start
device will automatically shut down, thus protecting
• 12-Pin 3x3 TDFN Package
the charging device, control system, and the bat-
tery under charge. Status monitor output pins are
provided to indicate the battery charge status by
Applications
directly driving two external LEDs.
www.DataSheet4U.com
The AAT3689 is available in a Pb-free, thermally-
enhanced, space-saving 12-pin 3x3mm TDFN
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
Enable
USB Input
USB
EN
BAT
BATT+
RSETUSB
USBSET
TS
AAT3689 CT
C2
10μF
BATT-
ADP Input
RSETADP
ADP
ADPSET
STAT1
GND
STAT2
CT
TEMP
Battery Pack
3689.2006.11.1.0
1
1 page  
AAT3689
0.5A/1.0A USB Port/Adapter
Lithium-Ion/Polymer Battery Charger
Electrical Characteristics1
VADP = 5V, TA = -25°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol Description
Conditions
Logic Control / Protection
VEN(H)
Input High Threshold (Adapter)
Input High Threshold (USB)
VEN(L)
IEN(H)
TP
TC
Input Low Threshold
EN Input Current
VEN = 5V
Preconditioning Time Out (ADP mode only) CCT = 100nF, VADP = 5.5V
Preconditioning and Constant Current Mode
Time Out (ADP mode only)
CCT = 100nF, VADP = 5.5V
TV
Constant Voltage Mode Time Out
(ADP mode only)
CCT = 100nF, VADP = 5.5V
VSTAT
ISTAT
VOVP
ITK/ICH
IOCP
ITERM/ICHG
ITS
TS1
Output Low Voltage
STAT Pin Current Sink Capability
Over-Voltage Protection Threshold
Pre-Charge Current
Over-Current Protection Threshold
Charge Termination Threshold Current
Current Source from TS Pin
TS Hot Temperature Fault
STAT Pin Sinks 4mA
Threshold
Hysteresis
TS2 TS Cold Temperature Fault
Threshold
Hysteresis
TOVSD Over-Temperature Shutdown Threshold
Min Typ Max Units
1.6
2.2
0.4
10
25
3.0
V
V
μA
Minute
Hour
3.0 Hour
0.4 V
8.0 mA
4.4 V
10 %
105
%ICHG_CC
7.5 %
70 80 90
μA
310 330 350
15
mV
2.2 2.3 2.4
V
10 mV
145 °C
1. The AAT3689 output charge voltage is specified over the 0° to 70°C ambient temperature range; operation over the -25°C to +85°C
temperature range is guaranteed by design.
3689.2006.11.1.0
5
5 Page 
AAT3689
0.5A/1.0A USB Port/Adapter
Lithium-Ion/Polymer Battery Charger
Charge Complete Voltage
Regulated Current
Preconditioning
Trickle Charge
Phase
Constant Current
Charge Phase
I = Max CC
Constant Voltage
Charge Phase
Constant Current Mode
Voltage Threshold
Trickle Charge and I = CC / 10
Termination Threshold
Figure 1: Current vs. Voltage Profile During Charging Phases.
Battery Preconditioning
Before the start of charging, the AAT3689 checks
several conditions in order to assure a safe charging
environment. The input supply must be above the
minimum operating voltage, or under-voltage lock-
out threshold (VUVLO), for the charging sequence to
begin. Also, the cell temperature, as reported by a
thermistor connected to the TS pin from the battery,
must be within the proper window for safe charging.
When these conditions have been met and a battery
is connected to the BAT pin, the AAT3689 checks
the state of the battery. If the cell voltage is below the
Preconditioning Voltage Threshold (VMIN), the
AAT3689 begins preconditioning the cell.
The battery preconditioning trickle charge current is
equal to the fast charge constant current divided by
10. For example, if the programmed fast charge cur-
rent is 500mA, then the preconditioning mode (trick-
le charge) current will be 50mA. Cell preconditioning
is a safety precaution for a deeply discharged bat-
tery and also aids in limiting power dissipation in the
pass transistor when the voltage across the device
is at the greatest potential.
Fast Charge / Constant Current Charging
The cell preconditioning continues until the voltage
on the BAT pin exceeds the Preconditioning Voltage
Threshold (VMIN). At this point, the AAT3689 begins
the constant-current fast charging phase. The fast
charge Constant Current (ICC) amplitude is deter-
mined by the charge mode, ADP or USB, and is pro-
grammed by the user via the RSETADP and RSETUSB
resistors. The AAT3689 remains in constant current
charge mode until the battery reaches the voltage
regulation point, VBAT_EOC.
Constant Voltage Charging
The system transitions to a constant voltage charg-
ing mode when the battery voltage reaches output
charge regulation threshold (VBAT_EOC) during the
constant current fast charge phase. The regulation
voltage level is factory programmed to 4.2V (±1%).
The charge current in the constant voltage mode
drops as the battery cell under charge reaches its
maximum capacity.
End of Charge Cycle Termination and
Recharge Sequence
When the charge current drops to 7.5% of the pro-
grammed fast charge current level in the constant
voltage mode, the device terminates charging and
goes into a standby state. The charger will remain
in a standby state until the battery voltage decreas-
es to a level below the battery recharge voltage
threshold (VRCH).
When the input supply is disconnected or drops
below UVLO or EN = 0, the charger will automatical-
ly enter power-saving sleep mode. Consuming an
ultra-low 0.3μA in sleep mode, the AAT3689 mini-
mizes battery drain when it is not charging. This fea-
ture is particularly useful in applications where the
input supply level may fall below the battery charge or
under-voltage lockout level. In such cases where the
AAT3689 input voltage drops, the device will enter the
sleep mode and automatically resume charging once
the input supply has recovered from its fault condition.
3689.2006.11.1.0
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AAT3689.PDF ] | |
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