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PDF AAT3783 Data sheet ( Hoja de datos )
| Número de pieza | AAT3783 | |
| Descripción | 1-A Linear Li-Ion/Polymer Battery Charger | |
| Fabricantes | Skyworks Solutions | |
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DATA SHEET
AAT3783
1-A Linear Li-Ion/Polymer Battery Charger with 28V Over-Voltage Protection
General Description
The AAT3783 BatteryManager™ is a single-cell Lithium-
Ion (Li-Ion)/Li-Polymer battery charger IC, designed to
operate from USB ports, AC adapter inputs, or from a
charger adapter up to an input voltage of 6.5V. For
increased safety, the AAT3783 also includes over-voltage
input protection (OVP) up to 28V.
The AAT3783 precisely regulates battery charge voltage
and current for 4.2V Li-Ion/Polymer battery cells through
an extremely low RDS(ON) switch. When charged from an
adapter or a USB port, the battery charging current can
be set by an external resistor up to 1A. In the case of an
over-voltage condition in excess of 6.5V, a series switch
opens preventing damage to the battery and charging
circuitry. With the addition of an external resistor the
OVP trip point can be programmed to a level other than
the factory set value of 6.5V. In the case of an OVP con-
dition a fault flag is activated.
Battery charge state is continuously monitored for fault
conditions. In the event of an over-current, battery over-
voltage, short-circuit or over-temperature failure, the
device will automatically shut down, thus protecting the
charging device, control system and the battery under
charge. A status monitor output pin is provided to indi-
cate the battery charge status by directly driving an
external LED. An open-drain power-source detection
output (ADPP) is provided to report the power supply
status.
The AAT3783 comes in a thermally enhanced, space-
saving, Pb-free 16-pin 3x4 mm TDFN package and is
specified for operation over the -40°C to +85°C tem-
perature range.
Features
• USB or AC Adapter System Power Charger
• Programmable from 100mA to 1A Max
• 4.0V ~ 7.5V Input Voltage Range
▪ Over-Voltage Input Protection up to 28V
• High Level of Integration with Internal:
▪ Charging Device
▪ Reverse Blocking Diode
▪ Current Sensing
• Digital Thermal Regulation
• Charge Current Programming (ISET)
• Charge Termination Current Programming (TERM)
• Charge Timer (CT)
• Battery Temperature Sensing (TS)
• TS Pin Open Detection
• Automatic Recharge Sequencing
• No Trickle Charge Option Available
• Full Battery Charge Auto Turn Off / Sleep State /
Charge Termination
• Automatic Trickle Charge for Battery Pre-conditioning
• Battery Over-Voltage and Over-Current Protection
• Emergency Thermal Protection
• Power On Reset
• 16-pin 3x4mm TDFN Package
Applications
• Bluetooth™ Headsets, Headphones, Accessories
• Digital Still Cameras
• Mobile Phones
• MP3 Players
• Personal Data Assistants (PDAs)
• Other Li-Ion/Polymer Battery Powered Devices
Typical Application
VIN
2.2μF
Enable Charging
Enable OVP
IN BATS
IN BAT
FLT AAT3783
OVP
INCHR
TS
STAT
ADPP
ENCHR
CT
TERM
ISET
ENOVP GND
10μF
RSET
BATT+
BATT-
TEMP
Battery
Pack
RTERM
CT
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201903B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
1
1 page  
DATA SHEET
AAT3783
1-A Linear Li-Ion/Polymer Battery Charger with 28V Over-Voltage Protection
Electrical Characteristics1
VIN = 5V, TA = -40°C to +85°C; unless otherwise noted, typical values are at TA = 25°C.
Symbol Description
Logic Control
VEN(H)
VEN(L)
VSTAT
ISTAT
VADDP
IADPP
VFLT
IFLT
TBLK_FLT
TD_FLT
TRESP_OV
Input High Threshold
Input Low Threshold
Output Low Voltage
STAT Pin Current Sink Capability
Output Low Voltage
ADPP Pin Current Sink Capability
Output Low Voltage
FLT Pin Current Sink Capability
FLT Blanking Time
FLT Assertion Delay Time from Over-Voltage
Over-Voltage Response Time
TOVPON
OVP Turn-On Delay Time
TOVPR
OVP Turn-On Rise Time
TOVPOFF OVP Turn-Off Delay Time
Battery Protection
Conditions
STAT Pin Sinks 4mA
ADPP Pin Sinks 4mA
FLT Pin Sinks 1mA
From De-assertion of OV
From Assertion of OV
VIN Rise to 7V from 5V in 1ns
Charging current = 500mA,
CINCHR = 1μF
Charging current = 500mA,
CINCHR = 1μF
Charging current = 500mA,
CINCHR = 1μF
VBOVP
IBOCP
TC
TK
TV
ITS
TS1
TS2
TLOOP_IN
TLOOP_OUT
TREG
TSHDN
Battery Over-Voltage Protection Threshold
Battery Over-Current Protection Threshold
Trickle Plus Constant Current Mode Timeout
Trickle Timeout
Constant Voltage Mode Time Out
Current Source from TS Pin
TS Hot Temperature Fault
TS Cold Temperature Fault
Thermal Loop Entering Threshold
Thermal Loop Exiting Threshold
Thermal Loop Regulation
Chip Thermal Shutdown Temperature
CCT = 100nF, VIN = 5V
CCT = 100nF, VIN = 5V
CCT = 100nF, VIN = 5V
Threshold
Hysteresis
Threshold
Hysteresis
Threshold
Hysteresis
Min
1.6
5
69
316
2.30
Typ
10
1
1
10
1
6
4.4
105
3
25
3
75
331
25
2.39
25
115
85
100
140
15
Max Units
V
0.4 V
0.4 V
8 mA
0.4 V
8 mA
0.4 V
5 mA
15 ms
μs
μs
ms
ms
μs
V
81
346
2.48
% ICH_CC
Hour
Minute
Hour
μA
mV
V
mV
ºC
ºC
ºC
ºC
1. The AAT3783 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization and correla-
tion with statistical process controls.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201903B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
5
5 Page 
DATA SHEET
AAT3783
1-A Linear Li-Ion/Polymer Battery Charger with 28V Over-Voltage Protection
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.
Constant Current Charging
Battery cell preconditioning continues until the battery
voltage reaches the preconditioning voltage threshold,
VMIN. At this point, the AAT3783 begins constant current
charging. The current level for this mode is programmed
using a single resistor from the ISET pin to ground. The
programmed current can be set at a minimum 100mA
up to a maximum of 1A.
Constant Voltage Charging
Constant current charging will continue until such time
that the battery voltage reaches the voltage regulation
point, VBAT_EOC. When the battery voltage reaches VBAT_EOC,
the AAT3783 will transition to constant voltage mode.
The regulation voltage is factory programmed to a nom-
inal 4.2V and will continue charging until the charge
termination current is reached.
Charge Status Output
The AAT3783 provides battery charge status via a status
pin. This pin is internally connected to an N-channel
open-drain MOSFET, which can be used drive an external
LED. The status pin can indicate the following condi-
tions:
Event Description
No battery charging activity
Battery charging via adapter or USB port
Charging completed
STATUS
OFF
ON
OFF
Table 1: LED Status Indicator.
Thermal Considerations
The actual maximum charging current is a function of
the charge adapter input voltage, the battery charge
state at the moment of charge, the ambient tempera-
ture, and the thermal impedance of the package. The
maximum programmable current may not be achievable
under all operating parameters.
Over-Voltage Protection
In normal operation, a P-channel MOSFET acts as a
slew-rate controlled load switch, connecting and discon-
necting the power supply from IN to INCHR. A low resis-
tance MOSFET is used to minimize the voltage drop
between the voltage source and the charger and to
reduce the power dissipation. When the voltage on the
input exceeds the over-voltage trip point (internally set
by the factory or externally programmed by a resistor
connected to the OVP pin), the device immediately turns
off the internal P-channel FET which disconnects the
charger from the abnormal input voltage, therefore pre-
venting any damage to the charger. Simultaneously, the
fault flag is raise, alerting the system.
If an over-voltage condition is applied at the time of the
device enable, then the switch will remain OFF.
OVP Under-Voltage Lockout (UVLO)
The AAT3783 OVP circuitry has a fixed 3V under-voltage
lockout level (UVLO). When the input voltage is less than
the UVLO level, the MOSFET is turned off. 100mV of
hysteresis is included to ensure circuit stability.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201903B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AAT3783.PDF ] | |
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