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PDF AAT3670 Data sheet ( Hoja de datos )
| Número de pieza | AAT3670 | |
| Descripción | Dynamic Battery Charger and Power Manager | |
| Fabricantes | ANALOGICTECH | |
| Logotipo |  |
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AAT3670
1.6A Dynamic Battery Charger
and Power Manager
General Description
The AAT3670 BatteryManager is a highly integrated
single-cell lithium-ion/polymer (Li-ion) battery charger
and system power management IC that enables simul-
taneous battery charging and full system usage without
compromising the battery's charge cycle life. It operates
with low-voltage AC adapter (ADP) and USB inputs and
requires a minimum number of external components.
The AAT3670 selects ADP or USB to power the system
load and charge the battery when ADP/USB power is
available. The AAT3670 precisely regulates battery
charge voltage and current for 4.2V Li-ion cells. Charge
current can be programmed up to 1.6A for ADP charging
and 0.9A or 0.1A for USB charging by resistors on the
ADPSET/ USBSET pins. The charge termination current
threshold is set by an external resistor on the TERM pin.
The AAT3670 has a voltage-sensed charge current
reduction loop that enables system operation without a
power shortage. When the input voltage falls below the
programmable charge reduction threshold, the device
automatically reduces the charge current until the input
voltage returns to the threshold voltage.
Battery temperature and charge state are fully monitored
for fault conditions. In the event of a battery over-volt-
age/short-circuit/over-temperature condition, the charg-
er will automatically shut down, protecting the charging
device, control system, and battery. Two status monitor
output pins (STAT1 and STAT2) are provided to indicate
battery charge status by directly driving external LEDs.
The AAT3670 is available in a Pb-free, thermally-
enhanced, space-saving 24-pin 4x4mm QFN package.
BatteryManager™
Features
• ADP, USB, or Battery Powers System Load
Through Internal Current-Limited Switches
• Simultaneous Battery Charging and System
Usage
• Voltage Sensed Charge Reduction Loop
to Minimize Charge Time, Even While the
System Operates
• Digitized Thermal Loop
• Battery Power Enable (ENBAT)
• Battery Charge Timer (CT)
• Battery Temperature Monitoring (TS)
• Battery Charge Status Report (/STATx)
• Automatic Recharge Sequencing
• Battery Under-Voltage, Over-Voltage, and
Over-Current Protection
• System Load Current Limiting
• Thermal Protection
• 24-pin 4x4mm QFN Package
Applications
• Cellular Telephones
• Digital Still Cameras
• Personal Data Assistants (PDAs)
• Hand Held PCs
• MP3 Players and PMP
• Other Li-ion Battery Powered Devices
Typical Application
Adapter Input
USB Input
Enable
Enable Battery to OUT
USB Hi/Lo Select
CADP
10µF
CUSB
10µF
RADPSET RUSBSET
RADPLIM
RUSBLIM
STAT1
OUT
STAT2
ADP
BATS
BAT
AAT3670
USB
VTS
EN TS
ENBAT
USBSEL
CHRADP
ADPSET
CHRUSB
USBSET
CT
ADPLIM
USBLIM
TERM
GND
System Load
CBAT
10µF
RT
Single Cell
Li-Ion/Poly
T Battery
RTERM
CT
3670.2007.02.1.1
1
1 page  
AAT3670
1.6A Dynamic Battery Charger
and Power Manager
Electrical Characteristics
VADP = 5V, TA = -25°C to +85°C; unless otherwise noted, typical values are TA = 25°C.
Symbol
Operation
VADP
VUSB
VBAT
VUVLO_ADP
Description
AC Adapter Operating Voltage
Range
USB Operating Voltage Range
Battery Operating Voltage
Range
ADP Under-Voltage Lockout
VUVLO_USB USB Under-Voltage Lockout
VUVLO_BAT
IADP_OP
IADP_SHDN
IUSB_OP
IUSB_SHDN
BAT Under-Voltage Lockout
ADP Normal Operating Current
ADP Shutdown Mode Current
USB Normal Operating Current
USB Shutdown Mode Current
IBAT_OP
Battery Operating Current
IBAT_SLP Battery Sleep Current
IBAT_SHDN Leakage Current from BAT Pin
Power Switches
RDS(ON)_SWA
RDS(ON)_SWU
RDS(ON)_SWB
RDS(ON)_CHA
ADP-to-OUT FET On Resistance
USB-to-OUT FET On Resistance
BAT-to-OUT FET On Resistance
ADP Battery Charging FET
On Resistance
RDS(ON)_CHU
USB Battery Charging FET
On Resistance
Conditions
Rising Edge
Hysteresis
Rising Edge
Hysteresis
Rising Edge
Hysteresis
VADP = VEN = 5V, ICC = 1A
VADP = 5V, VEN = 0V,
VENBAT = 0V, No Load
VUSB = VEN = 5V, ICC = 0.5A
VUSB = 5V, VEN = 0V,
VENBAT = 0V, No Load
VBAT = VBAT_EOC, VADP = GND,
VUSB = GND, VENBAT = 5V,
No Load
VBAT = VBAT_EOC, VADP = 5V or
VUSB = 5V, VEN = VENBAT = 5V
VBAT = VBAT_EOC, VENBAT = 0V
VADP = 5.0V
VUSB = 5.0V
VBAT = 4.2V
VADP = 5.0V
VUSB = 5.0V
Min Typ Max Units
4.35
4.35
3.0
2.8
5.5 V
5.5 V
VBAT_EOC
V
3.6
0.3
V
3.6
0.3
V
2.9 3.0
0.1
V
0.5 1 mA
1 µA
0.5 1 mA
1 µA
45 80 µA
2 5 µA
1 µA
0.4 Ω
0.7 Ω
0.1 Ω
0.4 Ω
0.7 Ω
3670.2007.02.1.1
5
5 Page 
Typical Characteristics
Charging Current vs. Battery Voltage
(USBL; USBSET = 71.5KΩ)
120
100
80
60
40
20
0
2.5 2.9 3.3 3.7 4.1 4.5
Battery Voltage (V)
AAT3670
1.6A Dynamic Battery Charger
and Power Manager
Constant Charge Current vs. Temperature
(VIN = 5.0V)
1100
1000
900 ADP
800
700
600
500
400 USBH
300
200
100
0 USBL
-40 -15 10 35 60 85
Temperature (°C)
Constant Charging Current vs. Supply Voltage
(ADP; CHRADP = Open; ADPSET = 57.6kΩ)
1200
1000
800 VBAT = 3.3V, 3.6V, 3.9V
600
400
200
0
4.0 4.5 5.0 5.5 6.0
Supply Voltage (V)
Constant Charging Current vs. Supply Voltage
(ADP; CHRADP = USB; ADPSET = 57.6kΩ)
1200
1000
VBAT = 3.3V
800 VBAT = 3.6V
600
VBAT = 3.9V
400
200
0
4.0 4.5 5.0 5.5 6.0
Supply Voltage (V)
Constant Charging Current vs. Supply Voltage
(USBL; CHRUSB = Open; USBSET = 71.5kΩ)
120
VBAT = 3.3V, 3.6V
100
80
VBAT = 3.9V
60
40
20
0
4.0 4.5 5.0 5.5 6.0
Supply Voltage (V)
Constant Charging Current vs. Supply Voltage
(USBL; CHRUSB = USB; USBSET = 71.5kΩ)
120
VBAT = 3.3V
100
80
VBAT = 3.6V
60
40 VBAT = 3.9V
20
0
4.0 4.5 5.0 5.5 6.0
Supply Voltage (V)
3670.2007.02.1.1
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AAT3670.PDF ] | |
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