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Teilenummer | AAT3692 |
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Beschreibung | Dual Input 1.6A Linear Charger | |
Hersteller | Skyworks | |
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Gesamt 19 Seiten DATA SHEET
AAT3692
Dual Input 1.6A Linear Charger with 28V OVP in a 3x4 TDFN Package
General Description
The AAT3692 BatteryManager™ is an integrated single
cell Lithium-Ion (Li-Ion) battery charger IC, designed to
operate from USB ports, AC adapter inputs, or from a
cellular phone charger adapter up to an input voltage of
7.2V typical. For increased safety, the AAT3692 also
includes over-voltage input protection (OVP) up to 28V.
The AAT3692 precisely regulates battery charge voltage
and current for 4.2V Li-Ion battery cells. The charge
current can be programmed up to 1.6A for ADP charging
and 0.5A for USB charging by external resistors on the
ADPSET/USBSET pins; the percentage of the termination
charging current is programmable by an external resistor
on the RTERM pin. In the case of an over-voltage condition
of ADP or USB input power exceeding typical 7.2V, the
internal series switch opens, blocking the damage to the
battery and charging circuitry.
The AAT3692 also includes a no-battery present input
(NOBAT). When NOBAT indicates that no battery is pres-
ent, the charging function will be suspended while OVP
is still active.
Battery charging status is continuously monitored for
fault conditions. In the event of a battery over-voltage or
chip over thermal failure, the charger will automatically
suspend charging, protecting the charging device, control
system and battery, until the fault condition is removed.
An open drain POK pin indicates the valid input of AC
adapter or USB power; an open drain status monitor
output pin (STAT) is adopted to report battery charging
activity by active low.
The AAT3692 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 tempera-
ture range.
Typical Application
Features
• Dual Input USB and AC Adapter Input
▪ Programmable Constant Current from 100mA to
1.6A for ADP Charge
▪ Programmable Constant Current from 50mA to 0.5A
for USB Charge
• No Battery Present Input Detection
• 3.0V ~ 7.2V (typical) Input Voltage Range
• Over-Voltage Input Protection up to 28V
• High Level of Integration with Internal:
▪ Power Device
▪ Reverse Current Blocking
▪ Current Sensing
• Automatic Recharge Sequencing
• Automatic Charge Reduction
• Programmable Charge Termination Current
Percentage
• Fast Over-Voltage Protection Turn Off and Release
Turn On Time
• Full Battery Charge Auto Turn Off/Sleep Mode/Charge
Termination
• Charge Status Indicator
• Input Power Good Indicator
• Automatic Trickle Charge for Battery Preconditioning
• Thermal Shutdown Protection
• Active Digital Thermal Loop Control
• Power On Reset and Soft Start
• Active Low Enable with Internal 200kΩ Resistor Pull-
Down to GND
• 3x4mm TDFN Package
Applications
• Digital Still Cameras
• Mobile Phones
• Personal Data Assistants (PDAs)
• Other Li-Ion Battery Powered Devices
USBIN
Voltage
Source
1μF
2.2μF
R1
ADPIN
1μF
R2
2.2μF
USB
USBCH
BAT
AAT3692
STAT
POK
ADP
ADPCH
NOBAT
EN
USBSET
ADPSET
TERM
GND
10μF
BATT+
BATT-
Battery
Pack
NOBAT
ON/OFF
RTERM
RADPSET
RUSBSET
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201895B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 270, 2012
1
DATA SHEET
AAT3692
Dual Input 1.6A Linear Charger with 28V OVP in a 3x4 TDFN Package
Typical Characteristics
Over-Voltage Protection Trip Voltage
vs. Temperature
7.30
7.25
7.20
7.15
7.10
7.05
7.00
-40
-20
Power Sweep Low to High
Power Sweep High to Low
0 20 40
Temperature (°C)
60
80
End of Charge Voltage vs. Input Voltage
(RADPSET = 1kΩ, RUSBSET = 3.2kΩ)
4.24
USB
4.23 ADP
4.22
4.21
4.20
4.19
4.18
4.4 4.8 5.2 5.6 6.0 6.4 6.8 7.2
Input Voltage (V)
10000
1000
100
10
1
ICHARGE vs. RADPSET
10
RADPSET (kΩ)
100
ICHARGE vs. RUSBSET
1000
100
10
1
10
RUSBSET (kΩ)
100
Battery Recharge Voltage Threshold
vs. Input Voltage
(RADPSET = 1kΩ; RUSBSET = 3.2kΩ; CBAT = 22μF)
4.14
4.12
4.10
4.08
4.06
4.04
4.02 USB
ADP
4.00
4.5 4.9 5.3 5.7 6.1 6.5 6.9
Input Voltage (V)
Battery Recharge Voltage Threshold
vs. Temperature
(VADP = VUSB = 5V; RADPSET = 1kΩ; RUSBSET = 3.2kΩ; CBAT = 22μF)
4.10
4.08
4.06
4.04
4.02
4.00
-40 -20 0
USB
ADP
20 40 60 80
Temperature (°C)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
6 201895B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
6 Page DATA SHEET
AAT3692
Dual Input 1.6A Linear Charger with 28V OVP in a 3x4 TDFN Package
System Operation Flowchart
Power On Reset
OVP Switch Off
Yes NOBAT Indicates No
Battery
No
Enable
No
Adapter Charge
USBCH =
ADPCH = 0V
Yes
OVP (7.2V) ≥
No VUSB or VADP ≥
VUVLO_ADP or VUVLO_USB
(3V)
Yes
USBCH = USB,
ADPCH = ADP
No
Recharge Test
VRCH > VBAT
Preconditioning
Test
VMIN > VBAT
Yes Preconditioning
(Trickle Charge)
No
Yes
Current Phase Test
Yes
Constant
Current Charge
VIN > VBAT_EOC
Mode
No
VADPCH > VUVLO_ADPCH
(3.5V)
Yes
No
No VUSBCH > VUVLO_USBCH
(3.5V)
Voltage Phase Test
IBAT > ITERM
Yes
Constant
Voltage Charge
Mode
No
Charge Completed
USB Charge
No
Yes
Preconditioning
Test
VMIN > VBAT
Yes Preconditioning
(Trickle Charge)
No
Recharge Test
VRCH > VBAT
Yes
Current Phase Test
Yes
Constant
Current Charge
VIN > VBAT_EOC
Mode
No
Auto Charge
Reduction
Loop
Control
Yes
VUSBCH < 4.5V
No
Voltage Phase Test
IBAT > ITERM
Yes
Constant
Voltage Charge
Mode
No
Charge Completed
Thermal Loop
Current
Reduction in
C.C. Mode
Yes
Device Thermal
Loop Monitor
TJ > 115°C
No
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
12 201895B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 27, 2012
12 Page | ||
Seiten | Gesamt 19 Seiten | |
PDF Download | [ AAT3692 Schematic.PDF ] |
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