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PDF AAT3620 Data sheet ( Hoja de datos )
| Número de pieza | AAT3620 | |
| Descripción | 1-Cell Li+ Switch Mode Battery Charger | |
| Fabricantes | Anadigics | |
| Logotipo |  |
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BatteryManagerTM
PRODUCT DATASHEET
AAT3620178
1-Cell Li+ Switch Mode Battery Charger
General Description
The AAT3620 BatteryManager™ is a member of
AnalogicTech’s Total Power Management IC™ family.
With the many functions added to mobile devices such
as color display, camera with flash, organizer, video, etc,
the battery capacity must keep pace with the power
requirements. The AAT3620 is the ideal solution for high
capacity Li+ batteries and can supply up to 2.0A charge
current with minimal thermal impact to the system.
The AAT3620 is a PWM switch mode / linear charger with
high charge efficiency at the full constant current (fast
charge) rate. Based on a 1.5MHz PWM step-down “buck”
converter, the AAT3620 PWM switch mode controls the
constant current charge mode up to 2.0A, and auto-
matically switches to linear mode charging during the
battery conditioning low level current and the light load
end of charge current termination region. The full charge
rate and the end of charge current can be programmed
with separate external resistors. A shared charge current
indication pin is available for a Coulomb counter.
Battery charge temperature and charge state are fully
monitored for fault conditions. In the event of an over-
current, over-voltage, short-circuit or over-temperature
failure, the device will automatically shut down. A status
monitor output pin is provided to indicate the battery
charge status and power source status though a display
LED.
The AAT3620 is available in a thermally enhanced,
space-saving 14-pin 3x3mm TDFN package that includes
all essential components for a switch-mode battery
charger.
Features
• 4.3V~6.0V Input Range
• Up to 2.0A Charge Current Capability
• 1.5MHz PWM/Linear Charger
• Over 90% Full Rate Charge Efficiency
• Integrated Switching Device
• Integrated Sense Resistor
• Built-in Reverse Blocking Feature
• Battery Preconditioning/Constant Voltage/Constant
Current Charge Mode
• Programmable End of Charge Current
• 1% Constant Voltage Mode Regulation
• Built-in Programmable Charging Timer
• Charge Current Indication Pin
• Over-Voltage, Over-Current, and Over-Temperature
Protection
• Battery Over-Temperature Protection
• Power-On Reset and Soft-Start
• TDFN33-14 Package
Applications
• Digital Camcorders
• Point of Service (POS)
• Portable DVD Players
• Portable Hand-held Solutions
• Portable Media Player
Typical Application
4.7µH
Adapter
Charge Enable
Timer Disable
Charging Status 1
Charging Status 2
22µF
0.1µF
CS
VPIN
VCC
EN
0.1µF
CT
LX
BAT
PGND
TS
STAT1
ISET
STAT2
TERM
GND
RTERM
Battery
BATT + Pack
22µF
to 47µF
BATT-
+
–
TEMP
Charge Current Set
Termination Current Set
and Charge Current Indicator
R SET
3620.2009.01.1.0
www.analogictech.com
1
1 page  
www.DataSheet4U.com
BatteryManagerTM
PRODUCT DATASHEET
AAT3620178
1-Cell Li+ Switch Mode Battery Charger
Electrical Characteristics1
VIN = 5.5V, TA = -25°C to 85°C; unless otherwise noted, typical values are at TA = 25°C.
Symbol Description
Logic and Status Input/Output
VHIGH
VLOW
EN Input Low Threshold
EN Input Low Threshold
IEN EN Pin Supply Current
ISLEAK
STAT1, STAT2 Pin Leakage Current
ISTATx
STAT1 and STAT2 Pin Current Sink Capability
tSTAT_PULSE
STAT Pulse Width
fSTAT_FLASH STAT Pulse Frequency
Protection
VBAT_OVP
IOCP_LMT2
V IBAT_OVP DATA
Battery Over-Voltage Protection Threshold
Over-Current Protection Threshold and Limit
VTS1 TS Hot Temperature Fault
VTS2
TTH
TTH HYS
VCT_DIS
TS Cold Temperature Fault Threshold
Thermal Shutdown
Thermal Shutdown Hysteresis
Charge Timer Disable Threshold
Conditions
EN = VIN
EN = 0V
When output FET is off
In fault conditions
In fault conditions
No charge if VBAT > VBAT_OVP
Threshold
Hysteresis
Threshold
Hysteresis
No timer out if CT voltage
holds to be less than VCT_DIS
Min
1.6
2.46
29.1
58.2
Typ Max Units
V
0.4 V
0.1 1 μA
0.6 10 μA
1 μA
10 mA
0.5 s
1 Hz
VBAT_REG
+ 0.2
3.0
30
50
60
50
140
15
4.0
30.9
61.8
0.4
V
A
% VIN
mV
% VIN
mV
°C
°C
V
1. Specification over the –25°C to +85°C operating temperature range is assured by design, characterization and correlation with statistical process controls.
3620.2009.01.1.0
www.analogictech.com
5
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BatteryManagerTM
System Operation Flowchart
PRODUCT DATASHEET
AAT3620178
1-Cell Li+ Switch Mode Battery Charger
Enable
Power On Reset
No
Shut Down
Yes
Power
Input Voltage
VIN > VUVLO
No VIN: VPIN, VCC
Yes
Yes
Fault
Conditions Monitoring
OV, OT,
VTS1 < TS < V TS2
No
Expired
Charge Timer
Control
No
Recharge Test
VRCH > VBAT
Preconditioning
Test
VBAT < VMIN
No
Yes
Preconditioning
(Trickle Charge)
VBAT > VMIN
Yes
Current Phase Test
VBAT < VBAT_EOC
Yes
Constant
Current Charge
Mode
VBAT > VBAT_EOC
No
Voltage Phase Test
IBAT > ITERM
No
Constant
Yes Voltage Charge
Mode
IBAT < ITERM
Charge Completed
Figure 2: System Operation Flowchart for the Battery Charger.
3620.2009.01.1.0
www.analogictech.com
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| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet AAT3620.PDF ] | |
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