AAT3681A
500mA USB Port or AC Adapter
Lithium-Ion/Polymer Battery Charger
Electrical Characteristics
1
V
ADP
= 5V, T
A
= -25°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C.
Symbol
Operation
V
ADP
V
UVLO
I
OP
I
SHUTDOWN
Description
Adapter Voltage Range
Under-Voltage Lockout (UVLO)
UVLO Hysteresis
Operating Current
Conditions
Min
4.0
3
Typ
Max Units
7.5
4
V
V
mV
mA
Rising Edge
Charge Current = 200mA
V
BAT
= 4.25V, V
EN
= GND
(AAT3681A, AAT3681A-1)
V
BAT
= 4.25V, V
EN
= 5V
(AAT3681A-2, AAT3681A-3)
V
BAT
= 4V, ADP Pin Open
150
0.5
1
Shutdown Current
0.3
1
µA
I
LEAKAGE
Reverse Leakage Current from BAT Pin
Voltage Regulation
V
BAT_EOC
End of Charge Accuracy
ΔV
CH
/V
CH
Output Charge Voltage Tolerance
V
MIN
V
RCH
Preconditioning Voltage Threshold
0.4
4.158
4.20
0.5
3.0
2
4.242
µA
V
%
V
Battery Recharge Voltage Threshold
AAT3681A, AAT3681A-2,
and AAT3681A-3 Only
Measured from V
BAT_EOC
AAT3681A, AAT3681A-1,
and AAT3681A-2 Only
2.85
3.15
-0.1
V
Current Regulation
I
CH
Charge Current Programmable Range
2
ΔI
CH
/I
CH
Charge Current Regulation Tolerance
V
SET
ISET Pin Voltage
K
I_A
Current Set Factor: I
CH
/I
SET
Charging Devices
R
DS(ON)
Charging Transistor On Resistance
Logic Control/Protection
V
EN(H)
Input High Threshold
V
EN(L)
Input Low Threshold
V
STAT
Output Low Voltage
I
STAT
STAT Pin Current Sink Capability
V
OVP
Over-Voltage Protection Threshold
I
TK
/I
CH
I
TERM
/I
CH
Pre-Charge Current
15
10
2
800
V
ADP
= 5.5V
1.6
STAT Pin Sinks 4mA
4.4
I
CH
= 100mA; AAT3681A,
AAT3681A-2, and
AAT3681A-3 Only
AAT3681A, AAT3681A-1, and
AAT3681A-2 Only
10
0.6
500
mA
%
V
1
Ω
V
V
V
mA
V
%
0.4
0.4
8
Charge Termination Threshold Current
10
%
1. The AAT3681A 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.
2. Achievable charge current may be limited by power dissipation capability of the package under certain operating conditions. See
“Thermal Considerations” section of this datasheet.
4
3681A.2007.10.1.2
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
