Lithium-Ion/Polymer Battery Charger
Electrical Characteristics
1
V
ADP
= 5V, T
A
= -25°C to +85°C, unless otherwise noted. Typical values are at T
A
= 25°C.
Symbol
Operation
ADP/USB
V
UVLO
I
OP
I
SLEEP
I
Leakage
AAT3685
Description
Input Voltage Range
Under-Voltage Lockout
Under-Voltage Lockout Hysteresis
Operating Current
Sleep Mode Current
Conditions
Min
4.0
Typ
Max Units
5.5
V
V
mV
mA
μA
μA
4.242
3.15
4.64
2.1
1000
V
%
V
V
V
V
mA
%
V
V
Rising Edge
CC Charge Current = 500mA
AAT3685: V
BAT
= 4.25V
AAT3685-1: V
BAT
= 4.25V
V
BAT
= 4V, ADP/USB Pin
Open
4.158
2.8
No Connection on CHR Pin
4.3
1.9
50
3.0
150
0.75
0.3
1
1.0
4.2
0.5
3.0
V
BAT_EOC
- 0.1
4.5
2.0
1.5
1.0
3
Reverse Leakage Current from
BAT Pin
Voltage Regulation
V
BAT_EOC
1
End of Charge Voltage Accuracy
ΔV
BAT
/V
BAT
EOC Voltage Tolerance
V
MIN
Preconditioning Voltage Threshold
V
RCH
Battery Recharge Voltage Threshold
V
ADP/USB_CHR
Charge Reduction Regulation
V
CHR
CHR Pin Voltage Accuracy
Current Regulation
I
CH
Charge Current
Charge Current Regulation
ΔI
CH
/I
CH
Tolerance
V
SETH
SETH Pin Voltage
V
SETL
SETL Pin Voltage
K
IUH
Current Set Factor: I
CHARGE
/I
SETH
K
IUL
Current Set Factor: I
CHARGE
/I
SETL
Charging Devices
Charging MOSFET Transistor
R
DS(ON)U
On Resistance
10
CC Mode
CC Mode
2.0
2.0
2000
2000
0.4
0.5
0.65
V
IN
= 5.5V
Ω
1. The AAT3685 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.
4
3685.2006.10.1.3
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
