Datasheet

MAX8662/MAX8663
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (Input Limiter and Battery Charger) (continued)
(V
DC
= 5V, V
BAT
= 4V, V
CEN
= 0V, V
PEN_
= 5V, R
PSET
= 3kΩ, R
ISET
= 3.15kΩ, C
CT
= 0.068µF, T
A
= -40°C to +85°C, unless otherwise
noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
BATTERY CHARGER
BAT-to-SYS On-Resistance
R
BAT_REG
V
DC
= 0V, V
BAT
= 4.2V, I
SYS
= 1A 40 80
mΩ
BAT-to-SYS Reverse
Regulation Voltage
V
D C
= 5V , V
P E N 1
= V
P E N 2
= 0V ( U S B 100m A m od e) ,
I
SYS
= 200mA (BAT to SYS voltage drop during SYS
overload)
50 100 150
mV
T
A
= +25°C
4.179 4.200 4.221
BAT Regulation Voltage
V
BAT_REG
I
BAT
= 0mA
T
A
= -40°C to +85°C
4.158 4.200 4.242
V
BAT Recharge Threshold BAT voltage drop to restart charging
-140 -100 -60
mV
R
ISET
= 1.89kΩ
1250
R
ISET
= 3.15kΩ
675 750 825
BAT Fast-Charge Current
I
SYS
= 0mA,
R
PSET
= 1.5kΩ,
V
PEN1
= V
PEN2
= 5V
R
ISET
= 7.87kΩ
300
mA
BAT Prequalification Current
V
BAT
= 2.5V, R
ISET
= 3.15kΩ (prequalification
current is 10% of fast-charge current)
75
mA
ISET Resistance Range R
ISET
Guaranteed by BAT charging current
(1.5A to 300mA)
1.57 7.87
kΩ
V
ISET
-to-I
BAT
Ratio
R
ISET
= 3.15kΩ (ISET output voltage to actual
charge-current ratio)
2
V/A
Charger Soft-Start Time
t
SS_CHG
Charge-current ramp time
1.5
ms
BAT Prequalification
Threshold
V
BAT
rising, 180mV hysteresis
2.9 3.0 3.1
V
V
DC
= 0V
0.01
5
BAT Leakage Current
V
BAT
= 4.2V,
outputs disabled
V
DC
= V
CEN
= 5V
0.01
5
µA
CHG and Top-Off Threshold
I
BAT
where CHG goes
high, and top-off timer;
I
BAT
falling (7.5% of
fast-charge current)
R
ISET
= 3.15kΩ
56.25
mA
Timer-Suspend Threshold I
BAT
falling (Note 3)
250 300 350
mV
Timer Accuracy C
CT
= 0.068µF
-20 +20
%
Prequalification Time
t
PREQUAL
From CEN high to end of prequalification charge,
V
BAT
= 2.5V, C
CT
= 0.068µF
30
Min
Charge Time
t
FST-CHG
From CEN high to end of fast charge,
C
CT
= 0.068µF
300
Min
Top-Off Time
t
TOP-OFF
From CHG high to end of fast charge,
C
CT
= 0.068µF
30
Min
Charger Thermal-Limit
Temperature
(Note 4)
100
°C
Charger Thermal-Limit Gain
R
PSET
= 3kΩ 50
m A/°C