LTC1731-8.4_15 Datasheet, PDF (3/12 Pages) Linear Technology – Lithium-Ion Linear Battery Charger Controller

LTC1731-8.2/LTC1731-8.4
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_CC = 9V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_ASD
V_DIS
I_PROG
V_PROG
I_CHRG
V_CHRG
I_C/10
t_TIMER
V_CLAMP
Automatic Shutdown Threshold Voltage
Voltage Mode Disable Threshold Voltage
PROG Pin Current
PROG Pin Load Regulation
PROG Pin Voltage
CHRG Pin Weak Pull-Down Current
CHRG Pin Output Low Voltage
End of Charge Indication Current Level
TIMER Accuracy
DRV Pin Clamp Voltage
(V_CC – V_BAT) Falling
(V_CC – V_BAT) Rising
V_DIS = (V_CC – V_TIMER)
Internal Pull-Up Current, No R_PROG
PROG Pin Source Current, ∆V_PROG ≤ 5mV
R_PROG =19.6k
V_CHRG = 1V
I_CHRG = 5mA
R_PROG = 19.6k, R_SENSE = 0.2Ω
C_TIMER = 0.01µF
V_CLAMP = V_CC – V_DRV, I_DRIVE = 50µA
30 54 90
mV
40 69 100
mV
q
0.4
V
2.5
µA
q 300
µA
2.457
V
50 100 150
µA
0.6 1.2
V
q 25 50 100
mA
10
%
6.5
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1731E-8.2/LTC1731E-8.4 are guaranteed to meet
performance specifications from 0°C to 70°C. Specifications over the
– 40°C to 85°C operating temperature range are assured by design,
characterization and correlation with statistical process controls. Consult
factory for I grade parts.
TYPICAL PERFOR A CE CHARACTERISTICS
Trickle Charge Current
vs V_CC
60
R_PROG = 19.6K
R_SENSE = 0.2Ω
V_BAT = 4V
55 ^{TA = 25°}
Trickle Charge Current
vs Temperature
60
R_PROG = 19.6K
R_SENSE = 0.2Ω
V_BAT = 4V
55 ^{VCC = 9V}
50
50
45
45
40
9
10
11
V_CC (V)
12
1731 G01
40
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1731 G06
Trickle Charge Threshold Voltage
vs V_CC
4.96
R_PROG = 19.6K
4.95 ^{TA = 25°}
4.94
4.93
4.92
4.91
4.90
4.89
4.88
9
10
11
V_CC (V)
12
1731 G08
sn1731 17318fs
3