Datasheet
LTC4155
5
4155fc
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
≈
T
J
= 25°C (Note 2). V
BUS
= 5V, BATSNS = 3.7V, DVCC = 3.3V,
R
CLPROG1
= R
CLPROG2
= 1.21k, R
PROG
= 499Ω, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
VOUT
V
OUT
Current Available Before
Loading Battery
2.5mA I
VBUS
Mode (USB Suspend)
100mA I
VBUS
Mode, BAT = 3.3V
500mA I
VBUS
Mode, BAT = 3.3V
600mA I
VBUS
Mode, BAT = 3.3V
700mA I
VBUS
Mode, BAT = 3.3V
800mA I
VBUS
Mode, BAT = 3.3V
900mA I
VBUS
Mode, BAT = 3.3V
1.00A I
VBUS
Mode, BAT = 3.3V
1.25A I
VBUS
Mode, BAT = 3.3V
1.50A I
VBUS
Mode, BAT = 3.3V
1.75A I
VBUS
Mode, BAT = 3.3V
2.00A I
VBUS
Mode, BAT = 3.3V
2.25A I
VBUS
Mode, BAT = 3.3V
2.50A I
VBUS
Mode, BAT = 3.3V
2.75A I
VBUS
Mode, BAT = 3.3V
3.00A I
VBUS
Mode, BAT = 3.3V
1 1.3
76
673
810
944
1093
1200
1397
1728
2072
2411
2700
2846
3154
3408
3657
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
V
PROG
PROG Pin Servo Voltage 12.50% Charge Current Mode
18.75% Charge Current Mode
25.00% Charge Current Mode
31.25% Charge Current Mode
37.50% Charge Current Mode
43.75% Charge Current Mode
50.00% Charge Current Mode
56.25% Charge Current Mode
62.50% Charge Current Mode
68.75% Charge Current Mode
75.00% Charge Current Mode
81.25% Charge Current Mode
87.50% Charge Current Mode
93.75% Charge Current Mode
100.0% Charge Current Mode (Default)
150
225
300
375
450
525
600
675
750
825
900
975
1050
1125
1200
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
V
RECHRG
Recharge Battery Threshold
Voltage
Threshold Voltage Relative to V
FLOAT
96.6 97.6 98.4 %
t
TERMINATE
Safety Timer Termination Period
Selected by I
2
C Control. Timer
Starts When BATSNS ≥ V
FLOAT
1-Hour Mode
2-Hour Mode
4-Hour Mode (Default)
8-Hour Mode
0.95
1.90
3.81
7.63
1.06
2.12
4.24
8.48
1.17
2.33
4.66
9.32
Hours
Hours
Hours
Hours
V
LOWBAT
Threshold Voltage Rising Threshold
Hysteresis
2.65 2.8
130
2.95 V
mV
t
BADBAT
Bad Battery Termination Time BATSNS < (V
LOWBAT
– ∆V
LOWBAT
) 0.47 0.53 0.59 Hours
V
C/x
Full Capacity Charge Indication
PROG Voltage Selected by I
2
C
Control
C/10 Mode (I
CHARGE
= 10%FS) (Default)
C/5 Mode (I
CHARGE
= 20%FS)
C/20 Mode (I
CHARGE
= 5%FS)
C/50 Mode (I
CHARGE
= 2%FS)
110
230
15
50
120
240
24
60
130
250
33
70
mV
mV
mV
mV
h
PROG
Ratio of I
CHGSNS
to PROG Pin
Current
1000 mA/mA
h
CLPROG1
(Note 4)
Ratio of Measured V
BUS
Current to
CLPROG1 Sense Current
CLPROG1 I
VBUS
Mode 990 mA/mA