LTC4155 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC4155
Linear Technology
'LTC4155' PDF : 52 Pages View PDF
LTC4155
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C (Note 2). VBUS = 5V, BATSNS = 3.7V,
DVCC = 3.3V, RCLPROG1 = RCLPROG2 = 1.21k, RPROG = 499Ω, unless otherwise noted.
Battery and VBUS Currents
vs VOUT Current
0.6
INPUT CURRENT
0.4
CHARGE CURRENT
0.2
0
–0.2
500mA INPUT CURRENT LIMIT MODE
–0.4
0
0.2 0.4 0.6 0.8 1.0
VOUT CURRENT (A)
4155 G01
Switching Regulator Efficiency
95.0
4.0
92.5
EFFICIENCY
3.5
TO VOUT
90.0
3.0
87.5
EFFICIENCY
2.5
TO BATTERY
85.0
2.0
82.5
POWER LOST
1.5
TO BATTERY
80.0
1.0
POWER LOST
77.5
TO VOUT
0.5
75.0
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
CURRENT (A)
4155 G04
INCLUDES LOSSES FROM 2w Si7938DP OVP FETS
XFL4020-102ME INDUCTOR AND Si5481DU CHARGER FET
Battery and VBUS Currents
vs VOUT Current
4
3A INPUT CURRENT LIMIT MODE
3
IBUS
2
ICHG
1
Battery Drain Current
vs Temperature
10
VBUS = 0V
9
8
7
6
5
0
–1
–2
0
1
2
3
4
5
VOUT CURRENT (A)
4155 G02
4
3
SUSPEND MODE (μA)
2
1
SHIP AND STORE MODE (μA)
0
– 40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
4155 G03
Battery Charger Total Efficiency
vs Battery Voltage
100
IVOUT = 0A
95 M = PBAT/PBUS
VFLOAT = 4.2V
90
12.5% CHARGE
CURRENT MODE
85 100% CHARGE
CURRENT MODE
80
USB Compliant Load Current
Available Before Discharging
Battery
1.75
VFLOAT = 4.05V
1.50
900mA MODE
1.25
75
1.00
70
65
500mA MODE
0.75
60
55
2.4 2.7 3.0 3.3 3.6 3.9 4.2
BATTERY VOLTAGE (V)
4155 G05
INCLUDES LOSSES FROM 2w Si7938DP OVP FETS
XFL4020-102ME INDUCTOR AND Si5481DU CHARGER FET
0.50
2.4
2.7 3.0 3.3 3.6 3.9 4.2
BATTERY VOLTAGE (V)
4155 G06
500mA USB Limited Battery
Charge Current vs Battery Voltage
0.7
0.6
100% CHARGE
0.5
CURRENT MODE
0.4
12.5% CHARGE
CURRENT MODE
0.3
0.2
0.1
0
2.4 2.7
3.0 3.3
3.6 3.9 4.2
BATTERY VOLTAGE (V)
4155 G07
100mA USB Limited Battery
Charge Current vs Battery Voltage
100
VFLOAT = 4.2V
80
60
40
20
0
2.4 2.7 3.0 3.3 3.6 3.9 4.2
BATTERY VOLTAGE (V)
4155 G08
VOUT Voltage vs Battery Voltage
4.4
4.3
4.2
IVOUT = 0A, VFLOAT = 4.2V
100% CHARGE
4.1
CURRENT MODE
50% CHARGE
4.0
CURRENT MODE
3.9
12.5% CHARGE
CURRENT MODE
3.8
CHARGER DISABLED
3.7
3.6
3.5
3.4
2.4 2.7 3.0 3.3 3.6 3.9 4.2
BATTERY VOLTAGE (V)
4155 G09
4155fc
9
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