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LTC4077 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4077
Description  Dual Input Standalone Li-Ion Battery Charger
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4077 Datasheet(HTML) 3 Page - Linear Technology

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LTC4077
3
4077fa
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IC/2
Charge Current Termination Threshold
HPWR = 0V (Note 8)
0.45
0.5
0.55
mA/mA
ITRIKL
Trickle Charge Current
VBAT < VTRIKL; RIDC = 1.25k
60
80
100
mA
VBAT < VTRIKL; RIUSB = 2.1k
30
47.5
65
mA
VBAT < VTRIKL; RIUSBL = 4k
17
25
33
mA
VTRIKL
Trickle Charge Threshold Voltage
VBAT Rising
2.8
2.9
3
V
Hysteresis
100
mV
VUVDC
DCIN Undervoltage Lockout Voltage
From Low to High
4
4.15
4.3
V
Hysteresis
200
mV
VUVUSB
USBIN Undervoltage Lockout Voltage
From Low to High
3.8
3.95
4.1
V
Hysteresis
200
mV
VASD-DC
VDCIN – VBAT Lockout Threshold
VDCIN from Low to High, VBAT = 4.2V
140
180
220
mV
VDCIN from High to Low, VBAT = 4.2V
20
50
80
mV
VASD-USB
VUSBIN – VBAT Lockout Threshold
VUSBIN from Low to High
140
180
220
mV
VUSBIN from High to Low
20
50
80
mV
VEN
EN Input Threshold Voltage
0.4
0.7
1
V
REN
EN Pulldown Resistance
1
2
5
VHPWR
HPWR Input Threshold Voltage
0.4
0.7
1
V
RHPWR
HPWR Pulldown Resistance
1
2
5
VCHRG
CHRG Output Low Voltage
ICHRG = 5mA
0.35
0.6
V
VPWR
PWR Output Low Voltage
IPWR = 5mA
0.35
0.6
V
ΔVRECHRG
Recharge Battery Threshold Voltage
VFLOAT – VRECHRG, 0°C < TA < 85°C
65
100
135
mV
tRECHRG
Recharge Comparator Filter Time
VBAT from High to Low
3
6
10
ms
tTERMINATE
Termination Comparator Filter Time
IBAT Drops Below Termination Threshold
0.8
1.5
2.2
ms
tSS
Soft-Start Time
IBAT = 10% to 90% Full-Scale
175
250
325
µs
RON-DC
Power FET “ON” Resistance
400
(Between DCIN and BAT)
RON-USB
Power FET “ON” Resistance
550
(Between USBIN and BAT)
TLIM
Junction Temperature in
105
°C
Constant-Temperature Mode
The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VDCIN = 5V, VUSBIN = 5V, HPWR = 5V unless otherwise noted.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC4077E is guaranteed to meet the performance
specifications from 0°C to 85°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: Failure to correctly solder the exposed backside of the package to
the PC board will result in a thermal resistance much higher than 40°C/W.
See Thermal Considerations.
Note 4: Supply current includes IDC pin current (approximately 100µA)
but does not include any current delivered to the battery through the BAT
pin.
Note 5: Supply current includes IUSB and IUSBL pin currents
(approximately 100µA each) but does not include any current delivered to
the battery through the BAT pin.
Note 6: Guaranteed by long term current density limitations.
Note 7: IC/10 is expressed as a fraction of measured full charge current.
Note 8: IC/2 is expressed as a fraction of measured full charge current.
Note 9: VCC is greater of DCIN or USBIN.
ELECTRICAL CHARACTERISTICS


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