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LTC4077EDD Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4077EDD
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

LTC4077EDD Datasheet(HTML) 3 Page - Linear Technology

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LTC4077
3
4077f
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 = 0 to 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 unless otherwise noted.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC4077E is guaranteed to meet the 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.
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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