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LTC4002 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4002
Description  Standalone Li-Ion Switch Mode Battery Charger
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4002 Datasheet(HTML) 3 Page - Linear Technology

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LTC4002
3
4002f
ELECTRICAL CHARACTERISTICS (LTC4002-4.2) The denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VCC = 10V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INTC
NTC Pin Output Current
VNTC = 0.85V
75
85
95
µA
VNTC-HOT
NTC Pin Threshold Voltage (Hot)
VNTC Falling
340
355
370
mV
Hysteresis
25
mV
VNTC-COLD NTC Pin Threshold Voltage (Cold)
VNTC Rising
2.428
2.465
2.502
V
Hysteresis
170
mV
∆VRECHRG Recharge Battery Voltage Offset from Full
VBAT(FULLCHARGED) – VRECHRG, VBAT Falling
100
150
200
mV
Charged Battery Voltage
ILEAK
CHRG Pin Leakage Current
VCHRG = 8V, Charging Stops
1
µA
Oscillator
fOSC
Switching Frequency
450
500
550
kHz
DC
Maximum Duty Cycle
100
%
Gate Drive
tr
Rise Time
CGATE = 2000pF, 10% to 90%
20
ns
tf
Fall Time
CGATE = 2000pF, 90% to 10%
50
ns
∆VGATE
Output Clamp Voltage
VCC – VGATE, VCC ≥ 9V
8V
∆VGATEHI
Output High Voltage
∆VGATEHI = VCC – VGATE, VCC ≥ 7V
0.3
V
∆VGATELO
Output Low Voltage
∆VGATELO = VCC – VGATE, VCC ≥ 7V
4.5
V
(LTC4002-8.4) The
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at
TA = 25°C. VCC = 12V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
DC Characteristics
VCC
VCC Supply Voltage
8.9
22
V
ICC
VCC Supply Current
Current Mode
3
5
mA
Shutdown Mode
3
5
mA
Sleep Mode
10
20
µA
VBAT(FLT)
Battery Regulated Float Voltage
9V ≤ VCC ≤ 22V (Note 2)
8.336
8.4
8.464
V
8.316
8.484
V
VSNS(CHG) Constant Current Sense Voltage
95
100
105
mV
6V ≤ VBAT ≤ 8V (Note 3)
93
100
107
mV
VSNS(TRKL) Trickle Current Sense Voltage
VBAT = 0V (Note 3)
5
10
15
mV
VTRKL
Trickle Charge Threshold Voltage
VBAT Rising
4.7
5
5.3
V
VUV
VCC Undervoltage Lockout Threshold Voltage
VCC Rising
7.5
8.5
V
∆VUV
VCC Undervoltage Lockout Hysteresis Voltage
500
mV
VMSD
Manual Shutdown Threshold Voltage
COMP Pin Falling
200
350
500
mV
VASD
Automatic Shutdown Threshold Voltage
VCC – VBAT
250
mV
ICOMP
COMP Pin Output Current
VCOMP = 1.2V
100
µA
ICHRG
CHRG Pin Weak Pull-Down Current
VCHRG = 1V
15
25
35
µA
VCHRG
CHRG Pin Output Low Voltage
ICHRG = 1mA
0.15
0.3
V
REOC
End-of-Charge Ratio
VSNS(EOC)/VSNS(CHG)
510
15
%
tTIMER
Charge Time Accuracy
10
%
INTC
NTC Pin Output Current
VNTC = 0.85V
75
85
95
µA


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