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| LTC4002_15 Datasheet, PDF (3/16 Pages) Linear Technology – Standalone Li-Ion Switch Mode Battery Charger | |||
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LTC4002
ELECTRICAL CHARACTERISTICS (LTC4002-4.2) The â denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. VCC = 10V unless otherwise noted.
SYMBOL
INTC
VNTC-HOT
PARAMETER
NTC Pin Output Current
NTC Pin Threshold Voltage (Hot)
VNTC-COLD NTC Pin Threshold Voltage (Cold)
âVRECHRG Recharge Battery Voltage Offset from Full
Charged Battery Voltage
ILEAK
CHRG Pin Leakage Current
Oscillator
fOSC
Switching Frequency
DC
Maximum Duty Cycle
Gate Drive
tr
tf
âVGATE
âVGATEHI
âVGATELO
Rise Time
Fall Time
Output Clamp Voltage
Output High Voltage
Output Low Voltage
CONDITIONS
VNTC = 0.85V
VNTC Falling
Hysteresis
VNTC Rising
Hysteresis
VBAT(FULLCHARGED) â VRECHRG, VBAT Falling
VCHRG = 8V, Charging Stops
CGATE = 2000pF, 10% to 90%
CGATE = 2000pF, 90% to 10%
VCC â VGATE, VCC ⥠9V
âVGATEHI = VCC â VGATE, VCC ⥠7V
âVGATELO = VCC â VGATE, VCC ⥠7V
MIN
â 75
â 340
â 2.428
100
TYP
85
355
25
2.465
170
150
MAX
95
370
2.502
200
UNITS
µA
mV
mV
V
mV
mV
1
µA
450 500 550
kHz
100
%
20
ns
50
ns
â
8
V
â
0.3
V
â 4.5
V
(LTC4002-8.4) The â 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
DC Characteristics
VCC
VCC Supply Voltage
ICC
VCC Supply Current
VBAT(FLT) Battery Regulated Float Voltage
CONDITIONS
Current Mode
Shutdown Mode
Sleep Mode
9V ⤠VCC ⤠22V (Note 2)
VSNS(CHG) Constant Current Sense Voltage
VSNS(TRKL) Trickle Current Sense Voltage
VTRKL
Trickle Charge Threshold Voltage
VUV
VCC Undervoltage Lockout Threshold Voltage
âVUV
VCC Undervoltage Lockout Hysteresis Voltage
VMSD
Manual Shutdown Threshold Voltage
VASD
Automatic Shutdown Threshold Voltage
ICOMP
COMP Pin Output Current
ICHRG
CHRG Pin Weak Pull-Down Current
VCHRG CHRG Pin Output Low Voltage
REOC
End-of-Charge Ratio
tTIMER Charge Time Accuracy
INTC
NTC Pin Output Current
6V ⤠VBAT ⤠8V (Note 3)
VBAT = 0V (Note 3)
VBAT Rising
VCC Rising
COMP Pin Falling
VCC â VBAT
VCOMP = 1.2V
VCHRG = 1V
ICHRG = 1mA
VSNS(EOC)/VSNS(CHG)
VNTC = 0.85V
MIN TYP MAX UNITS
â 8.9
22
V
3
5
mA
3
5
mA
10
20
µA
8.336 8.4 8.464
V
â 8.316
8.484
V
95
100
105
mV
â 93
100 107
mV
5
10
15
mV
4.7
5
5.3
V
7.5
8.5
V
500
mV
200
350
500
mV
250
mV
100
µA
15
25
35
µA
0.15
0.3
V
5
10
15
%
10
%
â 75
85
95
µA
4002f
3
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