LT3652 Ver la hoja de datos (PDF) - Linear Technology
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LT3652 Datasheet PDF : 26 Pages
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LT3652
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 20V, Boost – SW = 4V, SHDN = 2V, VFB = 3.3V, CTIMER = 0.68μF.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN
VIN(OVLO)
VIN Operating Range
VIN Start Voltage
OVLO Threshold
OVLO Hysteresis
VBAT = 4.2 (Notes 3, 4)
VBAT = 4.2 (Note 4)
VIN Rising
l 4.95
l 7.5
32
V
V
l 32
35
40
V
1
V
VIN(UVLO)
UVLO Threshold
UVLO Hysteresis
VIN Rising
4.6
4.95
V
0.2
V
VFB(FLT)
Float Voltage Reference
(Note 6)
3.282 3.3 3.318
V
l 3.26
3.34
V
ΔVRECHARGE
VFB(PRE)
VFB(PREHYST)
Recharge Reference Threshold
Reference Precondition Threshold
Reference Precondition Threshold
Hysteresis
Voltage Relative to VFB(FLT) (Note 6)
VFB Rising (Note 6)
Voltage Relative to VFB(PRE) (Note 6)
82.5
mV
2.3
V
70
mV
VIN_REG(TH)
IIN_REG
IVIN
Input Regulation Reference
Input Regulation Reference Bias Current
Operating Input Supply Current
VFB = 3V; VSENSE – VBAT = 50mV
VIN_REG = VIN_REG(TH)
CC/CV Mode, ISW = 0
Standby Mode
Shutdown (SHDN = 0)
l 2.65
2.7
2.75
V
l
35
100
nA
l
2.5
3.5
mA
85
μA
15
μA
IBOOST
IBOOST/ISW
BOOST Supply Current
BOOST Switch Drive
Switch On, ISW = 0,
2.5 < V(BOOST – SW) < 8.5
ISW = 2A
20
mA
30
mA/A
VSW(ON)
Switch-On Voltage Drop
VIN – VSW, ISW = 2A
350
mV
ISW(MAX)
Switch Current Limit
l 2.5
3
A
VSENSE(PRE)
Precondition Sense Voltage
VSENSE – VBAT; VFB = 2V
15
mV
VSENSE(DC)
Maximum Sense Voltage
VSENSE – VBAT; VFB = 3V (Note 7)
l 95
100
105
mV
VSENSE(C/10)
C/10 Trigger Sense Voltage
VSENSE – VBAT, Falling
l 7.5
10
12.5
mV
IBAT
BAT Input Bias Current
Charging Terminated
0.1
1
μA
ISENSE
SENSE Input Bias Current
Charging Terminated
0.1
1
μA
IREVERSE
IVFB
Charger Reverse Current
IBAT + ISENSE + ISW
VFB Input Bias Current
VIN = 0; VBAT = VSENSE = VSW = 4.2V
Charging Terminated
1
μA
65
nA
IVFB
VFB Input Bias Current
CV Operation (Note 5)
110
nA
VNTC(H)
NTC Range Limit (High)
VNTC Rising
l 1.25 1.36 1.45
V
VNTC(L)
NTC Range Limit (Low)
VNTC Falling
l 0.27 0.29 0.315
V
VNTC(HYST)
NTC Threshold Hysteresis
% of threshold
20
%
RNTC(DIS)
NTC Disable Impedance
Impedance to ground
l 250
500
kΩ
INTC
NTC Bias Current
VNTC = 0.8V
l 47.5
50
52.5
μA
VSHDN
Shutdown Threshold
Rising
l 1.15
1.2
1.25
V
VSHDN(HYST)
Shutdown Hysteresis
120
mV
ISHDN
SHDN Input Bias Current
–10
nA
VCHRG, VFAULT
Status Low Voltage
10mA Load
l
0.4
V
ITIMER
Charge/Discharge Current
25
μA
VTIMER(DIS)
Timer Disable Threshold
l 0.1
0.25
V
3652fb
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