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LTC4012-3 Datasheet, PDF (3/28 Pages) Linear Technology – High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control | |||
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LTC4012-3
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. DCIN = 20V, BAT = 12V, GND = 0V unless otherwise noted. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Charge Voltage Regulation
VTOL
VBAT Accuracy (See Test Circuits)
C-Grade
I-Grade
â0.5
l â0.8
l â1.0
0.5
%
0.8
%
1.0
%
IVFB
VFB Input Bias Current
RON
FBDIV On Resistance
VFB = 1.2V
ILOAD = 100µA
±20
nA
l
85
190
Ω
ILEAK-FBDIV FBDIV Output Leakage Current
VBOV
VFB Overvoltage Threshold
Charge Current Regulation
SHDN = 0V, FBDIV = 0V
l â1
0
1
µA
l 1.235 1.281 1.32
V
ITOL
Charge Current Accuracy with RIN = 3.01k,
6V < BAT < 18V
RPROG = 26.7k
C-Grade
I-Grade
â4
l â5
l â9.5
4
%
5
%
9.5
%
AI
VCS-MAX
Current Sense Amplifier Gain (PROG âI) with
RIN = 3.01k, 6V < BAT < 18V
Maximum Peak Current Sense Threshold Voltage
per Cycle (RIN = 3.01k)
VSENSE = 0mV, PROG = 1.2V
VSENSE Step from 0mV to 5mV,
PROG = 1.2V
ITH = 2V, C-Grade
ITH = 2V, I-Grade
ITH = 5V
â12.75 â11.67 â10.95
µA
â1.78 â1.66 â1.54
µA
l 140
195
250
mV
l 125
265
mV
l
325
430
mV
VC10
C/10 Indicator Threshold Voltage
VREV
Reverse Current Threshold Voltage
Input Current Regulation
PROG Falling
PROG Falling
340
400
460
mV
180
253
295
mV
VCL
Current Limit Threshold
CLP â CLN
C-Grade
I-Grade
97
100
103
mV
l 96
100
104
mV
l 92
108
mV
ICLN
CLN Input Bias Current
VICL
ICL Indicator Threshold
CLN = CLP
(CLP â CLN) â VCL
±100
nA
â8
â5
â2
mV
CLP Supply
OVR
Operating Voltage Range
6
28
V
VUVLO
VUV(HYST)
ICLPO
Shutdown
CLP Undervoltage Lockout Threshold
UVLO Threshold Hysteresis
CLP Operating Current
CLP Increasing
CLP = 20V, No Gate Loads
l 4.65 4.85 5.25
V
200
mV
2
3
mA
VIL
SHDN Input Voltage Low
l
300
mV
VIH
SHDN Input Voltage High
RIN
SHDN Pull-Down Resistance
l 1.4
V
40
kΩ
ICLPS
CLP Shutdown Current
CLP = 12V, DCIN = 0V
SHDN = 0V
l
15
26
µA
350
500
µA
ILEAK-BAT BAT Leakage Current
SHDN = 0V or DCIN = 0V,
l â1.5
0
1.5
µA
0V ⤠CSP = CSN = BAT ⤠18V
ILEAK-CSN CSN Leakage Current
SHDN = 0V or DCIN = 0V,
l â1.5
0
1.5
µA
0V ⤠CSP = CSN = BAT ⤠20V
ILEAK-CSP CSP Leakage Current
SHDN = 0V or DCIN = 0V,
l â1.5
0
1.5
µA
0V ⤠CSP = CSN = BAT ⤠20V
ILEAK-SW SW Leakage Current
SHDN = 0V or DCIN = 0V,
0V ⤠SW ⤠20V
l â1
0
2
µA
40123fb
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