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LTC4012_15 Datasheet, PDF (3/28 Pages) Linear Technology – High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control | |||
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LTC4012/
LTC4012-1/LTC4012-2
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)
LTC4012
C-Grade
I-Grade
â0.5
l â0.8
l â1.0
0.5
%
0.8
%
1.0
%
LTC4012-1/LTC4012-2
C-Grade
FVS1 = 0V, FVS0 = 0V, I-Grade
FVS1 = 0V, FVS1 = 5V, I-Grade
FVS1 = 5V, FVS0 = 0V, I-Grade
FVS1 = 5V, FVS1 = 5V, I-Grade
â0.6
l â0.8
l â1.1
l â1.15
l â1.25
l â1.35
0.6
%
0.8
%
1.1
%
1.15
%
1.25
%
1.35
%
IVFB
VFB Input Bias Current
VFB = 1.2V
±20
nA
RON
FBDIV On Resistance
ILOAD = 100µA
l
85
190
Ω
ILEAK-FBDIV FBDIV Output Leakage Current
SHDN = 0V, FBDIV = 0V
l â1
0
1
µA
VBOV
VFB Overvoltage Threshold
LTC4012
l 1.235 1.281 1.32
V
BAT Overvoltage Threshold
LTC4012-1/LTC4012-2, Relative to l 103
106
109
%
Selected Output Voltage
Charge Current Regulation
ITOL
Charge Current Accuracy with RIN = 3.01k,
6V < BAT < 18V (LTC4012)
6V < BAT < 15V (LTC4012-1, LTC4012-2)
RPROG = 26.7k
C-Grade
I-Grade
â4
l â5
l â9.5
4
%
5
%
9.5
%
VSENSE = 0mV, PROG = 1.2V
â12.75 â11.67 â10.95
µA
AI
Current Sense Amplifier Gain (PROG âI) with
VSENSE Step from 0mV to 5mV,
RIN = 3.01k, 6V < BAT < 18V (LTC4012)
PROG = 1.2V
6V < BAT < 15V (LTC4012-1, LTC4012-2)
â1.78 â1.66 â1.54
µA
VCS-MAX
Maximum Peak Current Sense Threshold Voltage
per Cycle (RIN = 3.01k)
ITH = 2V, C-Grade
ITH = 2V, I-Grade
ITH = 5V
l 140
195
250
mV
l 125
265
mV
l
325
430
mV
VC10
C/10 Indicator Threshold Voltage
VREV
Reverse Current Threshold Voltage
PROG Falling
PROG Falling
340
400
460
mV
180
253
295
mV
Input Current Regulation
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
CLN = CLP
±100
nA
VICL
ICL Indicator Threshold
(CLP â CLN) â VCL
â8
â5
â2
mV
CLP Supply
OVR
Operating Voltage Range
6
28
V
VUVLO
CLP Undervoltage Lockout Threshold
VUV(HYST) UVLO Threshold Hysteresis
CLP Increasing
l 4.65 4.85 5.25
V
200
mV
ICLPO
CLP Operating Current
CLP = 20V, No Gate Loads
2
3
mA
Shutdown
VACP
AC Present Threshold Voltage
DCIN â BAT, DCIN Rising
C-Grade
I-Grade
l 350
500
650
mV
l 300
700
mV
VACP(HYST) ACP Threshold Hysteresis Voltage
200
mV
VIL
SHDN Input Voltage Low
VIH
SHDN Input Voltage High
l
l 1.4
300
mV
V
4012fa
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