LTC4012-2_15 Datasheet, PDF (3/28 Pages) Linear Technology – High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control

LTC4012/
LTC4012-1/LTC4012-2
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. DCIN = 20V, BAT = 12V, GND = 0V unless otherwise noted. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Charge Voltage Regulation
V_TOL
V_BAT Accuracy (See Test Circuits)
LTC4012
C-Grade
I-Grade
–0.5
l –0.8
l –1.0
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
–0.6
l –0.8
l –1.1
l –1.15
l –1.25
l –1.35
0.6
%
0.8
%
1.1
%
1.15
%
1.25
%
1.35
%
I_VFB
V_FB Input Bias Current
V_FB = 1.2V
±20
nA
R_ON
FBDIV On Resistance
I_LOAD = 100µA
l
85
190
Ω
I_LEAK-FBDIV FBDIV Output Leakage Current
SHDN = 0V, FBDIV = 0V
l –1
0
1
µA
V_BOV
V_FB 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
I_TOL
Charge Current Accuracy with R_IN = 3.01k,
6V < BAT < 18V (LTC4012)
6V < BAT < 15V (LTC4012-1, LTC4012-2)
R_PROG = 26.7k
C-Grade
I-Grade
–4
l –5
l –9.5
4
%
5
%
9.5
%
V_SENSE = 0mV, PROG = 1.2V
–12.75 –11.67 –10.95
µA
A_I
Current Sense Amplifier Gain (PROG ∆I) with
V_SENSE Step from 0mV to 5mV,
R_IN = 3.01k, 6V < BAT < 18V (LTC4012)
PROG = 1.2V
6V < BAT < 15V (LTC4012-1, LTC4012-2)
–1.78 –1.66 –1.54
µA
V_CS-MAX
Maximum Peak Current Sense Threshold Voltage
per Cycle (R_IN = 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
V_C10
C/10 Indicator Threshold Voltage
V_REV
Reverse Current Threshold Voltage
PROG Falling
PROG Falling
340
400
460
mV
180
253
295
mV
Input Current Regulation
V_CL
Current Limit Threshold
CLP – CLN
C-Grade
I-Grade
97
100
103
mV
l 96
100
104
mV
l 92
108
mV
I_CLN
CLN Input Bias Current
CLN = CLP
±100
nA
V_ICL
ICL Indicator Threshold
(CLP – CLN) – V_CL
–8
–5
–2
mV
CLP Supply
OVR
Operating Voltage Range
6
28
V
V_UVLO
CLP Undervoltage Lockout Threshold
V_UV(HYST) UVLO Threshold Hysteresis
CLP Increasing
l 4.65 4.85 5.25
V
200
mV
I_CLPO
CLP Operating Current
CLP = 20V, No Gate Loads
2
3
mA
Shutdown
V_ACP
AC Present Threshold Voltage
DCIN – BAT, DCIN Rising
C-Grade
I-Grade
l 350
500
650
mV
l 300
700
mV
V_ACP(HYST) ACP Threshold Hysteresis Voltage
200
mV
V_IL
SHDN Input Voltage Low
V_IH
SHDN Input Voltage High
l
l 1.4
300
mV
V
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