English
Language : 

LTC4012-3_15 Datasheet, PDF (3/28 Pages) Linear Technology – High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control
◁
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
–0.5
l –0.8
l –1.0
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 –1
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
–4
l –5
l –9.5
4
%
5
%
9.5
%
AI
VCS-MAX
Current Sense Amplifier Gain (PROG ∆I) 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
–12.75 –11.67 –10.95
µA
–1.78 –1.66 –1.54
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 – 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 – CLN) – VCL
±100
nA
–8
–5
–2
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 –1.5
0
1.5
µA
0V ≤ CSP = CSN = BAT ≤ 18V
ILEAK-CSN CSN Leakage Current
SHDN = 0V or DCIN = 0V,
l –1.5
0
1.5
µA
0V ≤ CSP = CSN = BAT ≤ 20V
ILEAK-CSP CSP Leakage Current
SHDN = 0V or DCIN = 0V,
l –1.5
0
1.5
µA
0V ≤ CSP = CSN = BAT ≤ 20V
ILEAK-SW SW Leakage Current
SHDN = 0V or DCIN = 0V,
0V ≤ SW ≤ 20V
l –1
0
2
µA
40123fb

 ▷