Datasheet

3
LTC4011
4011fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
PWM Current Source
V
FS
BAT – SENSE Full-Scale Regulation 0.3V < BAT < V
CC
– 0.3V (Note 5) 95 100 105 mV
Voltage (Fast Charge) BAT = 4.8V
● 95 100 105 mV
V
PC
BAT – SENSE Precharge Regulation 0.3V < BAT < V
CC
– 0.3V (Note 5) 16 20 24 mV
Voltage BAT = 4.8V
● 16 20 24 mV
V
TC
BAT – SENSE Top-Off Charge 0.3V < BAT < V
CC
– 0.3V (Note 5) 6.5 10 13.5 mV
Regulation Voltage BAT = 4.8V
● 6.5 10 13.5 mV
∆V
LI
BAT – SENSE Line Regulation 5.5V < V
CC
< 25V, Fast Charge ±0.3 mV
I
BAT
BAT Input Bias Current 0.3V < BAT < V
CC
– 0.1V –2 2 mA
I
SENSE
SENSE Input Bias Current SENSE = BAT 50 150 µA
I
OFF
Input Bias Current SENSE or BAT, V
CELL
= 0V ● –1 0 1 µA
f
TYP
Typical Switching Frequency ● 460 550 615 kHz
f
MIN
Minimum Switching Frequency ● 20 30 kHz
DC
MAX
Maximum Duty Cycle 98 99 %
V
OL(TG)
TGATE Output Voltage Low V
CC
> 9V, No Load ● 5 5.6 8.75 V
(V
CC
– TGATE, Note 7) V
CC
< 7.5V, No Load ● V
CC
–V
CC
V
0.5
V
OH(TG)
TGATE Output Voltage High V
CC
– TGATE, No Load ● 050mV
t
R(TG)
TGATE Rise Time C
LOAD
= 3nF, 10% to 90% 35 100 ns
t
F(TG)
TGATE Fall Time C
LOAD
= 3nF, 10% to 90% 45 100 ns
V
OL(BG)
BGATE Output Voltage Low No Load ● 050mV
V
OH(BG)
BGATE Output Voltage High No Load ● INTV
DD
INTV
DD
V
– 0.075
t
R(BG)
BGATE Rise Time C
LOAD
= 1.6nF, 10% to 90% 35 65 ns
t
F(BG)
BGATE Fall Time C
LOAD
= 1.6nF, 10% to 90% 15 65 ns
ADC Inputs
I
LEAK
Analog Channel Leakage 0V < V
CELL
< 2V, 550mV < V
TEMP
< 2V ±100 nA
Charger Thresholds
V
BP
Battery Present Threshold Voltage ● 320 350 370 mV
V
BOV
Battery Overvoltage ● 1.85 1.95 2.05 V
V
MFC
Minimum Fast Charge Voltage ● 850 900 950 mV
V
FCBF
Fast Charge Battery Fault Voltage ● 1.17 1.22 1.27 V
∆V
TERM
–∆V Termination CHEM OPEN (NiCd) ● 16 20 25 mV
CHEM = 0V (NiMH)
● 61014mV
V
AR
Automatic Recharge Voltage V
CELL
Decreasing ● 1.275 1.325 1.375 V
∆T
TERM
∆T Termination (Note 8) CHEM = 3.3V (NiCd) ● 1.3 2 2.7 °C/min
CHEM = 0V (NiMH)
● 0.5 1 1.5 °C/min
T
MIN
Minimum Charging Temperature V
TEMP
Increasing ● 059°C
(Note 8)
T
MAXI
Maximum Charge Initiation V
TEMP
Decreasing, Not Charging ● 41.5 45 47 °C
Temperature (Note 8)
T
MAXC
Maximum Fast Charge Temperature V
TEMP
Decreasing, Fast Charge ● 57 60 63 °C
(Note 8)
V
TEMP(D)
V
TEMP
Disable Threshold Voltage ● 2.8 3.3 V
V
TEMP(P)
Pause Threshold Voltage ● 130 280 mV
The ● indicates specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 12V, BAT = 4.8V, GND = PGND = 0V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS