Datasheet

LTC4011
3
4011fb
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Thermistor Termination
V
RT
Output Voltage R
L
= 10k
l
3.075
3
3.3 3.525
3.6
V
V
I
RT
Short-Circuit Current V
RT
= 0V
l
–9 –1 mA
PWM Current Source
V
FS
BAT – SENSE Full-Scale Regulation
Voltage (Fast Charge)
0.3V < BAT < V
CC
– 0.3V (Note 5)
BAT = 4.8V
l
95
95
100
100
105
105
mV
mV
V
PC
BAT – SENSE Precharge Regulation Voltage 0.3V < BAT < V
CC
– 0.3V (Note 5)
BAT = 4.8V
l
16
16
20
20
24
24
mV
mV
V
TC
BAT – SENSE Top-Off Charge
Regulation Voltage
0.3V < BAT < V
CC
– 0.3V (Note 5)
BAT = 4.8V
l
6.5
6.5
10
10
13.5
13.5
mV
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
l
–1 0 1 µA
f
TYP
Typical Switching Frequency
l
460 550 640 kHz
f
MIN
Minimum Switching Frequency
l
20 30 kHz
DC
MAX
Maximum Duty Cycle
98 99 %
V
OL(TG)
TGATE Output Voltage Low
(V
CC
– TGATE, Note 7)
V
CC
> 9V, No Load
V
CC
< 7V, No Load
l
l
5
V
CC
– 0.5
5.6
V
CC
8.75 V
V
V
OH(TG)
TGATE Output Voltage High V
CC
– TGATE, No Load
l
0 50 mV
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
l
0 50 mV
V
OH(BG)
BGATE Output Voltage High No Load
l
INTV
DD
– 0.075 INTV
DD
V
t
R(BG)
BGATE Rise Time C
LOAD
= 1.6nF, 10% to 90%
35 80 ns
t
F(BG)
BGATE Fall Time C
LOAD
= 1.6nF, 10% to 90%
15 80 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
l
320 350 370 mV
V
BOV
Battery Overvoltage
l
1.815 1.95 2.085 V
V
MFC
Minimum Fast Charge Voltage
l
850 900 950 mV
V
FCBF
Fast Charge Battery Fault Voltage
l
1.17 1.22 1.27 V
∆V
TERM
–∆V Termination CHEM OPEN (NiCd)
CHEM = 0V (NiMH)
l
l
16
6
20
10
25
14
mV
mV
V
AR
Automatic Recharge Voltage V
CELL
Decreasing
l
1.260 1.325 1.390 V
∆T
TERM
∆T Termination (Note 8)
CHEM = 3.3V (NiCd)
CHEM = 0V (NiMH)
l
l
1.3
0.5
2
1
2.7
1.5
°C/min
°C/min
T
MIN
Minimum Charging Temperature (Note 8) V
TEMP
Increasing
l
0 5 9 °C
T
MAXI
Maximum Charge Initiation
Temperature (Note 8)
V
TEMP
Decreasing, Not Charging
l
41.5 45 47 °C
The l 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.