LTC4010
4
4010fb
elecTrical characTerisTics
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC4010E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the 0°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Operating junction temperature T
J
(in °C) is calculated from
the ambient temperature T
A
and the total continuous package power
dissipation P
D
(in watts) by the formula:
T
J
= T
A
+ q
JA
• P
D
Refer to the Applications Information section for details. This IC includes
overtemperature protection that is intended to protect the device during
momentary overload conditions. Junction temperature will exceed 125°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.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Charger Timing
∆t
TIMER
Internal Time Base Error
l
–10 10 %
∆t
MAX
Programmable Timer Error R
TIMER
= 49.9k
l
–20 20 %
Status and Chemistry Select
V
OL
Output Voltage Low (I
LOAD
= 10mA) V
CDIV
All Other Status Outputs
l
l
435
300
700
600
mV
mV
I
LKG
Output Leakage Current All Status Outputs Inactive, V
OUT
= V
CC
l
–10 10 µA
I
IH(VCDIV)
Input Current High V
CDIV
= V
BAT
(Shutdown)
l
–1 1 µA
V
IL
Input Voltage Low CHEM (NiMH)
l
900 mV
V
IH
Input Voltage High CHEM (NiCd)
l
2.85 V
I
IL
Input Current Low CHEM = GND
l
–20 –5 µA
I
IH
Input Current High CHEM = 3.3V
l
–20 20 µA
when overtemperature protection is active. Continuous operation above
the specified maximum operating junction temperature may result in
device degradation or failure.
Note 4: All current into device pins are positive. All current out of device
pins are negative. All voltages are referenced to GND, unless otherwise
specified.
Note 5: Output current may be limited by internal power dissipation. Refer
to the Applications Information section for details.
Note 6: Either TGATE V
OH
may apply for 7.5V < V
CC
< 9V.
Note 7: These limits apply specifically to the thermistor network shown in
Figure 5 in the Applications Information section with a b of 3750 and are
guaranteed by specific V
TEMP
voltage measurements during test.
Note 8: These limits are guaranteed by correlation to wafer level
measurements.
TIME (MINUTES)
0
SINGLE CELL VOLTAGE (V)
BATTERY TEMPERATURE (°C)
1.50
1.55
1.60
60
4010 G01
1.45
1.40
20 40 80
1.35
1.30
1.65
30
32
34
28
26
24
22
36
CHARGE CURRENT
BATTERY
TEMPERATURE
SINGLE CELL
VOLTAGE
1A
TIME (MINUTES)
0
SINGLE CELL VOLTAGE (V)
BATTERY TEMPERATURE (°C)
1.60
1.65
1.70
30
4010 G02
1.55
1.50
10 20 40
1.45
1.35
1.40
1.75
40
45
50
35
30
25
15
20
55
CHARGE CURRENT
BATTERY
TEMPERATURE
SINGLE CELL
VOLTAGE
1A
2A
3A
4 SERIES NiCd 1300mAhr
SC CELLS CHARGED AT 2C
NiCd Charge Cycle at 1C NiCd Charge Cycle at 2C
Typical perForMance characTerisTics
