LTC4060 Linear Integrated, LTC4060 Datasheet - Page 4

• Manufacturer Part Number: LTC4060
• Description: Standalone Linear NiMH/NiCd Fast Battery Charger
• Manufacturer: Linear Integrated

ELECTRICAL CHARACTERISTICS
LTC4060
V
V
V
V
I
t
Output Drivers
I
R
V
I
Control Inputs
V
V
I
I
Note 1: Absolute Maximum Ratings only indicate limits for survivability.
Operating the device beyond these limits may result in permanent damage.
Continuous or extended application of these maximum levels may
adversely affect device reliability.
Note 2: The LTC4060 is guaranteed to meet performance specifications
from 0°C to 70°C ambient temperature range and 0°C to 85°C junction
temperature range. Specifications over the –40°C to 85°C operating
ambient temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Overtempera-
ture protection is activated at a temperature of approximately 145°C,
which is above the specified maximum operating junction temperature.
Continuous operation above the specified maximum operation temperature
may result in device degradation or failure. Operating junction temperature
T
power dissipation P
Note 4: Short duration drops below the minimum V
several microseconds or less are ignored by the undervoltage detection
circuit.
temperature range, otherwise specifications are at T
currents into the device pins are positive and all currents out of the device pins are negative. All voltages are referenced to GND
unless otherwise specified.
SYMBOL PARAMETER
4
NL
ACC
DRV
OH
IPD
IPU
J
HTIH
HTC
HTCH
NDIS
OL
IT
ITH
DRV
(in °C) is calculated from the ambient temperature T
T
J
= T
A
+ θ
NTC Pin Hot Charge Initiation Hysteresis Voltage
NTC Pin Hot Charge Cutoff Threshold Voltage
NTC Pin Hot Charge Cutoff Hysteresis Voltage
NTC Pin Disable Threshold Voltage
NTC Pin Pull-Down Current
Timer Accuracy
Drive Pin Sink Current
Drive Pin Resistance to V
ACP, CHRG Output Pins Low Voltage
ACP, CHRG Output Pins High Leakage Current
SHDN, SEL0, SEL1, CHEM, PAUSE Pins Digital
Input Threshold Voltage
SHDN, SEL0, SEL1, CHEM, PAUSE Pins Digital
Input Hysteresis Voltage
SHDN, SEL0, SEL1, CHEM Pins Digital Input
Pull-Down Current
PAUSE Pin Digital Input Pull-Up Current
JA
• P
D
D
(in watts) by the formula:
CC
CC
specification of
A
and the average
A
= 25°C. V
CONDITIONS
V
V
V
V
R
R
V
V
I
Outputs Inactive, V
V
V
V
ACP
NTC
NTC
NTC
NTC
DRIVE
DRIVE
CC
CC
IN
PROG
PROG
The
= GND
= 10V
= 10V, V
= I
Increasing
Decreasing, 4.5V ≤ V
Increasing
= 2.5V
= 698Ω, C
= 3480Ω, C
= 4V
= 4V, Not Charging
CHRG
●
CC
indicates specifications which apply over the full operating
= 5V, V
= 10mA
IN
= V
Note 5: Assumes that the external PNP pass transistor has negligible B-C
reverse leakage current when the collector is biased at 2.8V (V
charged cells in series) and the base is biased at V
Note 6: Assumes that the external PNP pass transistor has negligible B-E
reverse leakage current when the emitter is biased at 0V (V
base is biased at 5.6V (V
Note 7: The charge current specified is the regulated current through the
internal current sense resistor that flows into the external PNP pass
transistor’s emitter. Actual battery charging current is slightly less and
depends upon PNP alpha.
Note 8: Given as a per cell voltage (V
Note 9: Supply current includes the current programming resistor current
of 2mA. The charger is paused and not charging the battery.
Note 10: The minimum V
compensate for voltage drops due to test socket contact resistance and 2A
of current. This ensures that the supply voltage delivered to the device
under test does not fall below the UVLO entry threshold. Specification at
the minimum V
TIMER
TIMER
CC
CHRG
BAT
= 1.2nF and
= V
= 470pF
= 2.8V, GND = 0V unless otherwise specified. All
CC
ACP
≤ 10V
CC
= V
of 4.5V is assured by design and characterization.
CC
BAT
CC
●
●
●
supply is set at 5V during this test to
for four charged cells in series).
0.37 •
0.15
MIN
V
–15
350
0.4
25
40
–2
–2
CC
BAT
/Number of Cells).
4700
0.4 •
TYP
100
100
V
70
50
0
CC
CC
.
0.43 •
MAX
–0.4
250
120
650
V
CC
1.5
0.8
15
2
2
CC
) and the
BAT
for two
UNITS
4060f
mV
mV
mV
mA
mV
mV
µA
µA
µA
µA
%
Ω
V
V