LTC4061EDD-4.4 Просмотр технического описания (PDF) - Linear Technology
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LTC4061EDD-4.4 Datasheet PDF : 20 Pages
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U
OPERATIO
VCC
RNOM
NTC
2
RNTC
0.76 • VCC
–
+
0.35 • VCC
+
–
TOO COLD
TOO HOT
+
0.016 • VCC
–
LTC4061-4.4
ENABLE
40614.4 F01
Figure 1. NTC Circuit Information
LTC4061-4.4
APPLICATIO S I FOR ATIO
Programming Charge Termination
Charge Time Termination
The LTC4061-4.4 can terminate a charge cycle using one
of several methods, allowing the designer considerable
flexibility in choosing an ideal charge termination algo-
rithm. Table 1 shows a brief description of the different
termination methods and their behaviors.
Table 1.
Connecting a capacitor (CTIMER) to the TIMER pin enables
the timer and selects charge time termination. The total
charge time is set by:
TIME (HOURS) = 3 (HOURS) • C TIMER
0.1µF
METHOD
Charge
Time
Termination
Mode
Charge
Current
Termination
User
Selectable
Charge
Termination
TIMER
0.1µF to
GND
0.1µF to
GND
GND
GND
VCC
VCC
IDET
RDET to
GND
NC
RDET to
GND
NC
RDET to
GND
NC
CHARGER DESCRIPTION
Charges for 3 Hours. After 3 Hours, the Charger
Stops Charging and Enters Standby Mode.
Recharge Cycles Last for 1.5 Hours.
Charges for 3 Hours. After 3 Hours, the Charger
Stops Charging and Enters Standby Mode.
Recharge Cycles Last for 1.5 Hours.
Charges Until Charge Current Drops Below
IDET, Then Enters Standby Mode.
Charges Indefinitely.
Charges Indefinitely.
SmartStart Is Disabled.
Charges Indefinitely.
SmartStart Is Disabled.
CHRG OUTPUT DESCRIPTION
Pull-Down State While IBAT > IDET. High Impedance
State While IBAT < IDETECT or When Charging Is Stopped.
Pulsing State Available When NTC Is Used and
Is Still Charging.
Pull-Down State When Charging. High Impedance State
When Charging Is Stopped. Pulsing State Available
When NTC Is Used and Is Still Charging.
Pull-Down State When Charging. High Impedance State
When Charging Is Stopped. Pulsing State Available
When NTC Is Used and Is Still Charging.
Pull-Down State When Charging. High Impedance State
When Charging Is Stopped. Pulsing State Available
When NTC Is Used and Is Still Charging.
Pull-Down State While IBAT > IDETECT. High Impedance
State While IBAT < IDETECT or When Charging Is Stopped.
Pulsing State Available When NTC Is Used and
Is Still Charging.
Pull-Down State When Charging. High Impedance State
When Charging Is Stopped. Pulsing State Available
When NTC Is Used and Is Still Charging.
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