LTM8062IV#PBF Linear Technology, LTM8062IV#PBF Datasheet - Page 9

• Manufacturer Part Number: LTM8062IV#PBF
• Description: IC, BATT CHRG, Li-Ion, Li-Polymer, 2A, LGA77
• Manufacturer: Linear Technology

Specifications of LTM8062IV#PBF

• Battery Type: Li-Ion, Li-Polymer
• Input Voltage: 32V
• Battery Charge Voltage: 14.4V
• Charge Current Max: 2A
• Battery Ic Case Style: LGA
• No. Of Pins: 77
• No. Of Series Cells: 1

OPERATION
scheme is used, the LTM8062 also supports bad battery
detection, which triggers a system fault if a battery stays
in precondition mode for more than one-eighth of the total
programmed charge cycle time.
Once charging terminates and the LTM8062 is not actively
charging, the charger automatically enters a low current
standby mode in which supply bias currents are reduced
to 85μA. If the battery voltage drops 2.5% from the full
charge float voltage, the LTM8062 engages an automatic
charge cycle restart. The IC also automatically restarts a
new charge cycle after a bad-battery fault once the failed
battery is removed and replaced with another battery.
BATTERY VOLTAGE
BATTERY CHARGE
BATTERY VOLTAGE
BATTERY CHARGE
Figure 1. Typical C/10 Terminated Charge Cycle (TMR Grounded, Time Not to Scale)
CURRENT
FAULT
CHRG
CURRENT
RUN
FAULT
CHRG
RUN
Figure 2. Typical EOC (Timer-Based) Terminated Charge Cycle
(Capacitor Connected to TMR, Time Not to Scale)
< t
EOC
/8
t
EOC
The LTM8062 contains a battery temperature monitoring
circuit. This feature, using a thermistor, monitors battery
temperature and will not allow charging to begin, or will
suspend charging, and signal a fault condition if the bat-
tery temperature is outside a safe charging range. The
LTM8062 contains two digital open-collector outputs,
CHRG and FAULT, which provide charger status and signal
fault conditions. These binary coded pins signal battery
charging, standby or shutdown modes, battery tempera-
ture faults and bad battery faults. For reference, C/10 and
TMR based charging cycles are shown in Figures 1 and 2.
AUTOMATIC
RESTART
1
0
1
0
1
0
1
0
1
0
1
0
FLOAT VOLTAGE
RECHARGE THRESHOLD
PRECONDITION THRESHOLD
MAXIMUM CHARGE CURRENT
PRECONDITION CURRENT
C/10
0 AMPS
FLOAT VOLTAGE
RECHARGE THRESHOLD
PRECONDITION THRESHOLD
MAXIMUM CHARGE CURRENT
PRECONDITION CURRENT
C/10 CURRENT
8062 F01
8062 F02
LTM8062
8062fa
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