MP2610 – 2A, 24V INPUT, 1.1MHz 1-2CELL SWITCHING LI-ION BATTERY CHARGER
MP2610 Rev. 0.91 www.MonolithicPower.com 10
7/13/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
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0.1uF
C
30minsT
TMR
TICKLE_TMR
×=
The total charge time is:
0.1uF
C
3hoursT
TMR
TOTAL_TMR
×=
Negative Thermal Coefficient (NTC)
Thermistor
The MP2610 has a built-in NTC resistance
window comparator, which allows MP2610 to
sense the battery temperature via the thermistor
packed internally in the battery pack to ensure a
safe operating environment of the battery.
A resistor with appropriate value should be
connected from VREF33 to NTC pin and the
thermistor is connected from NTC pin to GND.
The voltage on NTC pin is determined by the
resistor divider whose divide ratio depends on
the battery temperature. When the voltage of pin
NTC falls out of NTC window range, MP2610 will
stop the charging. The charger will restart if the
temperature goes back into NTC window range.
Figure 3—Li-Ion Battery Charge Profile
