Datasheet

18
LTC4011
4011fa
APPLICATIO S I FOR ATIO
WUUU
Figure 7. 3A NiMH Charger with Full PowerPath Control
Figure 6. Minimum 1A LTC4011 Application
and installed battery, while a pair of red LEDs indicates
charging. A yellow LED indicates fault conditions. The
grounded CHEM pin selects the NiMH charge termination
parameter set.
While the LTC4011 is a complete, standalone solution,
Figure 9 shows that it can also be interfaced to a host
microprocessor. The host MCU can control the charger
directly with an open-drain I/O port connected to the
V
TEMP
pin, if that port is low leakage and can tolerate at
least 2V. The charger state is monitored on the four
LTC4011 status outputs. Charging of NiMH batteries is
selected in this example. However, NiCd (CHEM V
RT
)
parameters could be chosen as well.