LTC4011_15 Datasheet, PDF (20/26 Pages) Linear Technology – High Efficiency Standalone Nickel Battery Charger

LTC4011
Applications Information
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.
FROM
ADAPTER
12V
10µF
D1 D2 D3 D4
INFET
FAULT
CHRG
TOC
READY
6.8µH
FROM
ADAPTER
24V
10µF
0.1µF
Figure 8. Full-Featured 2A LTC4011 Application
INFET
FAULT
CHRG
TOC
READY
10µF
22µH
20
PAUSE
FROM
MCU
0.1µF
Figure 9. LTC4011 with MCU Interface
NiMH PACK
WITH 10k NTC
(1Ahr)
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