As the Samlex tech note mentions, it is the issue of back powering a
switching power supply from a nearly charged battery, and the duty cycle
issue. If you reduce the current to the charging function, it should be
possible to use the switcher with a protective Schottky diode in series as
Samlex notes, and you should be sure to provide plenty of cooling to the
Switching power supply.
73,
Stuart K5KVH
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