no-iron converter for mobile charging of low-power battery packs
DC-DC step-up converter:
The voltage step-up converter described in
this article is a transformerless design
based on just one integrated circuit
and a handful of passive parts. Efficiency
is excellent given the simplicity
of the circuit, which requires
no modifications for any input voltage
between 6 V and 12 V, for output
voltages of about 10 V and 22 V
respectively.
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