Technical information
and start-up
BSC624-12V-B
26
6.4
Basic function / EMC concept
The BSC624-12V is a bi-directional DC/DC converter with galvanic isolation between the high voltage and the low
voltage circuit. The device is based on a transformer stage working in a serial-resonant manner, by means of which
the galvanic isolation is realised. Furthermore, by means of two buck / boost converters working in a geared mode
for the purpose of ripple reduction, the desired voltage can be set in the respective operating mode. With the
resonant topology of the transformer stage and the auto-commutation of the buck / boost converter, losses can be
limited to a minimum and excellent EMC properties can be achieved.
With the BSC624-12V, a compact, vibration-resistant and light-weight construction was prioritised in order to
enable the usage in almost all applications and installation locations.
6.4.1
Topology benefits
The power component of the transformer stage is based on a resonant switching topology which is used for
switching in the current zero-crossing. The buck / boost converter required for the voltage adaptation uses the
auto-commutation principle, which leads to a soft commuting of the bridge point. Due to the significantly slower
changes of current and voltage, EMC faults can be significantly reduced in comparison to hard-switching
topologies.
