STEVAL-ISF003V1 Datasheet, PDF (1/6 Pages) STMicroelectronics – Low standby losses power front-end with inrush current-limitation

STEVAL-ISF003V1
Low standby losses power front-end with inrush current-limitation
Data brief
 Criteria A at 4 kV IEC 61000-4-5 and at 4 kV
IEC 61000-4-4
 RoHS compliant
Description
The STEVAL-ISF003V1 evaluation board allows
limitation of the inrush current charging a DC bus
capacitor, to comply with standard IEC 61000-3-
3. This inrush current limitation is based on a
soft-start procedure of the mixed bridge diodes
and SCRs rectifier using progressive phase
control at board start-up.
This solution drastically reduces standby losses
as the DC bus can be totally disconnected from
the AC mains when it does not have to operate.
DC bus deactivation is simply achieved by
turning off SCRs, without requiring an additional
relay to open the circuit in standby.
The steady-state losses are also reduced, thanks
to the removal of the NTC / PTC resistor
traditionally used to limit the inrush current, which
in turn removes the need for a relay to bypass it.
Features
 Fully electronic solution without the need for
an inrush current limiter resistor and its bulky
bypass electromechanical relay
 DC bus disconnection at standby to reduce
losses below 0.3 W
 Inrush current compliance with IEC61000-3-
3
 Operation allowed with PFC (continuous or
discontinuous)
 Compliant with EN 55015, IEC 61000-4-11
June 2016
DocID029452 Rev 1
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