powersoft K2 - Page 7

7
K2 K3 | SERVICE MANUAL
INDEX
When the amplier is switched on, the following actions are performed:
1. The DC/DC converter starts, and the capacitors are charged
2. The PFC starts, rising the current, Boosts the capacitors voltage to 410VDC
3. The amplier is operational (after 3 sec)
This sequence of powering processes are followed to limit the inrush current of the MAINs
DC/DC
CONVERTER
PFC
AUX
Rectier
MAINS
90 V - 270 V
+Vdc
-Vdc
CONTROL
CIRCUIT
MAINS
90 V - 270 V
+165 Vdc
-165 Vdc
Rectier PFC DC/DC
CONVERTER
Power Supply Overview