RUMBA32 V1.1 User Manual – Rev A
Page 6
4.2
P
OWER
R
AILS
RUMBA32 has the following power rails:
•
VIN1
o
Power supply as input on MAIN-PWR screw terminal
o
Maximum current draw limited by fuse F2
o
Recommended voltage is 12/24V
o
Maximum voltage must not exceed 35V or board will be damaged
•
VIN2
o
Power supply as input on HB-PWR screw terminal
o
Maximum current draw limited by fuse F1
o
Recommended voltage is 12/24V
o
Maximum voltage must not exceed 35V or board will be damaged
•
12V
o
Internal 12V rail generated from VIN1
o
Uses Buck Regulator – AOZ1284
o
Only present when board is powered from > 12V (i.e. 24V PSU)
o
Maximum current draw of 4A
o
Can be used to supply HE2, FAN0, FAN1
•
5V_DCDC
o
Internal 5V rail generated from VIN1
o
Uses Buck Regulator – AP63205
o
Only present when MAIN-PWR is supplied
o
Maximum current draw of 2A
•
5V
o
Internal 5V rail fed from 5V_DCDC and USB
o
Maximum current draw of 2A (if MAIN-PWR is connected) or 200mA (if only USB
power)
•
3.3V
o
Internal 3.3V rail generated from 5V
o
Uses Linear Regulator – AP2112K-3.3
o
Maximum current draw of 600mA