AVR430
7
8124C-AVR-10/08
3.1.1 Phase area
Each phase has its own area with a frame drawn on silkscreen. In Figure 3-2 the area
for phase ‘V’ is shown, and everything inside this frame regards this phase onl y.
Figure 3-2. Phase ‘V’ area on MC300 PCB.
From the left we see:
1. Shunt filter/damping block – denoted ‘Sh’
2. Back EMF filter/damping block – denoted ‘EMF’
3. Shunt resistor testpoints – denoted ‘-‘ and ‘+’ (above shunt resistor)
4. Bootstrap voltage testpoint – denoted ‘Vboot’
5. MOS Gate voltage testpoints – denoted ‘VGl’ (low side) and ‘VGh ’ (high side)
3.1.2 Common shunt and filters/dividers
The common shunt (R62) with testpoints is found above phase ‘U’ and denoted
‘ShCom’. Filters/dividers for Vm, ShCom and Vn are found on the left of the phase
areas.
3.2 Schematics, component floorplan and bill of materials The schematics, component floorplan an d bill of materials (BOM) for MC300 are
found as separate PDF files distributed with this application note, they can be
downloaded from http://www.atmel.com.