User manual

F1 LV EVALUATION PLATFORM
MOTOR CONTROL ADD-ONS
 2012 Microchip Technology Inc. DS41629A-page 21
Chapter 2. The BLDC Add-on Board
2.1 OVERVIEW
The BLDC add-on (DM164130-2) allows you to drive virtually most sensorless
three-phase brushless DC motors used in consumer electronics, ranging from small
HVAC applications to complex media reading/writing drives. The add-on is shipped
together with the ebm-papst BLDC motor, to which it connects through a ribbon cable
to a special connector on the board (J5). Alternatively, any other 5-12V BLDC motor
can be used by hooking it up through the J2 connector.
2.1.1 Features
The key features of this board include the following:
Connectors:
• Male 20-pin connector (J1) to match the F1 LV Evaluation Platform
• Generic 6-pin BLDC motor connector (J2)
• 6-pin ebm-papst motor interface (J5)
• 5-12V power supply input connector (J4)
Typical BLDC drive:
• Three P-type and 3 N-type MOSFETs forming three half bridges for the three
motor phases
• Six bipolar transistors to command the MOSFETs
• Sensing resistor for current measurement (R15)
Control:
• R21 for adjusting the zero crossing voltage
• R19 for adjusting the over-current Fault detect (software for this function is not
implemented).
Protection:
• Power fuses (F1, F2)
Power supply:
• 3.3V voltage regulator (U1)
2.1.2 What’s Included
The BLDC add-on part number (DM164130-2) contains:
• BLDC Add-on Board designed for the F1 Evaluation Platform
• ebm-papst motor (P/N: VD-3-25.07)
• 28 AWG ribbon cable to match the ebm-papst motor
Note: The function labels on these two controls are reversed on the R2 revision
of these boards.