MTD6508_17 Datasheet, PDF (10/18 Pages) Microchip Technology – 3-Phase BLDC Sensorless Fan Controller Demonstration Daughter Board

MTD6508 3-Phase BLDC Sensorless Fan Controller Demonstration Daughter Board
1.2 MTD6508 DAUGHTER BOARD HARDWARE DESCRIPTION
These daughter boards have been designed specifically for the MTD6508
Demonstration Board. However, they can also be used independently as stand-alone
boards. This section provides a brief description of these boards.
Figure 1-2 provides an overview of the MTD6508 Daughter Board.
FG
RRP_PR_RO_OG_G
VVB_BIA_IAS_S
NNoottCconnected
NNoottCconnected
R3
R1
R4
C2
R2
C1
PWM
FG/3
V_DD_DD
OUT11
OUT3
FIGURE 1-2:
MTD6508 Daughter Board Overview.
• R1 is the FG pull-up resistor.
• C1 and C2 are respectively the V_DD and the V_BIAS decoupling capacitors.
• R2 is the Slew Rate Resistor (R_SR) and is available only for the MTD6508
Daughter Board with a 4x4 16-Lead UQFN MTD6508 (ADM00631). This resistor
is handled by the MTD6508 Demonstration Board via the MTD6508 Demonstra-
tion Board Software GUI. This footprint only has to be assembled if the MTD6508
Daughter Board is not plugged into a MTD6508 Demonstration Board. A 4.7K to
47K resistor has to be used.
• R3 allows connecting the R_PROG pin to GND. This resistor is handled by the
MTD6508 Demonstration Board via the MTD6508 Demonstration Board Software
GUI. This footprint only has to be assembled if the R_PROG resistor is not set by the
MTD6508 Demonstration Board Software GUI. A 0R resistor must be used.
• R4 allows setting the R_PROG resistor. This resistor is handled by the MTD6508
Demonstration Board via the MTD6508 Demonstration Board Software GUI. This
footprint only has to be assembled if the R_PROG resistor is not set by the
MTD6508 Demonstration Board Software GUI. A 24K, 3.9K or 0R resistor must
be used to connect the R_PROG pin to V_BIAS.
More details of the schematic are available in Appendix A. “Schematics and Layouts”.
1.3 WHAT THE MTD6508 DEMONSTRATION BOARD KIT INCLUDES
The MTD6508 3-Phase BLDC Sensorless Fan Controller Demonstration Daughter
Board Package (ADM00631) includes:
• 3 x MTD6508 Daughter Board with a 4x4 16-Lead UQFN MTD6508
• Important Information Sheet
DS50002515A-page 10
 2016 Microchip Technology Inc.