User manual

MTD6505 3-Phase BLDC Sensorless Fan Controller Demo Board User’s Guide
DS52009A-page 10 © 2011 Microchip Technology Inc.
1.2 MTD6505 3-PHASE BLDC SENSORLESS FAN CONTROLLER
DEMONSTRATION BOARD HARDWARE DESCRIPTION
The MTD6505 3-Phase BLDC Sensorless Fan Controller Demonstration Board
contains several components, such as:
• A microcontroller (PIC24FJ256GB) for USB connection, PWM generation, FG
frequency measurement, V
DD
measurement, other’s signal’s activations and
component’s communication.
• An adjustable LDO (MCP1827) combined to a digital potentiometer (MCP42050)
to provide the V
DD
to the MTD6505 device. The LDO can be enabled or disabled
by the microcontroller.
• The digital potentiometer is also used to set the MTD6505 R
PROG
external
resistor value.
• A Delta-Sigma (MCP3421) combined to a shunt resistor for sensing the MTD6505
current consumption on the V
DD
pin.
More details of the schematic are available in Appendix A. “Schematics and
Layouts”.
1.3 WHAT THE MTD6505 3-PHASE BLDC SENSORLESS FAN CONTROLLER
DEMONSTRATION BOARD KIT INCLUDES
The MTD6505 3-Phase BLDC Sensorless Fan Controller Demonstration Board
includes:
• MTD6505 3-Phase BLDC Sensorless Fan Controller Demonstration Board
(ADM00345)
• 3 x MTD6505 plug-in modules with soldered on MTD6505 (3x3 UDFN-10L)
• A mini-USB cable
• A 3-Phase BLDC fan (use with K
M
=1)
• Important Information Sheet