MTD6502B-L MICROCHIP [Microchip Technology], MTD6502B-L Datasheet - Page 10

• Manufacturer Part Number: MTD6502B-L
• Description: 5V 3-Phase BLDC Sinusoidal Sensorless Fan Motor Driver
• Manufacturer: MICROCHIP [Microchip Technology]

MTD6502B
3.8
Km is the electro-mechanical coupling coefficient of the
motor (also referred to as “motor constant” or “BEMF
constant”). Depending on the conventions in use, there
may be some inconsistency in the exact definition of
Km and its measurement criteria among different motor
manufacturers. In order to work with various motor
applications, the MTD6502B offers various options to
adopt a wide range of BEMF coefficient. The BEMF
coefficient (Km) is defined as the peak value of the
phase-to-phase BEMF voltage, normalized to the
electrical speed of the motor.
TABLE 3-2:
DS25003A-page 10
3.25
Min
Km (mV/Hz) Range
6.5
13
Phase-to-Phase
BEMF Coefficient Setting
KM OPTIONS
Max
6.5
13
26
Option
0
1
2
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