DRV10964 Datasheet, PDF (17/27 Pages) Texas Instruments – Three-Phase Sinusoidal Sensorless BLDC Motor Driver

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8 Application and Implementation
DRV10964
SLDS227 – MARCH 2016
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
DRV10964 is used in sensorless three-phase BLDC motor control. The driver provides a high performance, high
reliability, flexible and simple solution for compute fan applications. The following design shows a common
application of the DRV10964.
8.2 Typical Application
VCC
FG
FG Status
VCC
100k
2.2 µF
1 FG
2 FGS
3 VCC
4W
5 GND
PWM 10
CONFIG 9
FR 8
U7
V6
PWMIN
VCC
Direction
M
Figure 16. Typical Application Schematic
8.2.1 Design Requirements
Table 3 lists several key motor characteristics and recommended ranges which the DRV10964 is capable of
driving. However, that does not necessarily mean motors outside these boundaries cannot be driven by
DRV10964.
Recommended ranges listed in Table 3 can serve as a general guideline to quickly decide whether DRV10964 is
a good fit for an application. Motor performance is not ensured for all uses.
Table 3. Key Motor Characteristics and Recommended Ranges
Recommended Value
Rm (Ω)
2.5 ~ 10
Lm (µH)
50 ~ 1000
Kt (mV/Hz)
1 ~ 100
f_{FG_max} (Hz)
1300
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