PWM

Microcontroller

M

GPIOs

SEL control

Outputs

GPIOs

DRV5012

DRV5012

DRV5012

6 Gate Drivers

& MOSFETs

GPIO

3

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DRV5012

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SLVSDD5 – AUGUST 2017

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8 Application and Implementation

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

The DRV5012 device is typically used in rotary applications for brushless DC (BLDC) motor sensors or

incremental rotary encoding.

To ensure reliable functionality, the magnet should apply a flux density at the sensor greater than the maximum

mechanical tolerance, temperature effects, and magnet variation.

8.2 Typical Applications

8.2.1 BLDC Motor Sensors Application

Figure 13. BLDC Motor System

8.2.1.1 Design Requirements

For this design example, use the parameters listed in Table 1.

Table 1. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Number of motor phases

3

Motor RPM

3000

Number of magnet poles on the rotor

6

Magnetic material

Bonded Neodymium

Peak magnetic flux density at the Hall sensors

±15 mT

2 to 3.5 V