OUT1

OUT2

DCM

OUT3

Motor 1

Motor 2 or

Solenoid

OUT 1

OUT2

OUT3

Phase U

Phase V

Phase W

DRV8313

SLVSBA5A – OCTOBER 2012 – REVISED NOVEMBER 2012

www.ti.com

APPLICATION INFORMATION

Output Configurations and Connections

The typical application for the DRV8313 is to drive a 3-phase brushless motor. In this application, the three

outputs connect to the three motor leads, as shown in Figure 4.

Figure 4. Three-Phase Motor Connection

The device achieves standard 120° (also called trapezoidal or block) commutation, using synchronous

rectification, by following the states shown in Table 1

Table 1. Three-Phase Motor Signals

OUT1 (Phase U)

OUT2 (Phase V)

OUT3 (Phase W)

State

IN1

EN1

OUT1

IN2

EN2

OUT2

IN3

EN3

OUT3

1

X

0

Z

1 / PWM

1

H / PWM

0

1

L

2

1 / PWM

1

H / PWM

X

0

Z

0

1

L

3

1 / PWM

1

H / PWM

0

1

L

X

0

Z

4

X

0

Z

0

1

L

1 / PWM

1

H / PWM

5

0

1

L

X

0

Z

1 / PWM

1

H / PWM

6

0

1

L

1 / PWM

1

H / PWM

X

0

Z

On can implement asynchronous rectification by also applying the PWM signal to the enable inputs.

The DRV8313 can drive other loads, including dc brush motors and solenoids. For example, one could drive a dc

brush motor in both directions, plus a single solenoid or unidirectional dc brush motor:

Figure 5. Bidirectional Motor Plus Motor or Solenoid Connection

10

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