Datasheet

OUT1
OUT2
DCM
OUT3
Motor 1
Motor 2 or
Solenoid
OUT1
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
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