DRV8313EVM Datasheet, PDF (10/18 Pages) Texas Instruments – DRV8313 TRIPLE HALF-H-BRIDGE DRIVER IC

DRV8313
SLVSBA5A – OCTOBER 2012 – REVISED NOVEMBER 2012
APPLICATION INFORMATION
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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.
OU T 1
OUT2
Phase V
Phase U
OUT3
Phase W
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
State
1
2
3
4
5
6
Table 1. Three-Phase Motor Signals
OUT1 (Phase U)
IN1
EN1
OUT1
X
0
Z
1 / PWM
1
H / PWM
1 / PWM
1
H / PWM
X
0
Z
0
1
L
0
1
L
OUT2 (Phase V)
IN2
EN2
OUT2
1 / PWM
1
H / PWM
X
0
Z
0
1
L
0
1
L
X
0
Z
1 / PWM
1
H / PWM
OUT3 (Phase W)
IN3
EN3
OUT3
0
1
L
0
1
L
X
0
Z
1 / PWM
1
H / PWM
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:
OUT1
DCM Motor 1
OUT2
OUT3
Motor 2 or
Solenoid
Figure 5. Bidirectional Motor Plus Motor or Solenoid Connection
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