DRV8307_15 Datasheet, PDF (13/34 Pages) Texas Instruments – DRV8307 Brushless DC Motor Controller

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DRV8307
SLVSCK2 – APRIL 2014
Feature Description (continued)
Table 1. Standard 120° Commutation⁽¹⁾
STATE
1
2
3
4
5
6
1X
2X
HALL INPUTS
DIR = 1
DIR = 0
U_H V_H W_H U_H V_H W_H
L LHHHL
LHHHL L
LHLHLH
HHL L LH
HL L LHH
HLHLHL
HHHL L L
L L LHHH
Phase U
U_HSGATE U_LSGATE
L
PWM
PWM
L
L / !PWM⁽²⁾
L / !PWM⁽²⁾
L
L
L
H
L
H
L
L
L
L
PRE-DRIVE OUTPUTS
Phase V
V_HSGATE V_LSGATE
PWM
L / !PWM⁽²⁾
L
L
L
H
L
H
L
PWM
L
L / !PWM⁽²⁾
L
L
L
L
Phase W
W_HSGATE W_LSGATE
L
H
L
H
L
PWM
PWM
L
L / !PWM⁽²⁾
L / !PWM⁽²⁾
L
L
L
L
L
L
(1) Hall sensor is H if the positive input terminal voltage is higher than the negative input terminal voltage. States 1X and 2X are illegal input
combinations.
(2) During states where the phase is driven with a PWM signal, using asynchronous rectification, the LS gate is held off (L); using
synchronous rectification, the LS gate is driven with the inverse of the HS gate.
State 1 2 3 4 5 6 1 2 3 4 5 6 1
Hall U
Hall V
Hall W
Phase U HS
Phase U LS
(1)
(1)
Phase V HS
Phase V LS (1)
(1)
(1)
Phase W HS
Phase W LS
(1)
(1)
(1) !PWM for Sync Rectification
Figure 5. Standard 120° Commutation (DIR = 1)
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