DRV8320 Datasheet, PDF (30/80 Pages) Texas Instruments – 6 to 60-V Three-Phase Smart Gate Driver

DRV8320, DRV8320R
DRV8323, DRV8323R
SLVSDJ3 – FEBRUARY 2017
www.ti.com
Table 5. Independent PWM Mode Truth Table
INLx
INHx
GLx
GHx
0
0
L
L
0
1
L
H
1
0
H
L
1
1
H
H
Because the high-side and low-side V_DS overcurrent monitors share the SHx sense line, using the monitors if
both the high-side and low-side gate drivers of one half-bridge are split and being used is not possible. In this
case, connect the SHx pin to the high-side driver and disable the V_DS overcurrent monitors as shown in
Figure 20.
INHx
INLx
Disable
VDS
+
±
VCP
HS
VGLS
LS
Gate Driver
Disable
+
VDS _±
VM
VDRAIN
GHx
SHx
GLx
SLx/SPx
Load
Load
Figure 20. Independent PWM High-Side and Low-Side Drivers
If the half-bridge is used to implement only a high-side or low-side driver, using the V_DS overcurrent monitors is
still possible. Connect the SHx pin as shown in Figure 21 or Figure 22. The unused gate driver and the
corresponding input can be left disconnected.
INHx
INLx
VDS
+
±
VCP
HS
VGLS
LS
VM
VDRAIN
GHx
SHx
GLx
Load
INHx
INLx
VDS
+
±
VCP
HS
VGLS
LS
VM
VDRAIN
GHx
Load
SHx
GLx
Gate Driver
SLx/SPx
Gate Driver
SLx/SPx
+
VDS _±
Figure 21. Single High-Side Driver
+
VDS _±
Figure 22. Single Low-Side Driver
30
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