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| DRV8320 Datasheet, PDF (41/80 Pages) Texas Instruments – 6 to 60-V Three-Phase Smart Gate Driver | |||
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www.ti.com
SO (V)
DRV8320, DRV8320R
DRV8323, DRV8323R
SLVSDJ3 â FEBRUARY 2017
VREF
VVREF ± 0.3 V
VLINEAR
SP ± SN (V)
Figure 39. Unidirectional Current-Sense Output
SP
SO
AV
SN
SO
VREF
VVREF ± 0.25 V
VSO(off)max
VVREF ± 0.3 V
VSO(off)min
VOFF,
VDRIFT
I
R
SP ± SN
0V
VSO(range)
IÃR
0.3 V
0.25 V
0V
Figure 40. Unidirectional Current-Sense Regions
8.3.4.3 MOSFET VDS Sense Mode (SPI Only)
The current-sense amplifiers on the DRV8323 and DRV8323R SPI devices can be configured to amplify the
voltage across the external low-side MOSFET VDS. This allows for the external controller to measure the voltage
drop across the MOSFET RDS(on) without the shunt resistor and then calculate the half-bridge current level.
Copyright © 2017, Texas Instruments Incorporated
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Product Folder Links: DRV8320 DRV8320R DRV8323 DRV8323R
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