DRV8850_16 Datasheet, PDF (14/30 Pages) Texas Instruments – Low-Voltage H-Bridge IC with LDO Voltage Regulator

DRV8850
SLVSCC0B – NOVEMBER 2013 – REVISED DECEMBER 2015
VCC
4
OUT1
1 Forward drive
1
2 Fast decay
OUT2 _{3 Low-side slow decay}
OUT1
2
4 High-side slow decay
3
VCC
4
1
2
3
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OUT2
1 Reverse drive
2 Fast decay
3 Low-side slow decay
4 High-side slow decay
FORWARD
REVERSE
Figure 14. Forward and Reverse Operation
When using an independent half-bridge as a high-side driver, VPROPI does not output a current measurement
during slow decay. During typical operation, VPROPI represents the total current flowing to loads connected to
OUT1 and OUT2.
VPROPI is nonfunctional when implemented as a low-side driver.
VCC
VCC
1
OUT1
2
1 Normal operation
2 Slow decay
OUT1
VCC
1 Normal operation
2
2 Slow decay
1
High-side driver
Low-side driver
Figure 15. High-Side and Low-Side Drivers
14
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