DRV8808 Datasheet, PDF (33/38 Pages) Texas Instruments – COMBINATION MOTOR DRIVER WITH DC-DC CONVERTER

DRV8808
www.ti.com
SLVS857A – DECEMBER 2009 – REVISED AUGUST 2011
Function Table in nORT, Power Down, V_M Conditions
The following is valid only when the protection control bits (in Extended Setup register) are all 0.
DEVICE STATUS
nSleep
nORT
V_M < 6 V during power down
4.5 V < V_M
CHARGE PUMP
Active
Inactive
Active
Inactive
Table 11.
OSCM
Active
Active
Active
Inactive
nORT
Inactive
Active
See timing chart
Active
MODE SETTING
Available
Depend on power down
Depend on power down
Unavailable
Table 12. Shutdown Functions
FAULT CONDITION
DCDC_A
DCDC_B
DCDC_C
MOTOR
nORT
DCDC_A UVP/OVP/OCP
Shut down
Shut down
Shut down
Shut down
Asserted (low)
DCDC_B UVP/OVP/OCP
Shut down
Shut down
Shut down
Shut down
Asserted (low)
DCDC_C UVP/OVP/OCP
Shut down
Shut down
Shut down
Shut down
Asserted (low)
Motor OCP
See MISD Control See MISD Control See MISD Control See MISD Control See MISD Control
Table
Table
Table
Table
Table
TSD
See TSD Control
Table
See TSD Control
Table
See TSD Control
Table
See TSD Control
Table
See TSD Control
Table
• Table is valid when the Protection and Reset Mask bits in the Extended Setup register are all 0.
• If Reset Mask (selective shutdown) bits are set, shutdown and release description is in the note following the
Extended Setup register definition.
• DC-DC regulators are released at V_M > Vth_VM+ when V_M increasing. When V_M decreasing, regulators are shut
down when V_M < Vth_VM–. When Vth_VM+ > V_M > Vth_VM–, OVP and UVP are masked.
• Motor OCP shutdown release is specified in MISD Control Table.
• TSD shutdown release is specified in TSD Control Table.
Copyright © 2009–2011, Texas Instruments Incorporated
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