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DRV8880_15 Datasheet, PDF (31/48 Pages) Texas Instruments – DRV8880 2-A Stepper Motor Driver With AutoTune™
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DRV8880
SLVSD18A – JUNE 2015 – REVISED JULY 2015
7.4 Device Functional Modes
The DRV8880 internal logic, indexer, and charge pump are operating unless the nSLEEP pin is brought logic
low. In sleep mode the charge pump is disabled, the H-bridge FETs are disabled Hi-Z, and the V3P3 regulator is
disabled. tSLEEP must elapse after a falling edge on the nSLEEP pin before the device is in sleep mode. The
DRV8880 is brought out of sleep mode automatically if nSLEEP is brought logic high. tWAKE must elapse before
the outputs change state after wake-up.
If the ENABLE pin is brought logic low, the H-bridge outputs are disabled, but the charge pump and internal logic
will remian active. A rising edge on STEP will advance the indexer, but the outputs will not change state until
ENABLE brought logic high.
When VM falls below the VM undervoltage lockout threshold VUVLO2, the output driver and charge pump are
disabled, but the internal logic and V3P3 remain active. In this mode, STEP inputs will advance the indexer, but
the outputs will remain disabled. If VM falls below the logic undervoltage threshold VUVLO1, the internal logic is
reset and the indexer will lose position.
Table 10. Functional Modes Summary
CONDITION
Operating
6.5 V < VM < 45 V
nSLEEP pin = 1
ENABLE pin = 1
Disabled
6.5 V < VM < 45 V
nSLEEP pin = 1
ENABLE pin = 0
Sleep mode
5.0 V < VM < 45 V
nSLEEP pin = 0
VM undervoltage (UVLO2)
Logic undervoltage (UVLO1)
Fault encountered VCP undervoltage (CPUV)
Thermal shutdown (TSD)
Overcurrent (OCP)
H-BRIDGE
Operating
CHARGE PUMP
Operating
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Operating
Disabled
Disabled
Disabled
Operating
Operating
Operating
INDEXER
Operating
Operating
Disabled
Operating
Disabled
Operating
Operating
Operating
V3P3
Operating
Operating
Disabled
Operating
Operating
Operating
Operating
Operating
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