AMIS-30622_13 Datasheet, PDF (23/50 Pages) ON Semiconductor – I2C Micro-Stepping Motor Driver

AMIS−30622
Thermal Shutdown Mode
When thermal shutdown occurs, the circuit performs a
<SoftStop> command and goes to motor shutdown
mode (see Figure 14: State Diagram Temperature
Management).
Temperature Management
The AMIS−30622 monitors temperature by means of two
thresholds and one shutdown level, as illustrated in the state
diagram and illustration of Figure 14: State Diagram
Temperature Management below. The only condition to
reset flags <TW> and <TSD> (respectively thermal warning
and thermal shutdown) is to be at a temperature lower than
Ttw and to get the occurrence of a GetFullStatus1 I²C
frame.
Normal Temp.
−<Tinfo> = “00”
−<TW> = ‘0’
−<TSD> = ‘0’
T° > Ttw
Thermal warning
−<Tinfo> = “10”
−<TW> = ‘1’
−<TSD> = ‘0’
T° > Ttsd
T° < Ttw &
I²C Frame:
T° > Ttw
GetFullStatus1
T° < Ttw
Thermal shutdown
−<Tinfo> = “11”
−<TW> = ‘1’
−<TSD> = ‘1’
−SoftStop if
motion ongoing
−Motor shutdown
(motion disabled)
T° < Tlow
T° > Tlow
Low Temp.
−<Tinfo> = “01”
−<TW> = ‘0’
−<TSD> = ‘0’
Post thermal
warning
−<Tinfo> = “00”
−<TW> = ‘1’
−<TSD> = ‘0’
Post thermal
shutdown 2
−<Tinfo> = “00”
−<TW> = ‘1’
−<TSD> = ‘1’
−Motor shutdown
(motion disabled)
T° > Ttsd
T° < Ttsd
T° < Ttw
Post thermal
shutdown 1
−<Tinfo> = “10”
−<TW> = ‘1’
−<TSD> = ‘1’
−Motor shutdown
(motion disabled)
T° > Ttw
Figure 14. State Diagram Temperature Management
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