AMIS-30624_13 Datasheet, PDF (23/52 Pages) ON Semiconductor – I2C Micro-stepping Motor Driver

AMIS−30624, NCV70624
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−30624/NCV70624 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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