L6472PDTR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L6472PDTR

dSPIN fully integrated microstepping motor driver with motion engine and SPI

STMicroelectronics 

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L6472

Phase current control

Figure 16. Adaptive decay - fast decay tuning

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When two or more fast decays are performed with the present target current, the control

system adds a fast decay at the end of every OFF time, keeping the OFF state duration

constant (tOFF is split into tOFF,SLOW and tOFF,FAST). When the current threshold is increased

by a microstep change (rising step), the system returns to normal decay mode (slow decay

only) and the tFAST value is halved.

Stopping the motor or reaching the current sine wave zero crossing causes the current

control system to return to the reset state.

DocID022729 Rev 5

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