L6470HTR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L6470HTR

dSPIN™ fully integrated microstepping motor driver with motion engine and SPI

STMicroelectronics 

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L6470

Functional description

Figure 11. OSCIN and OSCOUT pin configuration

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When OSCIN is UNUSED, it should be left floating.

When OSCOUT is UNUSED, it should be left floating.

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Overcurrent detection

When the current in any of the Power MOSFETs exceeds a programmed overcurrent

threshold, the STATUS register OCD flag is forced low until the overcurrent event has

expired and a GetStatus command is sent to the IC (see Section 9.1.22 on page 55 and

Section 9.1.17 on page 47). The overcurrent event expires when all the Power MOSFET

currents fall below the programmed overcurrent threshold.

The overcurrent threshold can be programmed through the OCD_TH register in one of 16

available values ranging from 375 mA to 6 A with steps of 375 mA (see Table 9 on page 40,

Section 9.1.17).

It is possible to set whether an overcurrent event causes or not the MOSFET turn-off

(bridges in high impedance status) acting on the OC_SD bit in the CONFIG register (see

Section 9.1.21). The OCD flag in the STATUS register is raised anyway (see Table 34 on

page 55, Section 9.1.22).

When the IC outputs are turned off by an OCD event, they cannot be turned on until the

OCD flag is released by a GetStatus command.

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