L6470PD datasheet(46/70 Pages) STMICROELECTRONICS

46 / 70 page

Programming manual

L6470

46/70

Doc ID16737 Rev 5

9.1.16

ADC_OUT

The ADC_OUT register contains the result of the analog-to-digital conversion of the ADCIN

pin voltage; the result is available even if the supply voltage compensation is disabled.

Any attempt to write to the register causes the command to be ignored and the

NOTPERF_CMD flag to rise (see Section 9.1.22).

9.1.17

OCD_TH

The OCD_TH register contains the overcurrent threshold value (see Section 6.9). The

available range is from 375 mA to 6 A, in steps of 375 mA, as shown in Table 15.

9.1.18

STALL_TH

The STALL_TH register contains the stall detection threshold value (see Section 7.2). The

available range is from 31.25 mA to 4 A with a resolution of 31.25 mA.

1.4375

1.46875

Table 13.

Winding resistance thermal drift compensation coefficient (continued)

K_THERM [3..0]

Compensation coeff.

Table 14.

ADC_OUT value and motor supply voltage compensation feature

VADCIN/VREG

ADC_OUT

[4..0]

Compensation

coefficient

Greater than VS,nom + 50%

> 24/32

0.65625

VS,nom + 50%

24/32

1000

0.65625

VS,nom

16/32

0000

VS,nom – 50%

8/32

1000

1.968875

Lower than VS,nom – 50%

< 8/32

1.968875

Table 15.

Overcurrent detection threshold

OCD_TH [3..0]

Overcurrent detection threshold

375 mA

750 mA

…

………

…

5.625 A

6 A

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