L6472 datasheet(52/69 Pages) STMICROELECTRONICS

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52 / 69 page

Programming manual

L6472

52/69

Doc ID 022729 Rev 1

The POW_SR bits set the slew rate value of the power bridge output:

The TQREG bit sets if the torque regulation (see Section 7.4) is performed through ADCIN

voltage (external) or the TVAL_HOLD, TVAL_ACC, TVAL_DEC and TVAL_RUN registers

(internal):

The TSW parameter is used by the current control system and it sets the target switching

period.

Any attempt to write the CONFIG register when the motor is running causes the command

to be ignored and the NOTPERF_CMD flag to rise (see Section 9.1.19).

Table 26.

Overcurrent event

OC_SD

Overcurrent event

Bridges shut down

Bridges do not shut down

Table 27.

Programmable power bridge output slew rate values

POW_SR [1..0]

Output Slew rate (1) [V/ìs] (1)

See SRout_r and SRout_f parameters in Table 5 for details.

180

290

530

Table 28.

External torque regulation enable

TQREG

External torque regulation enable

Internal registers

ADC input

Table 29.

Switching period

TSW [4..0]

Switching period

4 µs (250 kHz)

8 µs (125 kHz)

124 µs (8 kHz)

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