STPMC1 datasheet(35/77 Pages) STMICROELECTRONICS

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STPMC1

Theory of operation

Doc ID 15728 Rev 6

35/77

APL = 1:

MOP/MON provides stepper motor driving signals from 3-phase active energy wide band

9.11)

according to

Table 20.

LED pin provides 3-phase energy pulses according to

Table 19 with frequency C not related

to KMOT.

9.13

Driving a stepper motor - standalone operating mode

(configuration bits: APL, LVS, KMOT)

When used in standalone mode (APL[1] = 1), the STPMC1 is able to directly drive a stepper

motor.

Table 18.

LED pin configuration for APL = 0

LVS (1 bit)

FUND (1 bit)

KMOT (2 bits)

LED energy output

Phase

Freq

Active energy wide band P

3-ph

C (1)

Active energy fundamental F

3-ph

Reactive energy wide band Q

3-ph

Reactive energy fundamental R

3-ph

C is the number of pulses per kWh set with calibration.

Table 19.

LED pin configuration for APL = 1

LVS (1 bit)

FUND (1 bit)

LED energy output

Phase

Freq

Active energy wide band P

3-ph

Active energy fundamental F

Reactive energy wide band Q

Reactive energy fundamental R

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