MCT8317A datasheet(26/161 Pages) TI1

26 / 161 page

ZERO_

DUTY_

THR

MIN_

DUTY

SPEED_REF /

POWER_REF/

TARGET_DUTY

MIN_DUTY x MAX_SPEED /

MIN_DUTY x MAX_POWER /

MIN_DUTY

DUTY_CMD

100%

MAX_SPEED /

MAX_POWER/

100%

ZERO_

DUTY_

THR +

ZERO_

DUTY_

HYST

Figure 8-13. Control Input Transfer Function

When speed/power loop is disabled (CLOSED_LOOP_MODE = 00b), DUTY_CMD sets the TARGET_DUTY in

% - TARGET_DUTY is 100% when DUTY_CMD is 100% and TARGET_DUTY is equal to MIN_DUTY when

DUTY_CMD is set to MIN_DUTY. TARGET_DUTY stays clamped at MIN DUTY for ZERO_DUTY_THR ≤

DUTY_CMD ≤ MIN_DUTY.

When speed loop is enabled (CLOSED_LOOP_MODE = 01b), DUTY_CMD sets the SPEED_REF

in Hz. MAX_SPEED sets the SPEED_REF at DUTY_CMD of 100%. MIN_DUTY sets the minimum

SPEED_REF (MIN_DUTY x MAX_SPEED). SPEED_REF stays clamped at (MIN_DUTY x MAX_SPEED) for

ZERO_DUTY_THR ≤ DUTY_CMD ≤ MIN_DUTY.

When power loop is enabled (CLOSED_LOOP_MODE = 10b), DUTY_CMD sets the POWER_REF

in W. MAX_POWER sets the POWER_REF at DUTY_CMD of 100%. MIN_DUTY sets the minimum

POWER_REF (MIN_DUTY x MAX_POWER). POWER_REF stays clamped at (MIN_DUTY x POWER_REF)

for ZERO_DUTY_THR ≤ DUTY_CMD ≤ MIN_DUTY.

ZERO_DUTY_THR sets the DUTY_CMD below which SPEED_REF / POWER_REF / TARGET_DUTY is set to

zero and motor is in stopped state. AVS, CL_ACC configure the transient characteristics of DUTY_OUT; the

steady state value of DUTY_OUT is directly configured in % through TARGET_DUTY (when speed/power loop is

disabled) or through SPEED_REF/POWER_REF (when speed/power loop is enabled).

8.3.7.5.1 Linear Reference Profile

Note

For all types of reference profiles, duty command < ZERO_DUTY_THR stops the motor irrespective of

the speed profile register settings.

MCT8317A

SLLSFQ2 – JANUARY 2023

www.ti.com

Submit Document Feedback

Product Folder Links: MCT8317A

MCT8317A Scheda tecnica(PDF) 26 Page - Texas Instruments

MCT8317A Scheda tecnica(HTML) 26 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL