MCT8317A datasheet(24/161 Pages) TI1

Part #	MCT8317A

Description	MCT8317A High Speed Sensorless Trapezoidal Control Integrated FET BLDC Driver

PDF	161 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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24 / 161 page

DUTY_CMD

SPEED_CTRL

32767

100%

SPEED_CTRLEN_SB

SPEED_CTRLEX_SB

Figure 8-11. I2C Mode Speed Control

8.3.7.4 Frequency-Mode Speed Control

Frequency based speed control is configured by setting SPD_CTRL_MODE to 11b. In this mode, duty

command varies linearly as a function of the frequency of the square wave input at SPEED pin. When 0 ≤

FreqSPEED ≤ FreqEN_SB, DUTY_CMD is set to zero and the motor is stopped. When FreqEX_SB ≤ FreqSPEED ≤

INPUT_MAX_FREQUENCY, DUTY_CMD varies linearly with FreqSPEED as shown in Figure 8-12. FreqEX_SB

and FreqEN_SB are the standby entry and exit thresholds - refer Section 8.4.1.2 for more information on

FreqEX_SB and FreqEN_SB. Input frequency greater than INPUT_MAX_FREQUENCY clamps the DUTY_CMD

to 100%.

MCT8317A

SLLSFQ2 – JANUARY 2023

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MCT8317A Datasheet(PDF) 24 Page - Texas Instruments