MCT8317A datasheet(23/161 Pages) TI1

Part #	MCT8317A

Description	MCT8317A High Speed Sensorless Trapezoidal Control Integrated FET BLDC Driver

PDF	161 Pages

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Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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23 / 161 page

DUTY_CMD

PWM Duty at SPEED pin

100%

DutyEN_SB DutyEX_SB

Figure 8-10. PWM Mode Speed Control

8.3.7.3 I2C based Speed Control

I2C based serial interface can be used for speed control by setting SPD_CTRL_MODE to 10b. In this mode,

the speed command can be written directly into SPEED_CTRL. The SPEED pin can be used to control

the sleep entry and exit - if SPEED pin input is set to a value lower than VEN_SL after SPEED_CTRL has

been set to 0b for a time longer than SLEEP_TIME, MCT8317A enters sleep state. When SPEED pin >

VEX_SL, MCT8317A exits sleep state and speed is controlled through SPEED_CTRL. If 0 ≤ SPEED_CTRL

≤ SPEED_CTRLEN_SB and SPEED pin > VEX_SL, MCT8317A is in standby state. The relationship between

DUTY_CMD and SPEED_CTRL is shown in Figure 8-11. Refer Section 8.4.1.2 for more information on

SPEED_CTRLEN_SB EX_SB and SPEED_CTRLEN_SB EN_SB.

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MCT8317A

SLLSFQ2 – JANUARY 2023

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MCT8317A Datasheet(PDF) 23 Page - Texas Instruments