MCT8317A datasheet(18/161 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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AVDD

AGND

CAVDD

External Load

REF

–

VIN_AVDD

Figure 8-2. AVDD Linear Regulator Block Diagram

Use Equation 1 to calculate the power dissipated in the device by the AVDD linear regulator to deliver an

external load, IAVDD.

P = (VVIN_AVDD - VAVDD) x IAVDD

(1)

8.3.4 Charge Pump

Since the output stages use N-channel FETs, the device requires a gate-drive voltage higher than the VM power

supply to turn-on the high-side FETs. The MCT8317A integrates a charge-pump circuit that generates a voltage

above the VM supply for this purpose.

The charge pump requires two external capacitors(CCP, CFLY) for operation. See the block diagram and pin

descriptions for details on these capacitors (value, connection, and so forth).

CCP

CPH

Charge

Pump

Control

CPL

CFLY

Figure 8-3. Charge Pump

MCT8317A

SLLSFQ2 – JANUARY 2023

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MCT8317A Datasheet(PDF) 18 Page - Texas Instruments