DRV8426PWPR datasheet(12/49 Pages) TI1

Part #	DRV8426PWPR

Description	DRV8426 Stepper Driver With Integrated Current Sense, 1/256 Microstepping, STEP/DIR Interface and smart tune Technology

PDF	49 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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12 / 49 page

DRV8426

SLOSE55 – MAY 2020

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Product Folder Links: DRV8426

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7.3.2 PWM Motor Drivers

The DRV8426 device has drivers for two full H-bridges to drive the two windings of a bipolar stepper motor.

Figure 4 shows a block diagram of the circuitry.

Figure 4. PWM Motor Driver Block Diagram

7.3.3 Microstepping Indexer

Built-in indexer logic in the DRV8426 device allows a number of different step modes. The M0 and M1 pins are

used to configure the step mode as shown in Table 4. The settings can be changed on the fly.

Table 4. Microstepping Indexer Settings

MODE0

MODE1

STEP MODE

Full step (2-phase excitation) with 100%

current

330k

Ω to

GND

Full step (2-phase excitation) with 71% current

Non-circular 1/2 step

Hi-Z

1/2 step

1/4 step

DRV8426PWPR Datasheet(PDF) 12 Page - Texas Instruments