DRV8426PWPR datasheet(24/49 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

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Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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24 / 49 page

DRV8426

SLOSE55 – MAY 2020

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Product Folder Links: DRV8426

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Table 10. OFF Time Settings

TOFF

OFF Time

7 µs

16 µs

Hi-Z

24 µs

330k

Ω to GND

32 µs

7.3.6.7 Blanking time

After the current is enabled (start of drive phase) in an H-bridge, the current sense comparator is ignored for a

period of time (tBLANK) before enabling the current-sense circuitry. The blanking time also sets the minimum drive

time of the PWM. The blanking time is approximately 1 µs.

7.3.7 Charge Pump

A charge pump is integrated to supply a high-side N-channel MOSFET gate-drive voltage. The charge pump

requires a capacitor between the VM and VCP pins to act as the storage capacitor. Additionally a ceramic

capacitor is required between the CPH and CPL pins to act as the flying capacitor.

Figure 15. Charge Pump Block Diagram

DRV8426PWPR Datasheet(PDF) 24 Page - Texas Instruments