DRV8426PWPR datasheet(6/49 Pages) TI1

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DRV8426

SLOSE55 – MAY 2020

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(1)

STEP input can operate up to 500 kHz, but system bandwidth is limited by the motor load

(2)

Power dissipation and thermal limits must be observed

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MIN

MAX

UNIT

VVM

Supply voltage range for normal (DC) operation

4.5

Logic level input voltage

5.5

VVREF

VREF voltage

0.05

3.3

ƒPWM

Applied STEP signal (STEP)

500(1)

kHz

IFS

Motor full-scale current (xOUTx)

1.5(2)

Irms

Motor RMS current (xOUTx)

1.1(2)

Operating ambient temperature

–40

125

°C

Operating junction temperature

–40

150

°C

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

6.4 Thermal Information

THERMAL METRIC(1)

PWP (HTSSOP)

RGE (VQFN)

UNIT

28 PINS

24 PINS

RθJA

Junction-to-ambient thermal resistance

33.5

44.4

°C/W

RθJC(top) Junction-to-case (top) thermal resistance

29.7

37.4

°C/W

RθJB

Junction-to-board thermal resistance

13.7

21.4

°C/W

ψJT

Junction-to-top characterization parameter

0.8

1.1

°C/W

ψJB

Junction-to-board characterization parameter

13.7

21.4

°C/W

RθJC(bot) Junction-to-case (bottom) thermal resistance

5.1

7.1

°C/W

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