5

DRV8426

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SLOSE55 – MAY 2020

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Table 2. Pin Functions (continued)

PIN

I/O

TYPE

DESCRIPTION

NAME

NO.

HTS

SOP

VQF

N

STEP

23

18

I

Input

Step input. A rising edge causes the indexer to advance one step; internal pulldown resistor.

VCP

1

24

—

Power

Charge pump output. Connect a X7R, 0.22-μF, 16-V ceramic capacitor to VM.

VM

2, 13

1, 8

—

Power

Power supply. Connect to motor supply voltage and bypass to GND with two 0.01-µF ceramic

capacitors (one for each pin) plus a bulk capacitor rated for VM.

TOFF

19

14

I

Input

Sets the Decay mode off time during current chopping; four level pin. Also sets the ripple

current in smart tune ripple control mode.

nFAULT

16

11

O

Open

Drain

Fault indication. Pulled logic low with fault condition; open-drain output requires an external

pullup resistor.

nSLEEP

26

21

I

Input

Sleep mode input. Logic high to enable device; logic low to enter low-power sleep mode;

internal pulldown resistor. An nSLEEP low pulse clears faults.

PAD

-

-

-

-

Thermal pad. Connect to system ground.

(1)

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended

Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

6 Specifications

6.1 Absolute Maximum Ratings

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

(1)

MIN

MAX

UNIT

Power supply voltage (VM)

–0.3

35

V

Charge pump voltage (VCP, CPH)

–0.3

V

Charge pump negative switching pin (CPL)

–0.3

V

nSLEEP pin voltage (nSLEEP)

–0.3

V

Internal regulator voltage (DVDD)

–0.3

5.75

V

Control pin voltage (STEP, DIR, ENABLE, nFAULT, DECAY0, DECAY1, TOFF, M0, M1)

–0.3

5.75

V

Open drain output current (nFAULT)

0

10

mA

Reference input pin voltage (VREF)

–0.3

5.75

V

Continuous phase node pin voltage (AOUT1, AOUT2, BOUT1, BOUT2)

–1

V

Transient 100 ns phase node pin voltage (AOUT1, AOUT2, BOUT1, BOUT2)

–3

V

Peak drive current (AOUT1, AOUT2, BOUT1, BOUT2)

Internally Limited

A

–40

125

°C

–40

150

°C

–65

150

°C

6.2 ESD Ratings

VALUE

UNIT

D)

Electrostatic

discharge

Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001

±2000

V

Charged-device model (CDM), per JEDEC specification JESD22-C101

Corner pins for PWP (1,

14, 15, and 28)

±750

Other pins

±500