STA6940M datasheet(2/19 Pages) ALLEGRO

2 / 19 page

Brushed DC Motor Driver IC With PWM Control

STA6940M

Selection Guide

Part Number

Package

Packing

STA6940M

18-pin ZIP through hole mount

18 pieces per tube

*Contact Allegro for additional packing options

Absolute Maximum Ratings

Characteristic

Symbol

Notes

Rating

Units

Main Supply Voltage

VBB

Logic Supply Voltage

VDD

Output Current

IO(max)

≤ 100 μs8

Output Voltage

–1.5 to VBB + 1.5

Logic Input Voltage

VIN

–0.3 to VDD + 0.3

PWM_REF Input Voltage

VPREF

–0.3 to VDD + 0.3

OCP_REF Input Voltage

VOREF

–0.3 to VDD + 0.3

Sensing Voltage

VRS

Except tw < 1 μs

–1 to 2

Power Dissipation

DC drive

2.7

PWM drive (Slow Decay)

3.0

PWM drive (Fast Decay)

3.2

Junction Temperature

150

ºC

Operating Ambient Temperature

–20 to 85

ºC

Storage Temperature

Tstg

–30 to 150

ºC

All performance characteristics given are typical values

for circuit or system baseline design only and are at the

nominal operating voltage and an ambient temperature,

TA, of 25°C, unless otherwise stated.

Recommended Operating Conditions

Characteristic

Symbol

Conditions

Min.

Typ.

Max.

Unit

Main Supply Voltage

VBB

–

Output Current

––4

Logic Supply Voltage

VDD

Transient voltages at VDD pin must not

exceed ±0.5 V

3.0

–

5.5

PWM Reference Input Voltage

VPREF

Constant-current control

–

OCP Reference Input Voltage

VOREF

OCP operating

–

Case Temperature

Package surface temperature without

heatsink

–

°C

Ambient Temperature, TA (°C)

DC operation

PWM (Slow Decay)

PWM (Fast Decay)

R JA = 42°C / W

3.2 W

3.5

3.0

2.5

2.0

1.5

1.0

0.5

1020304050607080

3.0 W

2.7 W

R JA = 46°C / W

R JA = 39°C / W

Power Derating Curve

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

STA6940M Datasheet(PDF) 2 Page - Allegro MicroSystems

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