Brushed DC Motor Driver IC With PWM Control

STA6940M

3

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Main Supply Current

Operating

–

–

20

mA

Logic Supply Current

–

–

5

mA

Charge Pump Voltage

–

–

V

Charge Pump Switching Frequency

–

360

–

kHz

Main Supply Undervoltage Protection*

–7

–

V

–

7.8

–

V

Logic Supply Undervoltage Protection*

–

2.3

–

V

–

2.5

–

V

Charge Pump Undervoltage Protection*

–

3.8

–

V

–4

–

V

MOSFET On Resistance

–

0.1

0.13

Ω

MOSFET Body Diode Forward Voltage

–

0.95

–

V

MOSFET Breakdown Voltage

53

–

–

V

Logic Input Voltage

–

–

V

––

V

Logic Input Current

IIL

–

±1

–

μA

IIH

–

±1

–

μA

Maximum Input Frequency

Clock duty cycle = 50%

100

–

–

KHz

PWM_REF Pin Input Voltage

PWM_REF terminal

0.1

–

1.0

V

PWM_REF Pin Input Current

–

±10

–

μA

OCP_REF Pin Input Voltage

OCP_REF terminal

0.1

–

2.0

V

OCP_REF Pin Input Current

–

±10

–

μA

PWM Sensing Voltage

Sense1, Sense2 terminals

0.045

0.015

0.015

V

OCP Sensing Voltage

Sense1, Sense2 terminals

0.045

0.015

0.015

V

Sense1, Sense2 Pin Input Current

Sense1, Sense2 terminals

–

±20

–

μA

Diag Pin Output Voltage

–

–

1.25

V

–

–

V

Diag Pin Output Current

–

–

1.25

mA

–1.25

–

–

mA

Diag Pin Output Frequency

During PWM off-time

–

90

–

kHz

PWM Minimum On-Time (Blanking Time)

–5

–

μs

PWM Off-Time

PWM operating

–

35

–

μs

OCP Minimum On-Time

OCP operating

–

5

–

μs

OCP Off-Time

OCP operating

–

142

–

μs

Crossover Current Delay Timing

150

–

750

ns

Switching Time

Measured from input to output on

–

3.0

–

μs

Measured from input to output off

–

2.7

–

μs

Thermal Shutdown Activation

Temperature

Package back side surface temperature after

case permeated with heat from operation

–

140

–

ºC

Thermal Shutdown Release

Temperature

–

115

–

ºC

*The outputs will be disabled if any of the three undervoltage protection circuits are operating.

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com