A2919SLBTRT Allegro Micro Systems, Inc., A2919SLBTRT Datasheet

A2919SLBTRT

Manufacturer Part Number

A2919SLBTRT

Description

SOP24

Manufacturer

Allegro Micro Systems, Inc.

Datasheet

1.A2919SLBTRT.pdf (9 pages)

Specifications of A2919SLBTRT

Date_code

09+

Current page: 1 of 9
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2919

DUAL FULL-BRIDGE

MOTOR DRIVER

Motor Supply Voltage, V

Output Current, I

Logic Supply Voltage, V

Logic Input Voltage Range,

Output Emitter Voltage, V

Package Power Dissipation,

Operating Temperature Range,

Storage Temperature Range,

Output current rating may be limited by duty cycle,

ambient temperature, and heat sinking. Under any

set of conditions, do not exceed the specified

peak current rating or a junction temperature of

+150°C.

G R OUND

S E NS E

P HAS E

ABSOLUTE MAXIMUM RATINGS

OUT

R E F 2

R C

(Peak, t

(Continuous) .......................... ±750 mA

................................. -20°C to +85°C

............................... -55°C to +150°C

......................... -0.3 V to V

....................................... See Graph

≤ ≤ ≤ ≤ ≤

at T

A2919SB

20 µs) ........................ ±1.0 A

OUT

≤ ≤ ≤ ≤ ≤

150°C

B B

................... 45 V

.................. 7.0 V

.................. 1.5 V

C C

S E NS E

P HAS E

Dwg. P P -005

LOAD

S UP P LY

OUT

G R OUND

R C

G R OUND

LOG IC

S UP P LY

R E F 1

+0.3 V

2919

both windings of a bipolar stepper motor or bidirectionally control two dc

motors. Both bridges are capable of sustaining 45 V and include

internal pulse width modulation (PWM) control of the output current to

750 mA. The outputs have been optimized for a low output-saturation

voltage drop (less than 1.8 V total source plus sink at 500 mA).

mined by the user’s selection of a reference voltage and sensing

resistor. Two logic-level inputs select output current limits of 0%, 41%,

67%, or 100% of the maximum level. A PHASE input to each bridge

determines load current direction.

protection against inductive transients. Internally generated delays

prevent crossover currents when switching current direction. Special

power-up sequencing is not required. Thermal protection circuitry

disables the outputs if the chip temperature exceeds safe operating

limits.

package with a copper lead-frame and heat sinkable tabs for improved

power dissipation capabilities. The A2919SLB is supplied in a 24-lead

surface-mountable SOIC. Their batwing construction provides for

maximum package power dissipation in the smallest possible construc-

tion. The A2919SB/SLB are available for operation from -40°C to

+85°C. To order, change the suffix from 'S–' to 'E–'. These devices are

also available on special order for operation to +125°C. For applica-

tions not requiring quarter-step operation, but desire lower detent or

running current, the similar UDN2916B/EB/LB may be preferred.

FEATURES

The A2919SB and A2919SLB motor drivers are designed to drive

For PWM current control, the maximum output current is deter-

The bridges include both ground clamp and flyback diodes for

The A2919SB is supplied in a 24-pin dual in-line plastic batwing

45 V Output Sustaining Voltage

Low Output Saturation Voltage

Internal Thermal Shutdown Circuitry

Half- or Quarter-Step Operation of Bipolar Stepper Motors

750 mA Continuous Output Current

Internal Clamp Diodes

Internal PWM Current Control

PWM MOTOR DRIVER

DUAL FULL-BRIDGE

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