A2918 Allegro MicroSystems, A2918 Datasheet

A2918

Manufacturer Part Number

A2918

Description

DUAL FULL-BRIDGE PWM MOTOR DRIVER

Manufacturer

Allegro MicroSystems

Datasheet

1.A2918.pdf (8 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

A2918SW

Manufacturer:

ALLEGRO/雅丽高

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

A2918SWH-LF872

Manufacturer:

ALLEGROSA

Quantity:

3 509

Company:

Meier Automation Equipment Co., Limited

Part Number:

A2918SWV

Manufacturer:

SANKEN

Quantity:

20 000

Current page: 1 of 8
Download datasheet (192Kb)

LOGIC SPLY

REFERENCE

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.

LOAD SPLY

GROUND

ENABLE 2

ENABLE 1

PHASE 2

SENSE 2

PHASE 1

SENSE 1

OUT 1A

OUT 2A

OUT 2B

OUT 1B

(Continuous) . . . . . . . . . . . . . .

RC 2

RC 1

E 2

E 1

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

. . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . -0.3 V to +7.0 V

OUT

≤

≤20 µs) . .

. . . . . . . . . 45 V

. . . . . . . . . 7.0 V

. . . . . . . . . 1.5 V

-40

-20

C to +150

C to +85

1.75 A

Dwg. PP-051

1.5 A

2918

to drive both windings of a bipolar stepper motor or bidirectionally

control two dc motors. All bridges are capable of sustaining 45 V and

include internal pulse-width modulation (PWM) control of the output

current to 1.5 A.

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

resistor. A PHASE input to each bridge determines load current

direction. Active low ENABLE inputs control the four drivers in

each bridge.

protection against inductive transients. Internally generated delays

prevent cross-over 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.

with staggered lead forming. The tab is internally insulated from the

device and requires no external isolation. The A2918SWH/V 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.

I ±1.5 A Continuous Output Current

I 45 V Output Sustaining Voltage

I Internal PWM Current Control

I Low Output Saturation Voltage

I Internal Clamp Diodes

I Internal Thermal Shutdown Circuitry

I Similar to Dual PBL3718 or Dual PBL3770

Always order by complete part number:

Part Number

A2918SWH

A2918SWV

The A2918SWH and A2918SWV motor drivers are designed

For PWM current control, the maximum output current is

The bridges include both ground clamp and flyback diodes for

The A2918SWH/V are supplied in an 18-lead power-tab package

For Horizontal Mount

For Vertical Mount

Application

PWM MOTOR DRIVER

DUAL FULL-BRIDGE

Related parts for A2918

A2918 Summary of contents

Page 1

... Special power-up sequencing is not required. Thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits. The A2918SWH/V are supplied in an 18-lead power-tab package with staggered lead forming. The tab is internally insulated from the device and requires no external isolation. The A2918SWH/V are available for operation from -40° ...

Page 2

... REF ÷10 ÷ 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 W Copyright © 1991, 1993, Allegro MicroSystems, Inc TSD 8 PHASE ENABLE 2 SOURCE DISABLE – ONE SHOT + ...

Page 3

Negative current is defined as coming out of (sourcing) the specified device pin. Typical Data is for design information only. www.allegromicro.com DUAL FULL-BRIDGE PWM MOTOR DRIVER ° ± 2918 µ µ µ µ µ ° ...

Page 4

... PHASE + I 0 OUT – The A2918SWH/V dual bridges are designed to drive both windings of a bipolar stepper motor. Output current is sensed and controlled independently in each bridge by an external sense resistor ( internal comparator, and an internal S monostable multivibrator. When the bridge is turned ON, current increases ...

Page 5

... REF The products described here are manufactured in Japan by Sanken Electric Co., Ltd. for sale by Allegro MicroSystems, Inc. Sanken Electric Co., Ltd. and Allegro MicroSystems, Inc. reserve the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of their products ...

Page 6

DUAL FULL-BRIDGE PWM MOTOR DRIVER 0.131 ø 0.120 0.637 0.623 0.033 0.022 3.35 ∅ 3.05 16.2 15.8 0.85 0.55 NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Lead spacing tolerance is non-cumulative. 1.228 ...

Page 7

NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Lead spacing tolerance is non-cumulative. www.allegromicro.com 1.228 1.213 0.968 0.953 0.653 0.126 ...

Page 8

DUAL FULL-BRIDGE PWM MOTOR DRIVER * Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or over-current protection voltage limits. Negative current is defined as coming out of (sourcing) the output. † ...

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