A3964SLBTRT Allegro Micro Systems, Inc., A3964SLBTRT Datasheet

A3964SLBTRT

Manufacturer Part Number

A3964SLBTRT

Description

SOIC20

Manufacturer

Allegro Micro Systems, Inc.

Datasheet

1.A3964SLBTRT.pdf (10 pages)

Specifications of A3964SLBTRT

Date_code

06+

Current page: 1 of 10
Download datasheet (263Kb)

Load Supply Voltage, V

Output Current, I

Logic Supply Voltage, V

Logic Input Voltage Range,

Sense Voltage, V

Reference Output Current,

Package Power Dissipation,

Operating Temperature Range,

Junction Temperature, T

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 current rating

or a junction temperature of 150°C.

† Fault conditions that produce excessive junction

temperature will activate the device’s thermal shutdown

circuitry. These conditions can be tolerated but should

be avoided.

ABSOLUTE MAXIMUM RATINGS

GROUND

ENABLE

SENSE

SUPPLY

PHASE

OUT

REF(IN)

LOAD

(continuous) . . . . . . . . . . . . . ±800 mA*

REF(OUT)

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

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

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

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

. . . . . . . . . . . . . . . . . . 1.0 mA

A3964SLB

OUT

. . . . . . . . . . . . . . . 1.0 V

(10 µs) . . . . . . ±1.0 A*

. . . . . .

. . . . . . . . . 33 V

. . . . . . . . . 7.0 V

DUAL FULL-BRIDGE PWM MOTOR DRIVER

+150½°†

Dwg. PP-047-1

OUT

LOGIC

SUPPLY

GROUND

PHASE

SENSE

GROUND

ENABLE

+ 0.3 V

REF(OUT)

3964

footnote are in production but have been determined to be LAST TIME BUY. This

classification indicates that sale of this device is currently restricted to existing

customer applications. The variants should not be purchased for new design

applications because obsolescence in the near future is probable. Samples are no

longer available. Status change: October 31, 2006. Deadline for receipt fo LAST TIME

BUY orders: April 27, 2007. These variants include: A3964SB, A3964SLB, and

A3964SLBTR.

stepper motors, the A3964SB and A3964SLB are capable of continuous

output currents to ±800 mA and operating voltages to 30 V. Internal fixed

off-time PWM current-control circuitry can be used to regulate the maximum

load current to a desired value. An internal precision voltage reference is

provided to improve motor peak-current control accuracy. The peak load

current limit is set by the user’s selection of an external resistor divider and

current-sensing resistors.

timing networks. The capacitor in the RC timing network also determines a

user-selectable blanking window that prevents false triggering of the PWM

current control circuitry during switching transitions. This eliminates the need

for two external RC filter networks on the current-sensing comparator inputs.

selecting the appropriate source and sink driver pair. For each bridge the

ENABLE input, when held high, disables the output drivers. Special power-

up sequencing is not required. Internal circuit protection includes thermal

shutdown with hysteresis, transient-suppression diodes, and crossover-current

protection.

tabs; A3964SLB is supplied in a 20-lead plastic SOIC with copper heat sink

tabs, and is available in a lead (Pb) free version with 100% matte tin

leadframe plating. The power tabs are at ground potential and need no

electrical isolation.

FEATURES

Pb-based variants are being phased out of the product line. The variants cited in this

A3964SLBTR-T

A3964SLB-T

Part Number

±800 mA Continuous Output Current Rating

30 V Output Voltage Rating

Internal PWM Current Control, Saturated Sink Drivers

Internally Generated, Precision 2.5 V Reference

Internal Transient-Suppression Diodes

Internal Thermal-Shutdown Circuitry

Crossover-Current Protection, UVLO Protection

Designed for pulse-width modulated (PWM) current control of bipolar

The fixed off-time pulse duration is set by user-selected external RC

For each bridge the PHASE input controls load current polarity by

The A3964SB is supplied in a 24-pin plastic DIP with copper heat sink

Pb-free*

Yes

20-Lead SOIC

Package

1000 per reel

37 per tube

Packing

Related parts for A3964SLBTRT

Related keywords

A3964SLBTRT datasheet
A3964SLBTRT data sheet
A3964SLBTRT pdf datasheet
A3964SLBTRT component
A3964SLBTRT part
A3964SLBTRT distributor
A3964SLBTRT RoHS
A3964SLBTRT datasheet download