A3967SLBTR-T Allegro, A3967SLBTR-T Datasheet

A3967SLBTR-T

Manufacturer Part Number

A3967SLBTR-T

Description

Manufacturer

Allegro

Datasheets

1.A3967SLBTR-T.pdf (15 pages)

2.A3967SLBTR-T.pdf (16 pages)

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Part Number

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Quantity

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Bonase Electronics (HK) Co., Limited

Part Number:

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Manufacturer:

CRYDOM

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BOSTOCK HK LIMITED

Part Number:

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Manufacturer:

ALLEGRO/PBF

Quantity:

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Company:

BOSTOCK HK LIMITED

Part Number:

A3967SLBTR-T

Manufacturer:

ALLEGRO

Quantity:

8 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

A3967SLBTR-T

Manufacturer:

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Features and Benefits

▪ ±750 mA, 30 V output rating

▪ Satlington® sink drivers

▪ Automatic current-decay mode detection/selection

▪ 3.0 to 5.5 V logic supply voltage range

▪ Mixed, fast, and slow current-decay modes

▪ Internal UVLO and thermal shutdown circuitry

▪ Crossover-current protection

Package: 24-pin SOIC with internally

fused pins (suffix LB)

26184.24G

Not to scale

SUPPLY

LOGIC

REF.

ENABLE

RESET

SLEEP

STEP

REF

DIR

PFD

÷8

DETECT

FAULT

UVLO

AND

DAC

Functional Block Diagram

PWM LATCH

BLANKING

MIXED DECAY

PWM LATCH

BLANKING

MIXED DECAY

PWM TIMER

Microstepping Driver with Translator

SENSE

Description

The A3967 is a complete microstepping motor driver with built-

in translator. It is designed to operate bipolar stepper motors in

full-, half-, quarter-, and eighth-step modes, with output drive

capability of 30 V and ±750 mA. The A3967 includes a fixed

off-time current regulator that has the ability to operate in slow,

fast, or mixed current-decay modes. This current-decay control

scheme results in reduced audible motor noise, increased step

accuracy, and reduced power dissipation.

The translator is the key to the easy implementation of the

A3967. By simply inputting one pulse on the STEP input the

motor will take one step (full, half, quarter, or eighth depending

on two logic inputs). There are no phase-sequence tables, high-

frequency control lines, or complex interfaces to program. The

A3967 interface is an ideal fit for applications where a complex

μP is unavailable or over-burdened.

Internal circuit protection includes thermal shutdown with

hysteresis, under-voltage lockout (UVLO) and crossover-

current protection. Special power-up sequencing is not

required.

The A3967 is supplied in a 24-pin SOIC, which is lead (Pb)

free with 100% matte tin leadframe plating. Four pins are

fused internally for enhanced thermal dissipation. The pins

are at ground potential and need no insulation.

SENSE

OUT

SENSE

OUT

BB1

BB2

Dwg. FP-050-3A

SUPPLY

LOAD

A3967

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