A3968SLBT Allegro Micro Systems, Inc., A3968SLBT Datasheet

A3968SLBT

Manufacturer Part Number

A3968SLBT

Description

SOP-16

Manufacturer

Allegro Micro Systems, Inc.

Datasheet

1.A3968SLBT.pdf (10 pages)

Specifications of A3968SLBT

Date_code

08+

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Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

A3968SLBT

Manufacturer:

ALLEGRO/雅丽高

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

A3968SLBTR

Manufacturer:

ALLEGRO/雅丽高

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

A3968SLBTR-T

Manufacturer:

ALLEGRO/雅丽高

Quantity:

20 000

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ABSOLUTE MAXIMUM RATINGS

REFERENCE

Load Supply Voltage, V

Output Current, I

Logic Supply Voltage, V

Input Voltage, V

Sense Voltage, V

Package Power Dissipation (T

Operating Temperature Range,

Junction Temperature,

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.

* Per SEMI G42-88 Specification, Thermal Test

Board Standardization for Measuring Junction-

to-Ambient Thermal Resistance of Semiconductor

Packages.

DUAL FULL-BRIDGE PWM MOTOR DRIVER WITH BRAKE

GROUND

INPUT

SUPPLY

SENSE

(continuous) .............................. ±650 mA

A3968SA ..................................... 1.8 W*

A3968SLB ................................... 1.4 W*

OUT

LOAD

................................................. +150°C

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

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

A3968SLB (SOIC)

REF

LOGIC

OUT

..... -0.3 V to V

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

(peak) .......... ±750 mA

LOGIC

................... 30 V

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

= 25°C), P

Dwg. PP-066

OUT

INPUT

GROUND

SENSE

LOGIC

SUPPLY

OUT

+ 0.3 V

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: A3968SA, A3968SLB, and A3968SLBTR.

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

3968

dc motors. Each device includes two H-bridges capable of continuous output

currents of ±650 mA and operating voltages to 30 V. Motor winding current

can be controlled by the internal fixed-frequency, pulse-width modulated

(PWM), current-control circuitry. The peak load current limit is set by the

user’s selection of a reference voltage and current-sensing resistors. Except

for package style and pinout, the two devices are identical.

timing network. 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.

been optimized for low saturation voltages. The sink drivers feature the

Allegro

combine the low voltage drop of a saturated transistor and the high peak

current capability of a Darlington.

current polarity by enabling the appropriate source and sink driver pair. When

a logic low is applied to both INPUTs of a bridge, the braking function is

enabled. In brake mode, both source drivers are turned OFF and both sink

drivers are turned ON, thereby dynamically braking the motor. When a logic

high is applied to both INPUTs of a bridge, all output drivers are disabled.

Special power-up sequencing is not required. Internal circuit protection

includes thermal shutdown with hysteresis, ground-clamp and flyback diodes,

and crossover-current protection.

A3968SLB is supplied in a 16-pin plastic SOIC with copper heat sink tabs.

The power tab is at ground potential and needs no electrical isolation. The LB

package is available in a lead (Pb) free version (100% matte tin leadframe).

FEATURES

A3968SLBTR-T

A3968SLB-T

Part Number

±650 mA Continuous Output Current

30 V Output Voltage Rating

Internal Fixed-Frequency PWM Current Control

Satlington Sink Drivers

Brake Mode

User-Selectable Blanking Window

Internal Ground-Clamp & Flyback Diodes

Internal Thermal-Shutdown Circuitry

Crossover-Current Protection and UVLO Protection

The A3968SA and A3968SLB are designed to bidirectionally control two

The fixed-frequency pulse duration is set by a user-selected external RC

To reduce on-chip power dissipation, the H-bridge power outputs have

For each bridge, the INPUT

The A3968SA is supplied in a 16-pin dual in-line plastic package. The

patented Satlington

Pb-free*

Yes

(°C/W)

θJA

(°C/W)

output structure. The Satlington outputs

θJT

and INPUT

16-Lead SOIC

Package

terminals determine the load

1000 per reel

47 per tube

Packing

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