A3955SB - Allegro MicroSystems

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

A3955SB
Manufacturer

Allegro MicroSystems
ChipWorker Part#

CW135846070
Category

Motor Driver
Package

PowerDIP-16
Description

Full Bridge PWM Motor Driver 5V 16Pin(14+2Tab) PDIP Bat
Documentation

Datasheet

A3955SB Global Supplier

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A3955SB Specifications

Attribute	Attribute Value

Part Number	A3955SB
Manufacturer	Allegro MicroSystems
ChipWorker Part#	CW135846070
Category	Motor Driver
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	16 Pin
Case/Package	PowerDIP-16
Supply Voltage (DC)	4.50V (min)
Output Current	1.5 A
Supply Voltage	4.5V ~ 5.5V
	expand all
Operating Temperature	-20℃ ~ 150℃ (TJ)
Product Lifecycle Status	Obsolete
Packaging	Tube
RoHS	Non-Compliant
Lead-Free Status	Contains Lead

Product Description

Description
The A3955 is designed to drive one winding of a bipolar stepper motor in a microstepping mode. The outputs are rated for continuous output currents to ±1.5 A and operating voltages to 50 V. Internal pulse width modulated (PWM) current control combined with an internal three-bit nonlinear digital to-analog converter allows the motor current to be controlled in full-, half-, quarter-, or eighth-step (microstepping) modes. Nonlinear increments minimize the number of control lines necessary for microstepping. Microstepping provides increased step resolution, and reduces torque variations and resonance problems at low speed.
Features and Benefits
▪ ±1.5 A continuous output current
▪ 50 V output voltage rating
▪ Internal PWM current control
▪ 3-bit nonlinear DAC
▪ Fast, mixed fast/slow, and slow current-decay modes
▪ Internal transient-suppression diodes
▪ Internal thermal shutdown circuitry
▪ Crossover-current and UVLO protection

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