The A4984 is a complete microstepping motor driver with built-in translator for easy operation. It is designed to operate bipolar stepper motors in full-, half-, quarter-, and eighth-step modes. Step modes are selectable by MSx logic inputs. It has an output drive capacity of up to 35 V and ±2 A. The A4984 includes a fixed off-time current regulator which has the ability to operate in slow or mixed decay modes.
The ET package meets customer requirements for no smoke no fire (NSNF) designs by adding no-connect pins between critical output, sense, and supply pins. So, in the case of a pin-to-adjacent-pin short, the device does not cause smoke or fire. Additionally, the device does not cause smoke or fire when any pin is shorted to ground or left open.
The translator is the key to the easy implementation of the A4984. Simply inputting one pulse on the STEP input drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program. The A4984 interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened.
During stepping operation, the chopping control in the A4984 automatically selects the current decay mode, Slow or Mixed. In Mixed decay mode, the device is set initially to a fast decay for a proportion of the fixed off-time, then to a slow decay for the remainder of the off-time. Mixed decay current control results in reduced audible motor noise, increased step accuracy, and reduced power dissipation.
Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection. Special power-on sequencing is not required.
The A4984 is supplied in three surface mount packages: two QFN packages, the 4 mm × 4 mm, 0.75 mm nominal overall height ES package, and the 5 mm × 5 mm × 0.90 mm ET package. The LP package is a 24-pin TSSOP. All three packages have exposed pads for enhanced thermal dissipation, and are lead (Pb) free (suffix –T), with 100% matte tin plated leadframes.
IC MTR DRVR BIPOLAR 3-5.5V 32QFN
IC MTR DRVR BIPOLAR 3-5.5V 32QFN
Bipolar Motor Driver DMOS Logic 32-QFN (5x5)
Bipolar Motor Driver DMOS Logic 32-QFN (5x5)
Bipolar Motor Driver DMOS Logic 32-QFN (5x5)
Manufacturer: Allegro MicroSystems, LLC
Win Source Part Number: 007713-A4984SETTR-T
Packaging: Reel - TR
Applications: General Purpose
Mounting: SMD (SMT)
Technology: DMOS
Output Current: 2A
Voltage - Load: 8 V to 35 V
Motor Type - Stepper: Bipolar
Step Resolution: 1, 1/2, 1/4, 1/8
Categories: Integrated Circuits
Status: Active
Temperature Range - Operating: -20°C to 150°C (TJ)
Case / Package: 32-QFN (5x5)
Purpose: Driver - Fully Integrated, Control and Power Stage
Supply Voltage - Operating: 3 V to 5.5 V
Popularity: Medium
Fake Threat In the Open Market: 50 pct.
Supply and Demand Status: Balance
Bipolar Motor Driver DMOS Logic 32-QFN (5x5)
Allegro MicroSystems Inc. | Shenzhen Shengyu Electronics Technology Limited | Lingto Electronic Limited | DigiKey | Win Source Electronics | Quarktwin Technology Ltd. | |
---|---|---|---|---|---|---|
Product Category | Stepper Motor Drives | Motor Controllers | Motor Controllers | DC Motor Drives | Motion Controllers | Motor Controllers |
Product Number | A4984SETTR-T | A4984SETTR-T | A4984SETTR-T | 620-1455-2-ND | 007713-A4984SETTR-T | A4984SETTR-T |
Product Name | 2A Dual Full Bridge 1/8 Microstep Driver W/Ocp | Integrated Circuits (ICs) - Power Management (PMIC) - Motor Drivers, Controllers | PMIC - Motor Drivers, Controllers | Motor Drivers, Controllers | PMIC - PMIC - Motor Drivers, Controllers - A4984SETTR-T | Motor Drivers, Controllers |
Motor / System | Microstepping Motor | |||||
Configuration | PCB Mount | PCB Mount; 32-VFQFN Exposed Pad | ||||
Peak Current | 2 amps | |||||
Communication | Logic | Logic | ||||
Operating Temperature | -20 to 150 C (-4 to 302 F) | -20 to 150 C (-4 to 302 F) | -20 to 150 C (-4 to 302 F) |