Product Overview:

The SLA-7026M is a high-performance unipolar stepper motor driver IC manufactured by Sanken Electric Co., Ltd. It features a ZIP-23 package and integrates a 4-channel Darlington transistor array with built-in clamp diodes, specifically designed for driving unipolar stepper motors. This device delivers a maximum output current of 3A per channel with a breakdown voltage of 46V, making it suitable for medium- to high-power stepper motor drive applications.

The Darlington configuration of the SLA-7026M provides extremely high current gain, allowing direct interfacing with 5V TTL/CMOS logic levels without the need for external pre-driver stages. The integrated clamp diodes effectively suppress inductive kickback voltage generated during motor switching, significantly enhancing system stability and reliability. The device is housed in a ZIP-23 (Zigzag Inline Package), which offers excellent thermal dissipation and is well-suited for continuous long-term operation.

With its proven design and high reliability, the SLA-7026M is widely used in office automation (printers, scanners), industrial automation (CNC machines, robotics), security surveillance (PTZ camera control), and vending machines, maintaining its classic status in the motor driver market for many years.

Product Features:

4-Channel Darlington Transistor Array: Integrates 4 independent drive channels, suitable for driving 2-phase or 4-phase unipolar stepper motors.

High Output Current: Maximum output current of 3A per channel, ideal for medium-power motors.

High Breakdown Voltage: Maximum rated voltage of 46V, safely drives 24V–36V stepper motors.

Built-in Clamp Diodes: Each channel integrates a reverse clamp diode to effectively suppress inductive kickback, protecting the driver and system circuitry.

High Current Gain: Darlington structure provides extremely high current gain (typical hFE ≥ 1000), enabling direct drive from MCU I/O or logic ICs.

Low Saturation Voltage: Low output saturation voltage reduces power loss and heat generation.

Compact ZIP-23 Package: 23-pin zigzag inline package with optimized pin spacing for easy PCB routing and heatsink installation.

Wide Operating Temperature Range: Supports –40°C to +85°C ambient temperature, suitable for industrial and commercial applications.

High Reliability: Sanken's reputation for automotive and industrial-grade quality ensures rigorous reliability validation.

Mature and Stable: This model has been market-proven for many years and is widely used in various motor drive products.

Applications:

Office Automation Equipment (OA):

Carriage and paper-feed motor driving in dot-matrix printers, thermal printers, and label printers.

Stepper motor driving in scanners and fax machines.

Industrial Automation:

Stepper motor driving in small CNC machines and engraving machines.

Actuator driving in industrial robots and robotic arms.

Precision positioning control in pick-and-place machines and automatic insertion equipment.

Security Surveillance:

Pan/tilt stepper motor driving in high-speed dome cameras (PTZ).

Motor control in intelligent access control systems.

Commercial Equipment:

Dispensing mechanism driving in vending machines and ticket machines.

Transmission mechanism control in bank ATMs.

Consumer Electronics & Entertainment:

Haptic feedback motor driving in gaming consoles and driving simulators.

Precision motion control modules in medical devices (e.g., infusion pumps).