SIL6258EX Motor Driver Overview
The SIL6258EX is a PWM controlled high current DMOS universal motor driver capable of driving a bipolar stepper motor’s both windings or two DC motors. Its robust design, featuring output currents up to 1.5A per winding and operation within a wide voltage range of 12V to 40V, caters to various motor control applications. The datasheet introduces the key features, device summary, and a brief functional description of this motor driver.
Features of SIL6258EX
Highlighting its advanced technological capabilities, the SIL6258EX offers four quadrant current control, which is essential for high precision in microstepping and DC motor management. Furthermore, the integrated precision PWM control eliminates the need for recirculation diodes while ensuring compatibility with TTL/CMOS inputs. A key selling point is the cross conduction protection complemented with a thermal shutdown feature, safeguarding the device during excessive heat conditions.
Power Stage and Protection Mechanisms
The power stage, designed as a dual DMOS full bridge, delivers a robust capability to handle up to 40V, including built-in diodes for current recirculation. The driver can maintain a steady output current of 1.5A per winding in continuous mode, and it is equipped to handle peak start-up currents up to 2A. Softening concerns regarding thermal overload, the datasheet specifies thermal protection circuitry designed to disable outputs when the chip temperature crosses safe thresholds.
Target Applications and Packaging Options
With the use of BCD technology, the L6258EX is presented as an efficient solution for a full bridge dual motor control. Aimed at applications that require the driving of bipolar stepper motors or bidirectional control of DC motors, the chipset necessitates only a handful of external components to form a complete control and drive circuit. Delivering high efficiency and minimal current ripple at the lowest control levels, the device is well-suited for both stepper and DC motors.
The datasheet also provides packaging information referencing two product codes: E-L6258EX which comes in a tube packaging and E-L6258EXTR which is supplied on tape and reel. This flexibility facilitates ease of integration into various manufacturing processes and product designs.
Complementary Information
Further information available on the datasheet includes an extensive functional description, block diagrams, application notes, and package details. Readers interested in a deep technical understanding of the SIL6258EX driver’s inner workings and application considerations will find value in sections addressing the current control loop, power amplifier operation, load attenuation, error and sense amplifier intricacies, and the stability impact of back electromotive force (Bemf).
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