Overview
The L6258EX is a PWM-controlled, high-current DMOS universal motor driver produced by STMicroelectronics. It is designed for motor control applications and is realized in BCD (Bipolar-CMOS-DMOS) technology. This device is capable of driving both windings of a bipolar stepper motor or bidirectionally controlling two DC motors. With a few external components, the L6258EX forms a complete control and drive circuit, making it ideal for both stepper and DC motor applications due to its high efficiency phase shift chopping and low current ripple at low current control levels.
Key Specifications
| Parameter | Description | Value | Unit |
|---|---|---|---|
| Vs (Supply voltage) | Maximum supply voltage | 45 | V |
| VDD (Logic supply voltage) | Logic supply voltage | 7 | V |
| Vref1/Vref2 (Reference voltage) | Reference voltage | 2.5 | V |
| IO (Output current - peak) | Peak output current (non-repetitive for 1 second) | 2 | A |
| IO (Output current - continuous) | Continuous output current per winding | 1.5 | A |
| Vin (Logic input voltage range) | Logic input voltage range | -0.3 to 7 | V |
| Vboot (Bootstrap supply) | Bootstrap supply voltage | 60 | V |
| Tj (Junction temperature) | Junction temperature | 150 | °C |
| Tstg (Storage temperature range) | Storage temperature range | -55 to 150 | °C |
Key Features
- Able to drive both windings of a bipolar stepper motor or two DC motors
- Wide voltage range: 12V to 40V
- Output current up to 1.5A each winding
- Precision PWM control
- No need for recirculation diodes
- TTL/CMOS compatible inputs
- Thermal shutdown protection
- Cross conduction protection
- Four quadrant current control, ideal for microstepping and DC motor control
Applications
The L6258EX is suitable for a variety of motor control applications, including:
- Bipolar stepper motor control
- Bidirectional control of two DC motors
- Microstepping applications
- General-purpose motor control where high current and precision are required
Q & A
- What is the maximum supply voltage for the L6258EX?
The maximum supply voltage for the L6258EX is 45V. - What is the continuous output current capability per winding?
The continuous output current capability per winding is 1.5A. - Does the L6258EX require external recirculation diodes?
No, the L6258EX does not require external recirculation diodes as they are included in the device. - What is the operating temperature range for the L6258EX?
The operating temperature range for the L6258EX is -55°C to 150°C. - Is the L6258EX compatible with TTL/CMOS logic inputs?
Yes, the L6258EX is TTL/CMOS compatible. - What type of protection does the L6258EX have against overheating?
The L6258EX has thermal shutdown protection to prevent overheating. - Can the L6258EX be used for microstepping applications?
Yes, the L6258EX is ideal for microstepping applications due to its four quadrant current control. - What is the package type for the L6258EX?
The L6258EX is available in the PowerSO36 package. - Is the L6258EX RoHS compliant?
Yes, the L6258EX is RoHS compliant with an Ecopack2 grade. - What is the maximum peak start-up current for the L6258EX?
The maximum peak start-up current for the L6258EX is 2A.
