Overview
The L298N is an integrated monolithic circuit produced by STMicroelectronics, designed as a high-voltage, high-current dual full-bridge driver. It is available in 15-lead Multiwatt and PowerSO20 packages. This driver is capable of accepting standard TTL logic levels and driving inductive loads such as relays, solenoids, DC motors, and stepper motors. The device features two enable inputs that allow for independent control of the bridges, and it includes an additional supply input for the logic section to operate at a lower voltage than the power section.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage | Up to 46 | V |
| Total DC Current | Up to 4 | A |
| Logical '0' Input Voltage | Up to 1.5 | V |
| Peak Output Current (Non-repetitive, t = 100 ms) | 3 | A |
| Peak Output Current (Repetitive, 80% on – 20% off; ton = 10 ms) | 2.5 | A |
| DC Operation Current | 2 | A |
| Overtemperature Protection | Yes | |
| Thermal Resistance Junction-Case (Power SO20) | 3 | °C/W |
| Thermal Resistance Junction-Ambient (Power SO20) | 13 | °C/W |
| Storage and Junction Temperature | -40 to 150 | °C |
Key Features
- High voltage and high current capabilities
- Low saturation voltage
- Overtemperature protection
- Logical '0' input voltage up to 1.5 V for high noise immunity
- TTL compatible inputs
- Two enable inputs for independent bridge control
- External sensing resistor connection for current monitoring
- Additional supply input for logic section
Applications
The L298N is versatile and can be used in various applications, including:
- Dual brush DC motors
- Stepper motors
- Relays and solenoids
- Inductive load control in common or differential mode
Q & A
- What is the maximum operating supply voltage of the L298N?
The maximum operating supply voltage is up to 46 V. - What is the total DC current capability of the L298N?
The total DC current capability is up to 4 A. - Does the L298N have overtemperature protection?
Yes, the L298N includes overtemperature protection. - What type of logic levels does the L298N accept?
The L298N accepts standard TTL logic levels. - What types of loads can the L298N drive?
The L298N can drive inductive loads such as relays, solenoids, DC motors, and stepper motors. - How many enable inputs does the L298N have?
The L298N has two enable inputs. - What is the purpose of the additional supply input on the L298N?
The additional supply input allows the logic section to operate at a lower voltage than the power section. - How is the current through the load monitored in the L298N?
The current through the load can be monitored using an external sensing resistor connected to the emitters of the lower transistors of each bridge. - What is the thermal resistance junction-case for the Power SO20 package?
The thermal resistance junction-case for the Power SO20 package is 3 °C/W. - What is the storage and junction temperature range for the L298N?
The storage and junction temperature range is -40 to 150 °C.
