Overview
The L298HN, produced by STMicroelectronics, is an integrated monolithic circuit designed as a high-voltage, high-current dual full-bridge driver. It is available in 15-lead Multiwatt and PowerSO20 packages. This component is capable of accepting standard TTL logic levels and driving inductive loads such as relays, solenoids, DC motors, and stepping motors. The L298HN features two enable inputs that allow the device to be enabled or disabled independently of the input signals, and it includes an additional supply input for logic operations at a lower voltage.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage | Up to 46 | V |
| Total DC Current | Up to 4 | A |
| Peak Output Current (Non-Repetitive) | 3 | A |
| Peak Output Current (Repetitive) | 2.5 | A |
| DC Operation Current | 2 | A |
| Logical '0' Input Voltage | Up to 1.5 | V |
| Overtemperature Protection | Yes | |
| Junction Operating Temperature | -25 to 130 | °C |
| Storage and Junction Temperature | -40 to 150 | °C |
Key Features
- Operating supply voltage up to 46 V
- Total DC current up to 4 A
- Low saturation voltage
- Logical '0' input voltage up to 1.5 V (high noise immunity)
- Overtemperature protection
- TTL compatible inputs
- Two enable inputs for independent control of each bridge
- External sensing resistor connection for current monitoring
- Additional supply input for logic operations at a lower voltage
Applications
- Dual brush DC motors
- Stepper motors
- Relays and solenoids
- Bidirectional DC motor control
- Two-phase bipolar stepper motor control
Q & A
- What is the maximum operating supply voltage of the L298HN?
The maximum operating supply voltage is up to 46 V.
- What is the total DC current capacity of the L298HN?
The total DC current capacity is up to 4 A.
- Does the L298HN have overtemperature protection?
Yes, the L298HN includes overtemperature protection.
- What type of inputs does the L298HN support?
The L298HN supports TTL compatible inputs.
- How can the L298HN be controlled independently for each bridge?
The L298HN has two enable inputs that allow independent control of each bridge.
- What is the purpose of the external sensing resistor connection?
The external sensing resistor connection is used for monitoring the current through the load.
- Can the L298HN drive inductive loads?
Yes, the L298HN is designed to drive inductive loads such as relays, solenoids, DC motors, and stepping motors.
- What is the junction operating temperature range of the L298HN?
The junction operating temperature range is -25 to 130 °C.
- How can the L298HN be used for bidirectional DC motor control?
The L298HN can be used for bidirectional DC motor control by configuring the inputs and enable signals appropriately, as shown in the datasheet.
- Can the outputs of the L298HN be paralleled for higher current requirements?
Yes, the outputs can be paralleled to drive higher currents, but care must be taken to parallel the correct channels.
