Overview
The L6225DTR, produced by STMicroelectronics, is a DMOS Dual Full Bridge driver designed for motor control applications. It is realized in MultiPower-BCD technology, which integrates isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. This device is available in PowerDIP20, PowerSO20, and SO20 packages, offering a comprehensive solution for driving bipolar stepper motors and dual or quad DC motors.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage (VS) | VSA = VSB = VS | 8 | - | 52 | V |
| Output Peak Current (IOUT) | - | - | 2.8A | - | A |
| RDS(ON) | Tj = 25 °C | 1.47 | 1.69 | 2.35 | Ω |
| Switching Frequency (fsw) | - | - | 100 kHz | - | - |
| Operating Junction Temperature (Tj) | - | -25 | - | 125 | °C |
| Thermal Shutdown Temperature (Tj(OFF)) | - | - | 165 | - | °C |
Key Features
- Non-dissipative overcurrent protection
- Cross conduction protection with a dead time of 1 µs typical
- Thermal shutdown with a threshold of 165°C typical
- Under voltage lockout
- Integrated fast free-wheeling diodes
- Paralleled operation capability to increase output current or reduce power dissipation
- Charge pump circuit for bootstrap supply
- TTL/CMOS compatible logic inputs
Applications
The L6225DTR is typically used in motor control applications, including:
- Bipolar stepper motors
- Dual or quad DC motors
It is also suitable for other applications requiring high current and high frequency switching, such as in robotics, industrial automation, and automotive systems.
Q & A
- What is the operating supply voltage range of the L6225DTR?
The operating supply voltage range is from 8V to 52V.
- What is the peak output current of the L6225DTR?
The peak output current is 2.8A, with a DC current of 1.4A.
- What is the typical RDS(ON) value of the L6225DTR at 25°C?
The typical RDS(ON) value is 0.73Ω.
- What is the maximum switching frequency of the L6225DTR?
The maximum switching frequency is up to 100 kHz.
- Does the L6225DTR have thermal shutdown protection?
- How does the overcurrent protection work in the L6225DTR?
The overcurrent protection is non-dissipative and uses an internal overcurrent detection circuit that senses the output current and triggers a fault condition when the current exceeds the detection threshold.
- Can the outputs of the L6225DTR be paralleled?
- What type of logic inputs does the L6225DTR have?
The L6225DTR has TTL/CMOS compatible logic inputs.
- What is the purpose of the charge pump circuit in the L6225DTR?
The charge pump circuit is used to generate a bootstrap supply for the high-side power MOSFETs.
- What are the recommended package types for the L6225DTR?
The L6225DTR is available in PowerDIP20, PowerSO20, and SO20 packages.
