Overview
The L6205N from STMicroelectronics is a DMOS Dual Full Bridge Driver designed for motor control applications. It is realized in MultiPower-BCD technology, which combines 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 robust solution for driving bipolar stepper motors and dual or quad DC motors.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Supply Voltage (VS) | 8 | - | 52 | V |
| Output Peak Current (IOUT) | - | 5.6 | - | A |
| Output RMS Current (IOUT) | - | 2.8 | - | A |
| High-Side Switch ON Resistance (RDS(ON)) at Tj = 25°C | 0.34 | 0.4 | 0.53 | Ω |
| Low-Side Switch ON Resistance (RDS(ON)) at Tj = 25°C | 0.28 | 0.34 | 0.47 | Ω |
| Switching Frequency (fsw) | - | - | 100 kHz | - |
| Thermal Shutdown Temperature (Tj) | - | 165 | - | °C |
Key Features
- Non-dissipative overcurrent protection
- Thermal shutdown protection
- Cross conduction protection with dead time
- Integrated fast free-wheeling diodes
- Bootstrap voltage for driving upper PowerMOSFETs
- Paralleled operation capability for increased output current
- Under voltage lockout
- Logic inputs with hysteresis for noise immunity
Applications
The L6205N is typically used in applications involving bipolar stepper motors and dual or quad DC motors. It is suitable for various motor control scenarios where high current handling and robust protection mechanisms are required.
- Bipolar stepper motor control
- Dual or quad DC motor control
Q & A
- What is the operating supply voltage range of the L6205N?
The operating supply voltage range is from 8V to 52V.
- What is the peak output current of the L6205N?
The peak output current is 5.6A.
- What is the typical on-resistance of the high-side switch at 25°C?
The typical on-resistance of the high-side switch at 25°C is 0.4Ω.
- Does the L6205N have thermal shutdown protection?
Yes, the L6205N has thermal shutdown protection that activates at a junction temperature of 165°C.
- Can the outputs of the L6205N be paralleled?
Yes, the outputs can be paralleled to increase the output current capability or reduce power dissipation.
- What is the switching frequency limit of the L6205N?
The switching frequency limit is up to 100 kHz.
- Does the L6205N have integrated fast free-wheeling diodes?
Yes, the L6205N has integrated fast free-wheeling diodes.
- How does the overcurrent protection work in the L6205N?
The overcurrent protection is non-dissipative and uses a sensing element to detect overcurrent conditions without significant power dissipation.
- What is the recommended capacitor value for high frequency filtering on the power supply?
A high-quality ceramic capacitor in the range of 100 to 200 nF is recommended.
- How should unused logic pins be handled for noise immunity?
Unused logic pins should be connected to 5V (high logic level) or GND (low logic level) for noise immunity.
