Overview
The L6208D device, produced by STMicroelectronics, is a DMOS fully integrated stepper motor driver designed to drive two-phase bipolar stepper motors. It utilizes BCD technology, combining isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. This device includes a dual DMOS full bridge, a constant off-time PWM current controller, and a phase sequence generator, making it a comprehensive solution for stepper motor control. Available in PowerSO36 and SO24 packages, the L6208D features advanced protection mechanisms such as non-dissipative overcurrent protection and thermal shutdown.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage | 8 to 52 | V |
| Output Peak Current | 5.6 A (2.8 A RMS) | A |
| RDS(ON) | 0.3 Ω (typ. at Tj = 25 °C) | Ω |
| Operating Frequency | Up to 100 KHz | KHz |
| Thermal Shutdown Temperature | 165 °C | °C |
| Package Types | PowerSO36, SO24 (20 + 2 + 2) | - |
Key Features
- Non-dissipative overcurrent protection on high-side power MOSFETs
- Dual independent constant off-time PWM current controllers
- Fast/slow decay mode selection
- Fast decay quasi-synchronous rectification
- Decoding logic for stepper motor full and half step drive
- Cross conduction protection
- Thermal shutdown
- Undervoltage lockout
- Integrated fast freewheeling diodes
Applications
The L6208D is primarily used in applications involving bipolar stepper motors, such as industrial automation, personal electronics, and any system requiring precise motor control. It is particularly useful in scenarios where high current handling and advanced protection features are necessary.
Q & A
- What is the operating supply voltage range of the L6208D?
The operating supply voltage range is from 8 to 52 V. - What is the maximum output peak current of the L6208D?
The maximum output peak current is 5.6 A (2.8 A RMS). - What is the typical RDS(ON) value of the L6208D at 25 °C?
The typical RDS(ON) value is 0.3 Ω. - What is the maximum operating frequency of the L6208D?
The maximum operating frequency is up to 100 KHz. - Does the L6208D have thermal shutdown protection?
Yes, the L6208D features thermal shutdown protection with a shutdown temperature of 165 °C. - What types of packages are available for the L6208D?
The L6208D is available in PowerSO36 and SO24 (20 + 2 + 2) packages. - What kind of logic inputs does the L6208D support?
The L6208D supports TTL/CMOS compatible logic inputs. - Does the L6208D support both full and half step drive modes?
Yes, the L6208D supports both full and half step drive modes for stepper motors. - What is the purpose of the phase sequence generator in the L6208D?
The phase sequence generator provides the phase and enable inputs for the two bridges to drive a stepper motor in either full step or half step mode. - Does the L6208D have integrated fast freewheeling diodes?
Yes, the L6208D includes integrated fast freewheeling diodes.
