Overview
The L6208Q device, manufactured by STMicroelectronics, is a DMOS fully integrated stepper motor driver. It is realized in BCDmultipower technology, which combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. This device is designed to drive two-phase bipolar stepper motors and includes all necessary circuitry such as a dual DMOS full bridge, a constant OFF time PWM current controller, and a phase sequence generator. The L6208Q is available in a VFQFPN48 7 x 7 mm package and features 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 | A |
| RDS(ON) | 0.3 Ω (typ. at Tj = 25 °C) | Ω |
| Operating Frequency | Up to 100 kHz | kHz |
| Thermal Shutdown Temperature | 165 °C (typ.) | °C |
| Package | VFQFPN48 (7 x 7 x 1.0 mm) |
Key Features
- Non-dissipative overcurrent protection
- Dual independent constant tOFF PWM current controllers
- Fast/slow decay synchronous rectification and 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 L6208Q is primarily used for driving bipolar stepper motors in various industrial and automotive applications. It is suitable for systems requiring precise motor control, high current handling, and robust protection features.
Q & A
- What is the operating supply voltage range of the L6208Q?
The operating supply voltage range is from 8 to 52 V. - What is the maximum output peak current of the L6208Q?
The maximum output peak current is 5.6 A. - What is the typical RDS(ON) value of the L6208Q at 25 °C?
The typical RDS(ON) value is 0.3 Ω. - What is the maximum operating frequency of the L6208Q?
The maximum operating frequency is up to 100 kHz. - Does the L6208Q have thermal shutdown protection?
Yes, the L6208Q has thermal shutdown protection that activates at a junction temperature of 165 °C (typ.). - What type of rectification modes does the L6208Q support?
The L6208Q supports fast/slow decay synchronous rectification and fast decay quasi-synchronous rectification. - How does the L6208Q protect against overcurrent?
The L6208Q features non-dissipative overcurrent protection using an internal sensing element that detects when the output current exceeds a certain threshold. - What is the package type of the L6208Q?
The L6208Q is available in a VFQFPN48 (7 x 7 x 1.0 mm) package. - Does the L6208Q support half-step and full-step drive modes?
Yes, the L6208Q supports both half-step and full-step drive modes for stepper motors. - How does the L6208Q handle cross conduction?
The L6208Q implements cross conduction protection using a deadtime (tDT = 1 µs typical value) between the turn-off and turn-on of two power MOSFETs in one leg of a bridge.
