Overview
The L6228Q device, produced by STMicroelectronics, is a DMOS fully integrated stepper motor driver. It is realized in BCD 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 a dual DMOS full bridge, a constant off-time PWM current controller, and a phase sequence generator. It is available in PowerSO36 and SO24 (20 + 2 + 2) packages, featuring non-dissipative overcurrent protection and thermal shutdown.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Supply Voltage | 8 | - | 52 | V |
| Output Peak Current | - | 2.8 A | - | A |
| Output RMS Current | - | 1.4 A | - | A |
| RDS(ON) | - | 0.73 Ω | - | Ω |
| Operating Frequency | - | - | 100 KHz | Hz |
| Thermal Shutdown Temperature | - | - | 165 °C | °C |
| Quiescent Supply Current | - | 5 mA | 10 mA | mA |
Key Features
- Operating supply voltage from 8 to 52 V
- 2.8 A output peak current (1.4 A RMS)
- RDS(ON) 0.73 Ω typical value at Tj = 25 °C
- Operating frequency up to 100 KHz
- Non-dissipative overcurrent protection
- Dual independent constant tOFF 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 L6228Q is specifically designed for driving bipolar stepper motors. It is suitable for various industrial and automotive applications where precise motor control is required.
Q & A
- What is the operating supply voltage range of the L6228Q?
The operating supply voltage range is from 8 V to 52 V. - What is the maximum output peak current of the L6228Q?
The maximum output peak current is 2.8 A. - What is the typical RDS(ON) value of the L6228Q at 25 °C?
The typical RDS(ON) value is 0.73 Ω. - What is the maximum operating frequency of the L6228Q?
The maximum operating frequency is up to 100 KHz. - Does the L6228Q have overcurrent protection?
Yes, it features non-dissipative overcurrent protection. - What types of decay modes are available in the L6228Q?
The device supports fast/slow decay mode selection. - Is thermal shutdown protection available in the L6228Q?
Yes, the device includes thermal shutdown protection. - What types of packages are available for the L6228Q?
The device is available in PowerSO36 and SO24 (20 + 2 + 2) packages. - Does the L6228Q have integrated freewheeling diodes?
Yes, it includes integrated fast freewheeling diodes. - What is the thermal shutdown temperature of the L6228Q?
The thermal shutdown temperature is 165 °C.
