Overview
The L6228QTR, produced by STMicroelectronics, is a DMOS fully integrated stepper motor driver designed to drive two-phase bipolar stepper motors. It is realized in BCDmultipower technology, which combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. This device includes all the necessary circuitry for stepper motor operation, such as a dual DMOS full bridge, a constant off-time PWM current controller, and a phase sequence generator. The L6228QTR is available in a VFQFPN32 5 mm x 5 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 | 2.8 A (1.4 A RMS) | A |
| RDS(on) | 0.73 Ω (typ. @ TJ = 25 °C) | Ω |
| Operating Frequency | Up to 100 kHz | kHz |
| Thermal Shutdown Temperature | 165 | °C |
| Package Type | VFQFPN32 5 mm x 5 mm |
Key Features
- Non-dissipative overcurrent protection on high-side power MOSFETs
- 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 free wheeling diodes
Applications
The L6228QTR is primarily used for driving bipolar stepper motors in various industrial and automotive applications. It is suitable for systems requiring precise motor control, high reliability, and robust protection features.
Q & A
- What is the operating supply voltage range of the L6228QTR?
The operating supply voltage range is from 8 to 52 V.
- What is the maximum output peak current of the L6228QTR?
The maximum output peak current is 2.8 A (1.4 A RMS).
- What is the typical RDS(on) value of the L6228QTR at 25 °C?
The typical RDS(on) value is 0.73 Ω.
- What is the maximum operating frequency of the L6228QTR?
The maximum operating frequency is up to 100 kHz.
- What type of protection does the L6228QTR have against overcurrent?
The L6228QTR features non-dissipative overcurrent protection.
- How does the L6228QTR protect against thermal issues?
The device includes thermal shutdown protection.
- What package type is the L6228QTR available in?
The L6228QTR is available in a VFQFPN32 5 mm x 5 mm package.
- Can the L6228QTR be used for both full-step and half-step stepper motor drive?
- What is the purpose of the CONTROL input pin on the L6228QTR?
The CONTROL input pin is used to select the decay mode (fast or slow) during the off-time.
- Does the L6228QTR have integrated free wheeling diodes?
