Overview
The L6219DSTR, produced by Allegro MicroSystems, is a dual full-bridge PWM motor driver designed to drive both windings of a bipolar stepper motor or to bidirectionally control two DC motors. This driver features internal pulse-width modulation (PWM) control of the output current up to 750 mA and can sustain motor supply voltages up to 45 V. The outputs are optimized for low output saturation voltage drop, ensuring efficient motor operation. The device includes protective features such as ground clamp and flyback diodes, internally generated delays to prevent crossover currents, and thermal protection circuitry to disable outputs if the chip temperature exceeds safe limits.
Key Specifications
| Characteristic | Symbol | Rating | Units |
|---|---|---|---|
| Motor Supply Voltage | VBB | 10 to 45 | V |
| Logic Supply Voltage | VCC | 4.75 to 5.25 | V |
| Logic Input Voltage Range | VIN | –0.3 to VCC+0.3 | V |
| Output Current, Peak | IOUT(pk) | 1.0 | A |
| Output Current, Continuous | IOUT | 750 mA | mA |
| Operating Ambient Temperature | TA | –20 to 85 | °C |
| Maximum Junction Temperature | TJ(max) | 150 | °C |
| Storage Temperature | Tstg | –55 to 150 | °C |
| Package Type | 24-SOIC (0.295", 7.50mm Width) | ||
| Mounting Type | Surface Mount |
Key Features
- Internal pulse-width modulation (PWM) control of the output current up to 750 mA.
- Capable of sustaining motor supply voltages up to 45 V.
- Low output saturation voltage drop (less than 1.8 V total source plus sink at 500 mA).
- Two logic-level inputs to select output current limits of 0, 33, 67, or 100% of the maximum level.
- PHASE input to each bridge determines load current direction.
- Ground clamp and flyback diodes for protection against inductive transients.
- Internally generated delays to prevent crossover currents when switching current direction.
- Thermal protection circuitry to disable outputs if the chip temperature exceeds safe operating limits.
- No special power-up sequencing required.
Applications
- Driving both windings of a bipolar stepper motor.
- Bidirectional control of two DC motors.
- General purpose motor control in various industrial and automotive applications.
- μP-controlled drive formats, especially for half-step operations in stepper motors.
Q & A
- What is the maximum motor supply voltage the L6219DSTR can handle?
The L6219DSTR can sustain motor supply voltages up to 45 V.
- What is the maximum output current of the L6219DSTR?
The maximum output current is 750 mA, with a peak current rating of 1.0 A.
- What type of motors can the L6219DSTR control?
The L6219DSTR can control both bipolar stepper motors and brushed DC motors.
- What is the operating ambient temperature range of the L6219DSTR?
The operating ambient temperature range is –20 to 85°C.
- Does the L6219DSTR have thermal protection?
Yes, the L6219DSTR includes thermal protection circuitry that disables the outputs if the chip temperature exceeds safe operating limits.
- How does the L6219DSTR control output current?
The output current is controlled through PWM and can be set using two logic-level inputs to select current limits of 0, 33, 67, or 100% of the maximum level.
- What type of package does the L6219DSTR come in?
The L6219DSTR is supplied in a 24-pin surface-mountable SOIC package.
- Does the L6219DSTR require special power-up sequencing?
No, special power-up sequencing is not required for the L6219DSTR.
- What are the protective features of the L6219DSTR?
The L6219DSTR includes ground clamp and flyback diodes for protection against inductive transients and internally generated delays to prevent crossover currents.
- How does the L6219DSTR manage current direction?
The current direction is determined by the PHASE input to each bridge.
