Overview
The L6506D is a linear integrated circuit designed by STMicroelectronics to sense and control the current in stepping motors and similar devices. It is part of a chip set that, when used in conjunction with drivers like the L293, L298, L7150, L6114/L6115, forms a constant current drive for inductive loads. The device performs all the interface functions from control logic through the power stage, making it a comprehensive solution for motor control applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC Supply Voltage | 4.5 - 7 | V |
| ICC Quiescent Supply Current (VCC = 7V) | 25 | mA |
| Ptot Total Power Dissipation (Tamb = 70°C) | 1.0 W (DIP18), 0.8 W (SO20) | W |
| Tj Junction Temperature | -40 to 150 | °C |
| Tstg Storage Temperature | -40 to 150 | °C |
| fosc Frequency Range | 5 - 70 | kHz |
| VthL Lower Threshold Voltage | 0.33 VCC | V |
| VthH Higher Threshold Voltage | 0.66 VCC | V |
| Ri Internal Discharge Resistor | 0.7 - 1.3 kΩ | kΩ |
Key Features
- Linear integrated circuit for current sensing and control in stepping motors.
- Compatible with various power stage drivers like L293, L298, L7150, L6114/L6115.
- On-chip oscillator for pulse width modulated drive, with adjustable frequency using an RC network.
- Synchronization capability using the sync pin to avoid ground noise issues.
- TTL-compatible inputs and outputs.
- Supports full step, half step, and microstepping motor drives.
- Independent programming of each load winding for flexible current control.
Applications
- Constant current drives for stepper motors.
- Full step, half step, and microstepping motor control.
- Use in 2-phase bipolar and 4-phase unipolar motor applications.
- Implementation in various industrial and automotive systems requiring precise motor control.
Q & A
- What is the primary function of the L6506D?
The primary function of the L6506D is to sense and control the current in stepping motors and similar devices.
- Which power stage drivers is the L6506D compatible with?
The L6506D is compatible with power stage drivers such as L293, L298, L7150, L6114/L6115.
- How is the operating frequency of the L6506D adjusted?
The operating frequency is adjusted using an RC network connected to the oscillator pins.
- Can multiple L6506D devices be synchronized?
Yes, multiple devices can be synchronized using the sync pin to avoid ground noise issues.
- What are the typical applications of the L6506D?
The L6506D is typically used in constant current drives for stepper motors, including full step, half step, and microstepping motor control.
- What is the operating temperature range of the L6506D?
The operating temperature range is from -40°C to 150°C.
- What is the maximum supply voltage for the L6506D?
The maximum supply voltage is 7 V.
- How is the peak current in each winding programmed?
The peak current is programmed by selecting the value of the sense resistor and the reference voltage (Vref).
- Is the L6506D compatible with TTL logic?
Yes, the L6506D has TTL-compatible inputs and outputs.
- Can the L6506D be used in both bipolar and unipolar motor applications?
Yes, the L6506D can be used in both 2-phase bipolar and 4-phase unipolar motor applications.
