Overview
The L6506/D is a linear integrated circuit designed by STMicroelectronics to sense and control the current in stepping motors and similar devices. This IC is part of a chipset that, when used in conjunction with drivers like the L293, L298, L7150, L6114/L6115, forms a constant current drive for inductive loads. It performs all the interface functions from the control logic through the power stage, making it a comprehensive solution for motor control applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 4.5 - 7 | V |
| Total Power Dissipation (Tamb = 70°C) for DIP18 | 0.8 | W |
| Total Power Dissipation (Tamb = 70°C) for SO20 | 0.8 | W |
| Junction Temperature (Tj) | -40 to 150 | °C |
| Storage Temperature (Tstg) | -40 to 150 | °C |
| Thermal Resistance Junction-ambient for DIP18 | 80 | °C/W |
| Thermal Resistance Junction-ambient for SO20 | 100 | °C/W |
| Input High Voltage (VIH) | 2 | V |
| Input Low Voltage (VIL) | 0.8 | V |
| Output High Voltage (VOH) at VCC = 4.75V, IOH = 400µA | 2 - 3.5 | V |
| Output Low Voltage (VOL) at VCC = 4.75V, IOL = 4mA | 0.25 - 0.4 | V |
| Oscillator Frequency Range | 5 - 70 | KHz |
| Lower Threshold Voltage (VthL) | 0.33 VCC | V |
| Higher Threshold Voltage (VthH) | 0.66 VCC | V |
Key Features
- Linear integrated circuit designed to sense and control current in stepping motors and similar devices.
- Compatible with various power stage drivers such as L293, L298, L7150, L6114/L6115.
- Constant current drive capability for inductive loads.
- On-chip oscillator for pulse width modulation (PWM) drive.
- Synchronization capability using the sync pin to avoid ground noise problems.
- Independent programming of each load winding for microstepping implementation.
- TTL-compatible inputs and outputs.
Applications
The L6506 is widely used in applications requiring precise current control in stepping motors, including:
- Bipolar and unipolar stepper motor drives.
- Full step, half step, and microstepping motor control.
- Constant current drives for inductive loads.
- Industrial automation and robotics.
- Printers and other precision machinery.
Q & A
- What is the primary function of the L6506 IC?
The primary function of the L6506 IC is to sense and control the current in stepping motors and similar devices. - Which power stage drivers is the L6506 compatible with?
The L6506 is compatible with power stage drivers such as L293, L298, L7150, L6114/L6115. - How does the L6506 synchronize multiple devices?
The L6506 synchronizes multiple devices using the sync pin, where the oscillator in the master chip sets the operating frequency for all chips. - What is the operating temperature range of the L6506?
The operating temperature range of the L6506 is -40°C to 150°C. - Can the L6506 be used for microstepping?
Yes, the L6506 can be used to implement microstepping of either bipolar or unipolar motors. - What is the typical oscillator frequency range of the L6506?
The typical oscillator frequency range of the L6506 is 5 to 70 KHz. - Is the L6506 RoHS compliant?
Yes, the L6506 is RoHS compliant according to EU RoHS regulations. - What are the common applications of the L6506?
The L6506 is commonly used in bipolar and unipolar stepper motor drives, full step, half step, and microstepping motor control, and in industrial automation and robotics. - What is the maximum junction temperature of the L6506?
The maximum junction temperature of the L6506 is 150°C. - How does the L6506 control the peak current in the load windings?
The L6506 controls the peak current in the load windings by using a sense resistor and a reference voltage; when the current reaches the programmed peak value, the comparator resets the flip-flop, interrupting the drive current.
