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BUY SLA7052M https://www.utsource.net/itm/p/977077.html
UNIPOLAR STEPPER-MOTOR TRANSLATOR/PWM DRIVER

Below is the parameter table and instructions for the SLA7052M, a stepper motor driver IC.

SLA7052M Parameter Table

Parameter	Symbol	Min	Typ	Max	Unit
Supply Voltage	VCC	4.5	-	30	V
Logic Input Voltage	VIL	0.8	-	1.5	V (VCC = 5V)
Logic Input Voltage	VIH	2.0	-	VCC	V (VCC = 5V)
Output Current per Phase	IOUT	-	0.6	1.0	A
Maximum Power Dissipation	PD	-	-	1.5	W
Operating Temperature Range	TOPR	-40	-	85	°C
Storage Temperature Range	TSTG	-55	-	150	°C

Instructions for SLA7052M

1. Pin Configuration

• 1. VCC: Power supply voltage.
• 2. GND: Ground.
• 3. STEP: Step input signal.
• 4. DIR: Direction control input.
• 5. ENABLE: Enable input (active low).
• 6. SLP: Sleep mode control (active low).
• 7. RST: Reset input (active low).
• 8. OUT1A: Phase A output 1.
• 9. OUT1B: Phase B output 1.
• 10. OUT2A: Phase A output 2.
• 11. OUT2B: Phase B output 2.
• 12. VREF: Reference voltage for current control.
• 13. NC: No connection.
• 14. NC: No connection.
• 15. NC: No connection.
• 16. NC: No connection.

2. Basic Operation

• Supply Voltage (VCC): Connect to a power supply within the range of 4.5V to 30V.
• Ground (GND): Connect to the ground of the power supply.
• Step Input (STEP): Apply a pulse signal to this pin to step the motor. The frequency of the pulses determines the speed of the motor.
• Direction Control (DIR): Set high (1) for one direction and low (0) for the opposite direction.
• Enable (ENABLE): Set low (0) to enable the driver; set high (1) to disable the driver.
• Sleep Mode (SLP): Set low (0) to enter sleep mode, reducing power consumption; set high (1) for normal operation.
• Reset (RST): Set low (0) to reset the driver; set high (1) for normal operation.
• Output Pins (OUT1A, OUT1B, OUT2A, OUT2B): These pins connect to the motor coils.
• Reference Voltage (VREF): Connect a reference voltage to this pin to control the output current. The output current is proportional to the reference voltage.

3. Current Control

• The output current can be adjusted by setting the reference voltage (VREF). The relationship between VREF and the output current (IOUT) is given by: [ IOUT = frac{2.5} times 1.0A ]
• For example, if VREF is set to 1.25V, the output current will be 0.5A.

4. Protection Features

• Thermal Shutdown: The driver automatically shuts down if the temperature exceeds the maximum operating temperature to prevent damage.
• Overcurrent Protection: The driver limits the current to protect against overcurrent conditions.

5. Application Notes

• Ensure that the power supply is stable and within the specified range.
• Use appropriate decoupling capacitors (e.g., 100nF and 10uF) close to the VCC and GND pins to filter out noise.
• When using the driver in a high-frequency application, consider the inductance of the motor coils and the PCB layout to minimize parasitic effects.

6. Example Circuit

• Connect the motor phases to the output pins (OUT1A, OUT1B, OUT2A, OUT2B).
• Connect the step and direction signals from your microcontroller to the STEP and DIR pins.
• Set the ENABLE pin low to enable the driver.
• Set the SLP and RST pins high for normal operation.
• Adjust the VREF pin to set the desired current.

This should provide a comprehensive overview of the SLA7052M and its usage.

(For reference only)