LC3722D Three-Phase 86/110 Digital Stepper Driver

Product Overview

LC3722D is a new generation of digital three-phase stepping drive developed based on 32-bit DSP technology. The control plug has been modified based on the old model, which is more convenient for users to use. At the same time, the drive adds a 1Mhz and 20Hz pulse input mode switch, which effectively solves the interference problem in some occasions, making the product more widely used. The drive combines more advanced algorithms, which greatly reduces the noise of motor during operation, making the motor run more smoothly and reliably.

Features

Voltage input range: AC110V～280V Maximum peak current: 7.0A Subdivision range: 400～60000ppr Pulse form: Pulse + direction (dual pulse not supported) Pulse response frequency: 0～1MHz Phase memory function: when the pulse input stops for more than 3 seconds, the driver automatically memorizes the motor phase at that time.

Product Overview Supporting Products Data Download

Product Diagram

Parameter Settings

The LC3722D driver uses a 10-bit DIP switch to set microstepping, current, single/double pulse, and automatic switch detection, detailed as follows:

Operating Current Setting

Running Current	1.2	1.5	2.0	2.3	2.5	3.0	3.2	3.6
SW1	off	off	off	off	off	off	off	off
SW2	off	off	off	off	on	on	on	on
SW3	off	off	on	on	off	off	on	on
SW4	off	on	off	on	off	on	off	on
Running Current	4.0	4.5	5.0	5.3	5.8	6.2	6.5	7.0
SW1	on	on	on	on	on	on	on	on
SW2	off	off	off	off	on	on	on	on
SW3	off	off	on	on	off	off	on	on
SW4	off	on	off	on	off	on	off	on

Microstepping Setting

Subdivision Number	400	500	600	800	1000	1200	2000	3000
SW5	on	on	on	on	on	on	on	on
SW6	on	on	on	on	off	off	off	off
SW7	on	on	off	off	on	on	off	off
SW8	on	off	on	off	on	off	on	off
Subdivision Number	4000	5000	6000	8000	10000	20000	30000	60000
SW5	off	off	off	off	off	off	off	off
SW6	on	on	on	on	off	off	off	off
SW7	on	on	off	off	on	on	off	off
SW8	on	off	on	off	on	off	on	off
SW9	ON, double pulse: PU is the forward step pulse signal, DR is the reverse step pulse signal / OFF, single pulse: PU is the step pulse signal, DR is the direction control signal
SW10	Automatic detection switch (OFF receives external pulses, ON runs the driver internally at 30 RPM)

Pin Function Description

Port Definition	Number	Symbol	Function	Definition
DB15	1	5PLS+	Positive terminal of 5V pulse control signal	Connect to 5V power supply, +5V~24V can drive, above 5V requires a current limiting resistor; +12V connect 1.2KΩ resistor, +24V connect 3KΩ resistor
	2	PLS-	SW9=OFF, step pulse signal	Used to control motor positioning, active low, motor steps when pulse goes from high to low, input resistance 220Ω; low level 0~0.5V, pulse width >2.5μs
	2	PLS-	SW9=ON, forward step pulse signal
	3	5DIR+	Positive terminal of 5V direction control signal	Connect to 5V power supply, +5V~24V can drive, above 5V requires a current limiting resistor; +12V connect 1.2KΩ resistor, +24V connect 3KΩ resistor
	4	5DIR-	SW9=OFF, direction control signal	Used to control motor rotation direction, active low, input resistance 220Ω; requirements: low level 0~0.5V, pulse width >2.5μs
	4	5DIR-	SW9=ON, reverse step pulse signal
	7	5ENA+	Positive terminal of 5V enable control signal	Connect to 5V power supply, +5V~24V can drive, above 5V requires a current limiting resistor; +12V connect 1.2KΩ resistor, +24V connect 3KΩ resistor
	8	ENA-	Common negative terminal of enable control signal	When connected (low level), used to disable motor enable, motor shaft is free
	9	ALM+	Positive terminal of fault output signal	The alarm output of LC3722A is a normally closed switch signal; can connect 24V(5V), 0V according to host requirements to select high or low level output signal
	10	AML-	Negative terminal of fault output signal
	11	RDY+	Positive terminal of driver ready output signal	Signal is valid (low level) when driver is enabled and ready to receive controller signals; can connect 24V(5V), 0V according to host requirements to select high or low level output signal
	12	RDY-	Negative terminal of driver ready output signal
	13	24PLS+	Positive terminal of 24V pulse control signal	Pulse control signal at 24V can directly use this pin, 24V can drive (no series resistor needed)
	14	24DIR+	Positive terminal of 24V direction control signal	Direction control signal at 24V can directly use this pin, 24V can drive (no series resistor needed)
	15	24ENA+	Positive terminal of 24V enable control signal	Enable control signal at 24V can directly use this pin, 24V can drive (no series resistor needed)
Motor	1, 2, 3	U, V, W	Motor power lines	U, V, W correspond to motor winding groups; swapping any two of the three winding wires can change motor direction
Ground	4	PE	Ground wire	Earth, internally connected to starter casing
Power Supply	5	L	Single-phase AC power supply	AC 180V~230V
Power Supply	6	N	Single-phase AC power supply	AC 180V~230V

Main Application Areas

Suitable for various motion control automation equipment and instruments, such as: electronic processing and inspection, semiconductor packaging, laser cutting and welding, laser typesetting, packaging machinery, engraving machines, marking machines, cutting machines, garment plotters, medium CNC machine tools, automated assembly equipment, and other high-resolution medium and large CNC equipment.