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UCN5804B

Allegro
Part Number UCN5804B
Manufacturer Allegro
Description BiMOS II UNIPOLAR STEPPER-MOTOR TRANSLATOR/DRIVER
Published Aug 15, 2006
Detailed Description 5804 BiMOS II UNIPOLAR STEPPER-MOTOR TRANSLATOR/DRIVER OUTPUT B 1 2 3 4 LOGIC GROUND OUTPUT 5 6 7 8 12 11 10 9 GROUND S...
Datasheet PDF File UCN5804B PDF File

UCN5804B
UCN5804B

Overview
5804 BiMOS II UNIPOLAR STEPPER-MOTOR TRANSLATOR/DRIVER OUTPUT B 1 2 3 4 LOGIC GROUND OUTPUT 5 6 7 8 12 11 10 9 GROUND STEP INPUT HALF-STEP ONE-PHASE VDD OE 16 15 14 13 SUPPLY OUTPUT ENABLE DIRECTION GROUND KBD OUTPUT D GROUND Combining low-power CMOS logic with high-current and high-voltage bipolar outputs, the UCN5804B and UCN5804LB BiMOS II translator/ drivers provide complete control and drive for a four-phase unipolar steppermotor with continuous output current ratings to 1.
25 A per phase (1.
5 A startup) and 35 V.
The CMOS logic section provides the sequencing logic, DIRECTION and OUTPUT ENABLE control, and a power-on reset function.
Three stepper-motor drive formats, wave-drive (one-phase), two-phase, and halfstep are externally selectable.
The inputs are compatible with standard CMOS, PMOS, and NMOS circuits.
TTL or LSTTL may require the use of appropriate pull-up resistors to ensure a proper input-logic high.
The wave-drive format consists of energizing one motor phase at a time in an A-B-C-D (or D-C-B-A) sequence.
This excitation mode consumes the least power and assures positional accuracy regardless of any winding inbalance in the motor.
Two-phase drive energizes two adjacent phases in each detent position (AB-BC-CD-DA).
This sequence mode offers an improved torque-speed product, greater detent torque, and is less susceptible to motor resonance.
Half-step excitation alternates between the one-phase and two-phase modes (A-AB-B-BC-C-CD-D-DA), providing an eight-step sequence.
The bipolar outputs are capable of sinking up to 1.
5 A and withstanding 50 V in the off state (sustaining voltages up to 35 V).
Ground-clamp and flyback diodes provide protection against inductive transients.
Thermal protection circuitry disables the outputs when the chip temperature is excessive.
Both devices are rated for operation over the temperature range of -20°C to +85°C.
The UCN5804B is supplied in a 16-pin dual in-line plastic batwing package with a copper lead frame and ...


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