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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

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
SUPPLY OUTPUT ENABLE DIRECTION GROUND
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 heat-sinkable tabs for improved power dissipation capabilities the UCN5804LB is supplied in a 16-lead plastic SOIC batwing package with a copper lead frame and heat-sinkable tabs.
Data Sheet 26184.12C
OUTPUT A
Dwg. W-194
Note that the UCN5804B (dual in-line package) and UCN5804LB (small outline IC package) are electrically identical and share a common terminal number assignment.
ABSOLUTE MAXIMUM RATINGS
Output Voltage, VCE ................ 50 V Output Sustaining Voltage, VCE (sus) ...................... 35 V Output Sink Current, IOUT .......... 1.5 A Logic Supply Voltage, VDD .......... 7.0 V Input Voltage, VIN ................. 7.0 V Package Power Dissipation, PD ..................... See Graph Operating Temperature Range, TA ................. -20°C to +85°C Storage Temperature Range, TS ................ -55°C to +150°C
FEATURES
I I I I I I I 1.5 A Maximum Output Current 35 V Output Sustaining Voltage Wave-Drive, Two-Phase, and Half-Step Drive Formats Internal Clamp Diodes Output Enable and Direction Control Power-On Reset Internal Thermal Shutdown Circuitry
Always order by complete part number, e.g., UCN5804B .
5804 BiMOS II UNIPOLAR STEPPER-MOTOR TRANSLATOR / DRIVER
TYPICAL INPUT CIRCUIT
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
Dwg. EP-010-5
TYPICAL OUTPUT DRIVER
0 25 50 75 100 TEMPERATURE IN °C 125 150
Dwg. GP-049-2A
TRUTH TABLE
Dwg. EP-021-4
Drive Format Two-Phase One-Phase Half-Step Step-Inhibit
5804 BiMOS II UNIPOLAR STEPPER-MOTOR TRANSLATOR / DRIVER
TIMING CONDITIONS
CLOCK ONE PHASE HALF STEP OOUTPUT ENABLE OUTPUT A OUTPUT B OUTPUT C OUTPUT D TWO -PHASE HALF-STEP OUTPUT WAVE DRIVE DISABLED
Dwg. W-110A
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5804 BiMOS II UNIPOLAR STEPPER-MOTOR TRANSLATOR / DRIVER
APPLICATIONS INFORMATION
Internal power-on reset (POR) circuitry resets OUTPUTA (and OUTPUTD in the two-phase drive format) to the on state with initial application of the logic supply voltage. After reset, the circuit then steps according to the tables. The outputs will advance one sequence position on the high-to-low transition of the STEP INPUT pulse. Logic levels on the HALF-STEP and ONE-PHASE inputs will determine the drive format (one-phase, two-phase, or half-step). The DIRECTION pin determines the rotation sequence of the outputs. Note that the STEP INPUT must be in the low state when changing the state of ONE-PHASE, HALF-STEP, or DIRECTION to prevent erroneous stepping. All outputs are disabled (off) when OUTPUT ENABLE is at a logic high. If the function is not required, OUTPUT ENABLE should be tied low. In that condition, all outputs depend only on the state of the step logic. During normal commutation of a unipolar stepper motor, mutual coupling between the motor windings can force the outputs of the UCN5804B below ground. This condition will cause forward biasing of the collector-to-substrate junction and source current from the output. For many L / R applications, this substrate current is high enough to adversely affect the logic circuitry and cause misstepping. External series diodes (Schottky are recommended for increased efficiency at low-voltage operation) will prevent substrate current from being sourced through the outputs. Alternatively, external ground clamp diodes will provide a preferred current path from ground when the outputs are pulled below ground. Internal thermal protection circuitry disables all outputs when the junction temperature reaches approximately 165°C. The outputs are enabled again when the junction cools down to approximately 145°C.
WAVE-DRIVE SEQUENCE
TWO-PHASE DRIVE SEQUENCE
HALF-STEP DRIVE SEQUENCE
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
5804 BiMOS II UNIPOLAR STEPPER-MOTOR TRANSLATOR / DRIVER
TYPICAL APPLICATION L / R Stepper-Motor Drive
The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in life-support devices or systems without express written approval. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use nor for any infringement of patents or other rights of third parties which may result from its use.
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5804 BiMOS II UNIPOLAR STEPPER-MOTOR TRANSLATOR / DRIVER
UCN5804B
Dimensions in Inches (controlling dimensions)
NOTE 4
Dwg. MA-001-17A in
Dimensions in Millimeters (for reference only)
NOTE 4
Dwg. MA-001-17A mm
NOTES: 1. 2. 3. 4. 5.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
5804 BiMOS II UNIPOLAR STEPPER-MOTOR TRANSLATOR / DRIVER
UCN5804LB
(add "TR" to part number for tape and reel)
Dimensions in Inches (for reference only)
0.0926 0.1043 0.0040 MIN.
Dwg. MA-008-17A in
Dimensions in Millimeters (controlling dimensions)
2.65 2.35 0.10 MIN.
Dwg. MA-008-17A mm
NOTES: 1. 2. 3. 4. 5.
www.allegromicro.com
5804 BiMOS II UNIPOLAR STEPPER-MOTOR TRANSLATOR / DRIVER
MOTOR DRIVERS
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000