26184.12C* Data Sheet 5804BiMOS II UNIPOLARSTEPPER-MOTOR TRANSLATOR/DRIVER 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 stepper- OUTPUT 1 V B DD 16 SUPPLY motor with continuous output current ratings to 1.25 A per phase (1.5 A OUTPUT startup) and 35 V. KBD 2 OE 15 ENABLE The CMOS logic section provides the sequencing logic, DIRECTION OUTPUT D 3 14 DIRECTION and OUTPUT ENABLE control, and a power-on reset function. Three GROUND 4 13 GROUND stepper-motor drive formats, wave-drive (one-phase), two-phase, and half- LOGIC step are externally selectable. The inputs are compatible with standard GROUND 5 12 GROUND CMOS, PMOS, and NMOS circuits. TTL or LSTTL may require the use of appropriate pull-up resistors to ensure a proper input-logic high. OUTPUT 6 11 STEP INPUT C The wave-drive format consists of energizing one motor phase at a time K 7 10 HALF-STEP AC in an A-B-C-D (or D-C-B-A) sequence. This excitation mode consumes the OUTPUTA 8 9 ONE-PHASE 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 Dwg. W-194 improved torque-speed product, greater detent torque, and is less susceptible Note that the UCN5804B (dual in-line package) to motor resonance. Half-step excitation alternates between the one-phase and UCN5804LB (small outline IC package) are and two-phase modes (A-AB-B-BC-C-CD-D-DA), providing an eight-step electrically identical and share a common sequence. terminal number assignment. 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 exces- sive. 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 ABSOLUTE MAXIMUM RATINGS package with a copper lead frame and heat-sinkable tabs for improved power dissipation capabilities; the UCN5804LB is supplied in a 16-lead plastic Output Voltage, V SOIC batwing package with a copper lead frame and heat-sinkable tabs. CE ... 50 V Output Sustaining Voltage, FEATURES VCE (sus) .. 35 V ■ 1.5 A Maximum Output Current Output Sink Current, IOUT .. 1.5 A ■ 35 V Output Sustaining Voltage Logic Supply Voltage, VDD .. 7.0 V ■ Wave-Drive, Two-Phase, and Half-Step Drive Formats Input Voltage, VIN .. 7.0 V ■ Internal Clamp Diodes Package Power Dissipation, ■ Output Enable and Direction Control PD ... See Graph ■ Power-On Reset Operating Temperature Range, ■ Internal Thermal Shutdown Circuitry TA .. -20 ° C to +85 ° C Storage Temperature Range, TS .. -55 ° C to +150 ° C Always order by complete part number, e.g., UCN5804B .
