Low -power CMOS logic and high -current high -voltage bipolar output, UCN5804B and UCN5804LB BIMOS II converter/drive The output current rated is 1.25 A (1.5 A startup) and 35V per phase.

CMOS logic parts provide sorting logic, direction and output enable control, and power -on reset function.

Three -step motor driver format, wave drive (single phase), two -phase and half -step entrance can be selected from the outside. Input and standard are compatible with CMOS, PMOS and NMOS circuits. TTL or LSTTL may need to use proper pull -up resistance to ensure the correct high input logic.

The waveform drive format includes a motor to power in a motor in the A-B-C-D (or D-C-B-A) sequence. This incentive mode consume the minimum power to ensure position accuracy and consider any winding motor imbalance. The two-phase driver is the position (AB-BC-CD-DA). This sequence mode provides improved torque speed products, greater braking torque, and is not vulnerable to affecting movement resonance. The semi-stereotype is alternating between the single phase and the two-phase mode (A-Ab-B-BC-CD-CD-DA DA), which provides eight steps.

The bipolar output can be reduced to 1.5 A, and it can withstand 50 V (continuous voltage as high as 35 V) in a closed state. The ground clip and the anti -gratitude diode provide inductive transient transformation protection. When the chip temperature is too high, the protection circuit will disable the output.

The rated operating temperature of the two devices exceeds -20 ° C to+85 ° C. UCN5804B uses a 16 -pin dual -column direct -inserted plastic rod with copper -line framework and hot sinking packaging to improve the power cooling capacity; UCN5804LB uses 16 lead plastic with copper -leading SOIC bat wing components

Feature

1.5 A maximum output current

35V output maintenance voltage

waveform drive, two -phase and a half step drive format

Internal clamping diodes

Output opening and direction control

Powering and reset

Internal heat shutdown circuit

Typical input circuit

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Typical output drive

The allowable packaging power consumption (tile)

] Timing conditions

Application information

Internal power -power reset (POR) circuit resetting output (and output drive grid in the two phasesFormation) The opening state of the initial application of the logic power supply voltage. After resetting, the circuit is stepped by step according to the form.

The output will enter a sequence steps to transition the pulse at the height and low transition position. The input of half -step logic electric flat single phase will determine the driving format (one stage, two stages, or half steps). This direction determines the rotation order of the output. Note that the input must be in the direction of low -state single -phase, half -step or preventing errors when changing this step.

When the output, all outputs are disabled (closed) and enabled in a logical high. If the function is not necessary, the output is limited to the low position.

In this case, all outputs depend on the state of step logic.

The mutually coupling motor winding between the single -pole stepping step motor can force the UCN5804B underground. This situation will cause the knot current and source current at the positive bias output terminal. For many L/R applications, this substrate current is enough to adversely affect the logical circuit and cause faltering. The external tandem diode (recommended to increase the efficiency of Schottky at low voltage) will prevent the substrate current from the output. Alternatively, the external grounding diode will provide ground when the output is pulled below the ground. The internal thermal protection circuit disables the output of all outputs of about 165 ° C when it reaches. When the output is enabled, it is carried out again when the joint is cooled to about 145 ° C.

Typical application L/R stepping motor driver

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UCN5804B Dimensions: Inch (control size)

The size unit is millimeter (for reference only)

] Note: 1. Within the scope of the restrictions, the supplier selects accurate body and lead configuration. 2. The spacing tolerance of the lead is not cumulative. 3. The thickness of the lead is measured below the seat or the seat surface. 4. Net -shaped lead framework. Wire 4, 5, 12 and 13Internal is one. 5.Provided with the standard stick/tube of 25 devices. UCN5804 pounds (add TR " to the part number of the tape and rolls) Size: inches (for reference only) drawing.MA-008-17A inch unit is millimeter (control size) Note: 1.Within the scope of the restrictions