MONOLITHIC QUAD H BRIDGE DRIVER CIRCUIT

The µPD16879 is a monolithic quad H bridge driver IC that employs a CMOS control circuit and a MOSFET output circuit. Because it uses MOSFETs in its output stage, this driver IC consumes less power than conventional driver ICs that use bipolar transistors.
Because the µPD16879 controls a motor by inputting serial data, its package has been shrunk and the number of pins reduced. As a result, the performance of the application set can be improved and the size of the set has been reduced.
This IC employs a current-controlled 64-step micro step driving method that drives stepper motor with low vibration.
The µPD16879 is a housed in a 38-pin shrink SOP to contribute to the miniaturization of application set.
This IC can simultaneously drive two stepper motors and is ideal for the mechanisms of camcorders.

FEATURES
• Four H bridge circuits employing power MOS FETs
• Current-controlled 64-step micro step driving
• Motor control by serial data (8 bits × 13 bytes)
    PWM-frequency, output current and number of output pulse can be setting by serial data.
• 3-V power supply.
    Minimum operating voltage: 2.7 V
• Low consumption current.
    VDD pin current (operating mode) : 3 mA (MAX.)
• Power save circuit bult in.
    VDD pin current (power save mode) : 100 µA (MAX.) fCLK: OFF state
    VDD pin current (power save mode) : 300 µA (MAX.) fCLK: 4.5 MHz input
• 38-pin shrink SOP (7.62 mm (300))