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))