DESCRIPTION
The µPD168111A is a monolithic 2-channel H bridge driver that consists of a CMOS controller and a MOS output stage. It can reduce the current consumption and the voltage loss at the output stage compared with a conventional driver using bipolar transistors, thanks to employment of a MOS process. This product employs a P-channel MOSFET on the high side of the output stage, eliminating a charge pump. As a result, the circuit current consumption can be substantially reduced during operation.
This product is ideal for driving the motor of a digital still camera as it can switch over between two-phase excitation driving and microstep driving, using a stepper motor

FEATURES
O Two H bridge circuits employing power MOSFET
O Current feedback 64-step microstep driving and two-phase excitation driving selectable
O Motor control by serial data (6 words of 16-bit configuration)
    Data is input with the LSB first.
    Pulse cycle, number of pulses, and output current value can be set.
O Input logic frequency: 6 MHz MAX.
O 3 V power supply
    Minimum operating power supply voltage VDD = 2.7 V
O Undervoltage lockout circuit
    Shuts down internal circuitry at VDD = 1.7 V TYP.
O Constrained output leak current
    Built-in the shut off circuit of VM pin output leak current at VDD = 0 V.
O 24-pin TSSOP