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