Click to expand full text
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD16803
MONOLITHIC DUAL H BRIDGE DRIVER CIRCUIT
DESCRIPTION
The µPD16803 is a monolithic dual H bridge driver circuit which uses N-channel power MOS FETs in its driver stage. By employing the power MOS FETs for the output stage, this driver circuit has a substantially improved saturation voltage and power consumption as compared with conventional driver circuits that use bipolar transistors. In addition, the drive current can be adjusted by an external resistor in a power-saving mode. The µPD16803 is therefore ideal as the driver circuit of the 2-phase excitation, bipolar-driven stepping motor for the head actuator of an FDD.
FEATURES
• Low ON resistance (sum of ON resistors of top and bottom transistors) RON1 = 1.5 Ω TYP. (VM = 5.0 V) RON2 = 2.