An app note (PDF!) from STMicroelectronics on L6234 three phase motor driver:
The L6234 is a DMOSs triple half-bridge driver with input supply voltage up 52V and output current of 5A. It can be used in a very wide range of applications.
It has been realized in Multipower BCD60II technology which allows the combination of isolated DMOS transistors with CMOS and Bipolar circuits on the same chip. It is available in Power DIP 20 (16+2+2) and in Power SO 20 packages.
All the inputs are TTL/CMOS compatible and each half bridge can be driven by its own dedicated input and enable.
The DMOS structure has an intrinsic free wheeling body diode so the use of external diodes, which are necessary in the bipolar configuration, can be avoided. The DMOS structure allows a very low quiescent current of 6.5 mA typ. at Vs=42V , irrespective of the load.