DEAD-TIME GENERATION ON THE TMS320C24X

A Dead-Band generator protects the power semiconductors during the commutation. The dead time is programmable between 0µs and 102µs. This time range is sufficient for all kinds of power semi-conductors (MOSFET, IGBT, BIPOLAR, and THYRISTOR) in a wide range of kW (kiloWatt) or HP (Horse Powers).

TMS320C24x Dead-Band separates the transition edges of two signals: output and complemented output, by a time interval. This time interval is programmable. The Dead-Band can only be used with Full Compare Output.

Full compare has two outputs per channel, a "true" phase and a "false" phase . These exits allow the device to directly drive the upper and the lower halves of an H-bridge. To accommodate any combinations of transistor types and polarities in the H-bridge, the state of the outputs in the ACTIVE versus INACTIVE time slots are programmable. Therefore, it does not necessarily follow that, in the dual output compare channels, the true and false phase outputs are electrically complementary. Furthermore, it is also not true that when one output is ACTIVE, the other is INACTIVE.

Go to the Engineering Design Center to locate information on other TI Semiconductor devices.

(c) Copyright 1998 Texas Instruments Incorporated. All rights reserved.
Trademarks, Important Notice!