1FEATURES

• Single Input (PWM and TTL Compatible)

• High-Current Power FET Driver, 1-A Source

and 2-A Sink

• Auxiliary Output FET Driver, 0.5-A Source and

1-A Sink

• Time Delays Between Power and Auxiliary

Outputs Independently Programmable from 50

to 500-ns

• Time Delay or True Zero-Voltage Operation

Independently Configurable for Each Output

• Switching Frequency to 1 MHz

• Typical 50-ns Propagation Delays

• ENBL Pin Activates 220-μA Sleep Mode

• Power Output is Active-Low in Sleep Mode

• Synchronous Rectifier Driver

DESCRIPTION

These two families of high speed drivers are

designed to provide drive waveforms for

complementary switches. Complementary switch

configurations are commonly used in synchronous

rectification circuits and active clamp/reset circuits,

which provide zero voltage switching. In order to

facilitate the soft switching transitions, independently

programmable delays between the two output

waveforms are provided on these drivers. The delay

pins also have true-zero voltage-sensing capability

which allows immediate activation of the

corresponding switch when zero voltage is applied.

These devices require a PWM-type input to operate

and interface with commonly available PWM

controllers.

In the UC1714 series, the AUX output is inverted to

allow driving a p-channel MOSFET. In the UC1715

series, the two outputs are configured in a true

complementary fashion.