DESCRIPTION

· The UCC3580 family of PWM controllers is designed for active clamp/reset and synchronous rectifier switching converter topologies.

· It includes an auxiliary switch driver complementary to the main power switch, with programmable deadtime.

· The active clamp/reset technique allows single-ended converters to operate beyond 50% duty cycle, reducing voltage stresses and switching losses.

· The oscillator is programmed with resistors and a capacitor to set switching frequency and maximum duty cycle.

FEATURES

· Provides auxiliary switch activation complementary to the main power switch drive.

· Programmable deadtime (turn-on delay) between activation of each switch.

· Voltage mode control with feedforward operation.

· Programmable limits for transformer volt-second product and PWM duty cycle.

· High current gate driver for both main and auxiliary outputs.

· Multiple protection features with latched shutdown and soft restart.

· Low supply current (100 µA startup, 1.5 mA operation).

APPLICATIONS

· Suitable for implementing active clamp/reset and synchronous rectifier switching converter topologies.

· Ideal for high-performance, fixed-frequency pulse width modulation applications.

· Effective in reducing voltage stresses and switching losses in single-ended converters.