UCC3580D-3

Product Summary

The UCC3580D-3 is a PWM controller. The UCC3580D-3 is designed to implement a variety of active clamp/reset and synchronous rectifier switching converter topologies. The active clamp/reset technique allows operation of single ended converters beyond 50% duty cycle while reducing voltage stresses on the switches, and allows a greater flux swing for the power transformer. This approach also allows a reduction in switching losses by recovering energy stored in parasitic elements such as leakage inductance and switch capacitance. The UCC3580D-3 oscillator is programmed with two resistors and a capacitor to set switching frequency and maximum duty cycle. A separate synchronized ramp provides a voltage feedforward pulse width modulation and a programmed maximum volt-second limit. The generated clock from the oscillator UCC3580D-3 contains both frequency and maximum duty cycle information.

Parametrics

UCC3580D-3 absolute maximum ratings: (1)VDD: 16V; (2)IVDD: 25mA; (3)LINE, RAMP: 0.3V to VDD + 1V; (4)ILINE, IRAMP: 5mA; (5)DELAY: 5.3V; (6)IDELAY: 5mA; (7)IOUT1 (tpw < 1 s and Duty Cycle < 10%): 0.6A to 1.2A; (8)IOUT2 (tpw < 1 s and Duty Cycle < 10%): 0.4A to 0.4A; (9)ICLK: 100mA to 100mA; (10)OSC1, OSC2, SS, SHTDWN, EAIN: 0.3V to REF + 0.3V; (11)IEAOUT: 5mA to 5mA; (12)IREF: 30mA; (13)PGND: 0.2V to 0.2V; (14)Storage Temperature: 65℃ to +150℃; (15)Junction Temperature: 55℃ to +150℃; (16)Lead Temperature (Soldering, 10 sec.): +300℃.

Features

UCC3580D-3 features: (1)Provides Auxiliary Switch Activation Complementary to Main Power Switch Drive; (2)Programmable deadtime (Turn-on Delay) Between Activation of Each Switch; (3)Voltage Mode Control with Feedforward Operation; (4)Programmable Limits for Both Transformer Volt- Second Product and PWM Duty Cycle; (5)High Current Gate Driver for Both Main and Auxiliary Outputs; (6)Multiple Protection Features with Latched Shutdown and Soft Restart; (7)Low Supply Current (100 μA Startup, 1.5 mA Operation).

Diagrams