Update: 28 September, 2023
UCC3581 is a voltage mode pulse width modulator designed to control low power isolated DC-DC converters, primarily used for single switch forward and flyback converters. It features BiCMOS circuitry for low startup and operating current, while being able to drive power MOSFETs at frequencies up to 100kHz. The UCC3581 oscillator allows programming of both the frequency and the maximum duty cycle with two resistors and a capacitor. It includes programmable soft start circuitry, overcurrent detection, a 7.5V linear preregulator for controlling chip VDD during startup, and an on-board 4.0V logic supply. The UCC3581 provides functions to maximize light load efficiency that are not normally found in PWM controllers.
File format: PDF
Size: -
MD5 Checksum: 12843355C110BAE66976F53CAE886FC6
Publication date: 01 August, 2012
Downloads: -
PDF Link: UNITRODE UCC1581 UCC2581 UCC3581 handbook PDF