LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS

The UTC UC3879A provides a CCM/valley switching mixedmode operation for better efficiency performance. The UTCUC3879A is a highly integrated current mode PWM control IC withhigh voltage start up, optimized for high performance, low standbypower consumption and cost effective offline flyback converte Built in high voltage startup Built in x-cap discharge function Proprietary frequency hopping for Improved EMI performance Cycle-by-cycle current limiting CCM/Valley Switching Operation Fixed switch frequency 60~70kHz Dynamic peak current limiting for constant output power Built-in synchronized slop;

UTC

友顺

PHASE SHIFT RESONANT CONTROLLER

文件：459.2 Kbytes 页数：15 Pages

TI

德州仪器

PHASE SHIFT RESONANT CONTROLLER

FEATURES · Programmable Output Turn On Delay; Zero Delay Available · Compatible with Voltage Mode or Current Mode Topologies · Practical Operation at Switching Frequencies to 300 kHz · 10-MHz Error Amplifier · Pin Programmable Undervoltage Lockout · Low Startup Current – 150 mA · Soft St

文件：729.06 Kbytes 页数：18 Pages

TI

德州仪器

PHASE SHIFT RESONANT CONTROLLER

FEATURES · Programmable Output Turn On Delay; Zero Delay Available · Compatible with Voltage Mode or Current Mode Topologies · Practical Operation at Switching Frequencies to 300 kHz · 10-MHz Error Amplifier · Pin Programmable Undervoltage Lockout · Low Startup Current – 150 mA · Soft St

文件：729.06 Kbytes 页数：18 Pages

TI

德州仪器