CYStech Electronics Corp.

Spec. No. : C595N6

Issued Date : 2012.02.23

Revised Date :

Page No. : 1/12

MC3265N6

CYStek Product Specification

Current Mode PWM Controller

MC3265N6

Description

MC3265 is a highly integrated current mode PWM control IC optimized for high performance low standby

power offline flyback converter applications.

To improve the efficiency, MC3265 works at QR (Quasi-Resonant) mode or fixed frequency(52KHz) while

the loading is high and the line voltage is high or low.

At normal loading, MC3265 works at QR mode and the frequency is limited to 95KHz.

To meet the international power conservation requirements, optimized green mode is integrated to improve

the efficiency at light or no load conditions with no audible noise.

Slope compensation is integrated to ensure the stability at high load. Lead edge blanking is integrated to

prevent the false trigger at the transition of the switch. Soft switching control at the gate drive can improve

the EMI performance of the power supply. The Gate-drive output is clamped at 16V to protect the power

MOS.

Features

●Frequency jitter function to improve EMI performance of power supply

●No-audible-noise green mode Control

● Multi operation mode: QR, fixed-frequency CCM and green mode.

● Internal Slope Compensation

● Low VDD Startup Current and Low Operating Current

● Leading Edge Blanking

● UVLO

● Gate Max Output Voltage Clamp at 16V

● Overload Protection (OLP).

● Over temperature Protection (OTP).

● Line Compensation Over Current Protection (OCP)

Applications

Offline AC/DC flyback converter for

● Battery Charger

● Power Adaptor

● Set-Top Box Power Supplies

● Open-frame SMPS

● PC 5V Standby Power

● TV Power Supplies Standby