MC7731N6 Datasheet, PDF (1/10 Pages) Cystech Electonics Corp. – Current Mode PWM Controller

CYStech Electronics Corp.
Current Mode PWM Controller
Spec. No. : C494N6
Issued Date : 2012.04.02
Revised Date :
Page No. : 1/10
MC7731N6
Description
MC7731N6 is highly integrated current mode PWM control IC optimized for high performance low
standby power offline fly back converter applications. 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 18V to protect the power MOS.
MC7731N6 offers many protection functions with auto self-recovery features, including cycle-by-cycle
current limiting, over-load protection (OLP) and under voltage lockout(UVLO).
Excellent EMI performance is achieved with frequency jitter technique together with soft switching
control at the totem pole gate driver.
Features
●Frequency jitter function to improve EMI performance of power supply
●No-audible-noise green mode Control
● External Programmable PWM Switching Frequency
● Internal Slope Compensation
● Low VDD Startup Current and Low Operating Current
● Leading Edge Blanking
● UVLO
● Gate Max Output Voltage Clamp at 18V
● Overload Protection (OLP).
● 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
MC7731N6
CYStek Product Specification