XZ3870 is highly integrated current mode PWM control IC optimized for
high performance low standby power offline flyback 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. XZ3870 offers many protection functions with auto self-recovery
feature, 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. XZ3870 is offered in SOT23-6,SOP-8 and DIP-8 packages.