SmartJitter^TM Multi-Mode Flyback Controller

The RT7739LN is an enhanced high-efficiency multi-mode PWM flyback controller, incorporating Richtek's proprietary SmartJitter^TM technology. The innovative SmartJitter^TM technology can reduce EMI emissions of a switch-mode power supply in green mode as well as eliminate output ripple due to frequency jittering. The RT7739LN is a current-mode PWM controller for flyback converters. It integrates comprehensive and programmable protection features, which include propagation delay compensation, output over-voltage protection (OVP), external over-temperature protection (OTP), and bulk-capacitor brown-in/brown-out protection. With the above features, the RT7739LN enables a cost-effective and compact design for a wide range of AC-DC conversion applications. It is available in a SOT-23-6 package.