RT7740 Datasheet | Richtek

Description The RT7740 series is an enhanced high-efficiency multimode PWM flyback controller, incorporating Richtek’s proprietary Smart Jitter TM technology. The innovative Smart Jitter 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. Also, the RT7740 series features a multi-mode control scheme, operating from continuous-conduction mode (CCM) to discontinuous-conduction mode (DCM) with valley switching, to achieve high efficiency and optimal performance. The RT7740 is a current-mode PWM controller for flyback converters. It integrates prehensive and programmable protection features , which include propagation delay pensation, output over-voltage protection (OVP), external over-temperature protection (OTP), and bulkcapacitor brown-in/brown-out protection. With the above features , the RT7740 enables a cost-effective and pact design for a wide range of AC-DC conversion applications. It is available in a SOT-23-6 package. Features - Proprietary Smart Jitter TM Technology  Reducing EMI Emissions of SMPS  Eliminating Frequency-Jittering-Induced Output Ripple - Operating in Continuous-Conduction Mode (CCM), Discontinuous-Conduction Mode (DCM), DCM with Valley-Switching - Ultra-low Start-Up Current (< 3μA) - Accurate Over-Current Protection (OCP) - Programmable Line pensation - Programmable Output Over-Voltage Protection - Programmable External Over-Temperature Protection - Programmable Bulk-Capacitor Brown-In/Brown-Out Protection - Driver Capability : 250m A/- 400m A - High Noise Immunity Applications - Switching AC-DC Adapter - NB Adapter - TV/Monitor Standby Power - PC Peripherals Simplified Application Circuit VO+ Mains (90V to 265V) VO- DMAG VDD GATE P RT7740 CS GND (Option) Copyright ©2018 Richtek Technology Corporation. All rights reserved. DS7740-P00 July 2018 is a registered trademark of Richtek Technology Corporation. .richtek. 1 Preliminary Ordering...