MP4078 Primary-Side Control, CV Output, Single-Stage Offline Controller with Active PFC DESCRIPTION FEATURES The MP4078 is an single-stage offline controller Primary-Side Control with Simple Design with active power factor correction (PFC) for and Minimal External Components constant voltage output applications. The device Ultra-Low No-Load Power Consumption, implements primary-side regulation (PSR) Typically below 50mW with 230V AC control without requiring a secondary feedback Good Performance on PF and THD circuit or optocoupler for flyback applications. It Fast Transient Response is also available for non-isolated topologies (e.g. Fast Start-Up buck-boost). Novel Control Scheme with Continuous Peak Current Limitation The device achieves ultra-low standby power Primary-Side Over-Current Protection consumption. Its pulse frequency modulation (OCP) (PFM) implements a minimum operating frequency under no-load conditions. The Output Over-Voltage Protection (OVP) MP4078 works in discontinuous conduction Output Short-Circuit Protection (SCP) mode (DCM) with valley switching for improved Brownout Protection efficiency performance. Thermal Shutdown Available in an SOIC-8 Package The MP4078 operates in constant-on-time (COT) mode to achieve a high power factor across the APPLICATIONS universal input. It adopts a cascode MOSFET Smart LED Lighting technique to achieve fast start-up with few Front-End Pre-Regulators external components. The MP4078 integrates multiple protection All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality features that greatly enhance system reliability Assurance. MPS, the MPS logo, and Simple, Easy Solutions are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. and safety, including output over-voltage protection (OVP), output short-circuit protection (SCP), primary-side over-current protection (OCP), and over-temperature protection (OTP). The MP4078 is available in an SOIC-8 package. TYPICAL APPLICATION CIRCUIT R MULT UP GATE D MULT S VCC COMP R SENSE R ZCD1 GND ZCD R ZCD2 Figure 1: Isolated Flyback Application MP4078 Rev. 1.0 www.MonolithicPower.com 1 7/21/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved. MP4078 PSR OFFLINE CONTROLLER WITH PFC ORDERING INFORMATION Part Number* Package Top Marking MSL Rating MP4078GS SOIC-8 See Below 2 * For Tape & Reel, add suffix Z (e.g. MP4078GSZ). TOP MARKING MP4078: Part number LLLLLLLL: Lot number MPS: MPS prefix Y: Year code WW: Week code PACKAGE REFERENCE TOP VIEW GATE D 1 8 S MULT 2 7 3 6 COMP VCC GND 5 ZCD 4 SOIC-8 MP4078 Rev. 1.0 www.MonolithicPower.com 2 7/21/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved.