HFC0400 Fixed Frequency Flyback Controller with Ultra-low No Load Power Consumption DESCRIPTION FEATURES Fixed-frequency current-mode control with HFC0400 is a fixed-frequency current-mode built-in slope compensation controller with built-in slope compensation. It Frequency foldback down to 25kHz at light targets medium-power, off-line, flyback, switch- loads mode power supplies. At light loads, the Burst mode for low standby power controller freezes the peak current and reduces its switching frequency down to 25kHz to offer consumption excellent light-load efficiency. Frequency jitter to reduce EMI signature X-cap discharge function At very light loads, the controller enters burst Internal high-voltage current source mode to achieve very low standby power VCC under-voltage lockout with hysteresis consumption. (UVLO) HFC0400 offers frequency jittering to help Brown-out protection on HV pin dissipate energy generated by conducted noise. Overload protection with programmable delay HFC0400 also has an X-cap discharge function Thermal shutdown (auto-restart with to discharge the X-cap when the input is hysteresis) unplugged. Latch-off for external over-voltage protection HFC0400 features multiple protections that (OVP) and over-temperature protection include thermal shutdown (TSD), VCC under- (OTP) on TIMER pin voltage lockout (UVLO), overload protection Short-circuit protection (OLP), over-voltage protection (OVP), and Programmable soft start brown-out protection. APPLICATIONS HFC0400 is available in an SOIC8-7A package. AC/DC adapters for notebook computers, tablets, and smartphones Offline battery chargers LCD TV s and monitors All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. HFC0400 Rev. 1.02 www.MonolithicPower.com 1 7/10/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved. HFC0400 FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION TYPICAL APPLICATION HFC0400 Rev. 1.02 www.MonolithicPower.com 2 7/10/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved.