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Maximizing IC Performance Ultra-Low Standby Power Dissipation, Non-Isolated, Buck, Constant Voltage Driver Tel: 86-10-62662828 Copyright © 2020 Maxic Technology Corporation Page 1
DESCRIPTION
MT8805S0 is an ultra -low standby power dissipation, non -isolated, BUCK, constant voltage driver, which is suitable for non -isolated power applications with the input range of 85Vac~264Vac. MT8805S0 incorporates high-voltage power switcher and i ntegrator, excellent constant voltage can be achieved without external compensation capacitor, saving system cost and the BOM size greatly. MT8805S0 is designed with VCC sample and feedback optimization, which can accelerate the dynamic response greatly. Due to the multi-mode control technique, PWM and PFM can be toggled seamlessly. In addition, the chip gets power from VCC pin and internal JFET, the system power dissipation is further reduced. MT8805S0 provides various protection features to enhance the sy stem reliability , such as cycle-by-cycle current limiting (OCP), O ver temperature protection (OTP), over load protection (OLP), short circuit protection (S CP), etc.
FEATURES
Ultra-low standby power dissipation: <30mW@120Vac&230Vac Integrated with high-voltage power MOSFET Selectable output voltage: 3.3V or 5V Integrates high voltage startup and power supply circuit Excellent dynamic response Designed with amplitude reduction modulation technology to reduce audio noise Frequency jittering to reduce EMI Output voltage accuracy: ± 5% Soft start-up Various protection features Cycle-by-cycle current limiting (OCP) Over Temperature protection (OTP) Over load protection (OLP) Short circuit protection (SCP) Available in SOP8 Package
APPLICATIONS
Auxiliary power Other applications Typical Application Circuit MT8805S0 SEL DRAIN GNDCS VCC Vin_ac FR1 Vo+ Vo- CE1 Rcs CE2