The MP4078 is an single-stage offline controller with active power factor correction (PFC) for constant voltage output applications. The device implements primary-side regulation (PSR) control without requiring a secondary feedback circuit or optocoupler for flyback applications. It is also available for non-isolated topologies (e.g. buck-boost).
The device achieves ultra-low standby power consumption. Its pulse frequency modulation (PFM) implements a minimum operating frequency under no-load conditions. The MP4078 works in discontinuous conduction mode (DCM) with valley switching for improved efficiency performance.
The MP4078 operates in constant-on-time (COT) mode to achieve a high power factor across the universal input. It adopts a cascode MOSFET technique to achieve fast start-up with few external components.
The MP4078 integrates multiple protection features that greatly enhance system reliability 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.
Ultra-Low No Load Power, Typically< 50mW@230VAC
PSR with good regulation, <±3%
High PF(>0.95) and low THD (<10%)
Fast startup by cascode-MOSFET technique
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The EV4078-S-00A evaluation board is designed for smart LED lighting and front-end pre-regulator applications with the MP4078.
The MP4078 is a single-stage offline controller with active power factor correction (PFC) for constant output voltage applications. The MP4078 implements primary-side regulation (PSR) control without any secondary feedback circuit or optocoupler for flyback applications.
The EV4078-S-00A features a universal input voltage (90VAC to 265VAC) with a 50V, 600mA constant voltage output and 30W rated power.
The EV4078-S-00A has ultra-low no-load power consumption and good efficiency under full-load conditions. The EV4078-S-00A can meet IEC61000-3-2 Class C standards, and conducted emission (CE) EN55022 standards. The device features integrated protections, such as brownout functionality, over-current protection (OCP), output over-voltage protection (OVP), output short circuit protection, and over-temperature protection (OTP).