Offline Primary Side 2W Regulator

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MP150 is a primary-side regulator that provides accurate constant voltage (CV) regulation without the opto-coupler, and supports Buck, Buck-boost, Boost and Flyback topologies. It has an integrated 500V MOSFET that simplifies the structure and reduces costs. These features help to make it a competitive candidate for offline low power applications, such as home appliances and standby power.

MP150 is a green-mode operation regulator. Both the peak current and switching frequency decrease as the load decreases to provide excellent efficiency performance at light load, thus improving the overall average efficiency.

The MP150 features various protections, including thermal shutdown (TSD), VCC undervoltage lockout (UVLO), over-load protection (OLP), short-circuit protection (SCP), and open loop protection.

MP150 is available in the TSOT23-5 and SOIC8 packages.

Symmetry Electronics is an authorized Monolithic Power Systems distributor.


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Primary-side constant voltage (CV) control, supporting Buck, Buck-boost, Boost and Flyback topologies
Integrated 500V/30? MOSFET
< 150mW No-load power consumption
Up to 2W output power
Maximum DCM output current less than 120mA
Maximum CCM output current less than 200mA
Frequency foldback
Maximum frequency limitation
Peak current compression
Internal high-voltage current source


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Monolithic Power Systems Datasheet

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