MP157GS-Z

AC DC Converters, Offline Switchers Overview

The MP157GS-Z is a non-isolated AC/DC converter from Monolithic Power Systems, designed for offline applications with up to 6W output power. It utilizes primary-side regulation to achieve precise constant voltage control without requiring an optocoupler. The device integrates a 500V MOSFET and supports Buck, Buck-Boost, Boost, and Flyback topologies. Key electrical parameters include a switching frequency of 45 kHz, a maximum duty cycle of 40%, and a VCC supply voltage range of 4.45V to 4.6V. It operates within a temperature range of -40°C to +125°C and features low quiescent current ranging from 2.5 mA to 4.5 mA.

AC DC Converters, Offline Switchers Feature Summary

• Primary-side constant voltage regulation eliminates the need for optocouplers and secondary feedback components.
• Integrated high-voltage MOSFET simplifies circuit design and reduces overall component count.
• Adaptive frequency and peak current reduction mechanisms enhance efficiency under light load conditions.
• Comprehensive protection suite includes over-temperature shutdown, UVLO, overload, short-circuit, and open-loop protection.

AC DC Converters, Offline Switchers Applications

• Low-power household appliances
• Standby power supplies
• Industrial control systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'Z' indicates RoHS compliance when ordering. Confirm the SOIC-8 package variant matches your PCB footprint requirements. Ensure the input voltage profile aligns with the specified VCC operating range. Cross-reference the datasheet for thermal management needs given the 125°C junction temperature limit. Validate that the target application falls within the 6W power boundary.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs prioritizing cost reduction through the elimination of isolation barriers and optocouplers. It is suitable for applications where board space is limited due to its integrated switch and compact packaging. Consider the supported topologies to determine compatibility with your transformer or inductor design. Evaluate the thermal performance characteristics against your expected ambient operating conditions.

AC DC Converters, Offline Switchers Part Context

This part belongs to the MP157 series of EasyPower voltage converters, which are characterized by ultra-small size and energy efficiency. The series targets offline regulators with extended power ranges, offering a simplified solution for low-power AC/DC conversion tasks compared to traditional isolated regulator architectures.

AC DC Converters, Offline Switchers Replacement Considerations

MP157GS-P is listed as a direct substitute by the manufacturer. Verify if the non-Z suffix differs in environmental compliance or specific manufacturing lot characteristics before substitution.

AC DC Converters, Offline Switchers FAQ

Does the MP157GS-Z require an optocoupler for regulation?

No, it uses primary-side regulation to provide precise constant voltage control without an optocoupler.

What protection features are integrated into the MP157GS-Z?

It includes over-temperature shutdown (auto-restart), VCC undervoltage lockout, overload protection, short-circuit protection, and open-loop protection.