Small, Universal Input, Non-Isolated Off-Line Regulator, Evaluation Board for SOIC-8 package type. 

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Product Description

The EV171-S-00A Evaluation Board is designed to demonstrate the capabilities of MP171. The MP171 is a primary-side constant voltage regulator providing accurate constant voltage (CV) regulation without Opto-coupler. It supports Buck, Buck-Boost, Boost and Flyback topologies.

The EV171-S-00A Evaluation Board is designed as Buck application. EV171-S-00A typically drives 5V/50mA load from 85VAC to 265VAC, at 60/50Hz.

The EV171-S-00A has an excellent efficiency and meets 2kV IEC61000-4-5 surge immunity and EN55022 conducted EMI requirements. MP171 features various protections, including thermal shutdown (TSD), VCC under-voltage lockout (UVLO), over-load protection (OLP), short- circuit protection (SCP), and open loop protection.

EV171-S-00A is the Evaluation Board for MP171 SOIC-8 package type.

Product Features

  • Primary-Side non-isolated Constant Voltage (CV) control
  • Integrated 700V MOSFET
  • Peak-Current control with peak current compression
  • Low VCC operating current
  • Limited maximum frequency
  • Frequency foldback
  • Multiple protections: SCP, OLP, open-loop protection, TSD, and VCC UVLO
  • Low cost and simple external circuit
  • Internally biased VCC


700V Non-Isolated Regulator up to 60mA Output Current

MP171 is a primary-side regulator that provides accurate constant voltage (CV) regulation without an opto-coupler. It supports buck, boost, buck-boost, and flyback topologies. It has an integrated 700 V MOSFET to simplify the structure and reduce cost. These features make it an ideal regulator for offline low-power applications, such as home appliances and standby power. MP171 is a green-mode operation regulator. Both the peak current and switching frequency decrease as the load decreases. This feature provides excellent efficiency at light load and improves the overall average efficiency. MP171 has various protection features including thermal shutdown (TSD), VCC under-voltage lockout (UVLO), overload protection (OLP), short-circuit protection (SCP), and open-loop protection. MP171 is available in a small TSOT23-5 package and SOIC-8 package.

Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.