MP174

700V Non-Isolated Off-Line Regulator,

Up to 400mA Output Current

MP174 Rev. 1.01

www.MonolithicPower.com

1

8/18/2016

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© 2016 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

MP174 is a primary-side regulator that provides

accurate constant voltage (CV) regulation

without opto-coupler. It supports Buck, Buck-

Boost, Boost and Flyback topologies. It has an

integrated 700V MOSFET to simplify the

structure and reduce costs. These features

make it an ideal regulator for off-line low power

applications, such as home appliances and

standby power.

MP174 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.

MP174 features various protections, including

thermal shutdown (OTP), VCC under-voltage

lockout (UVLO), overload protection (OLP),

short-circuit protection (SCP), and open loop

protection.

MP174 is available in small TSOT23-5 package

and SOIC8 package.

FEATURES

 Primary-side CV control, supporting Buck,

Buck-Boost, Boost and Flyback topologies

 Integrated 700V/13.5Ω MOSFET and

current source

 <30mW no-load power consumption

 Up to 5W output power

 Maximum DCM output current less than

250mA

 Maximum CCM output current less than

400mA

 Low VCC Operating Current

 Frequency foldback

 Limited maximum frequency

 Peak-current compression

 Internally biased VCC

 OTP, UVLO, OLP, SCP, open loop

protection

APPLICATIONS



Home appliances, white goods and

consumer electronics



Industrial controls



Standby power

All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For

MPS green status, please visit MPS website under Quality Assurance. “MPS”

and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION