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MP155 Datasheet PDF - MPS

Part Number MP155
Description Energy Efficient Off-line Regulator
Manufacturers MPS 
Logo MPS Logo 

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MP155
Energy Efficient Off-line Regulator
The Future of Analog IC Technology
DESCRIPTION
The MP155 is a prim ary-side regulator that
provides accurate con stant voltage regulation
without the opto-coupler, and supports Buck,
Buck-boost, Boost and Flyback top ologies. An
integrated 500V MOSFET simplifies th
e
structure a nd reduces cost s. Th ese feature s
make it a competitive candidate for off-line low-
power applications, su ch as home appliances
and standby power.
The MP1 55 is a green-mode-operatio n
regulator. Both the peak curre nt and th e
switching f requency decrease as the load
decreases. As a re sult, it off ers excellent
efficiency performance at ligh t load, thu s
improving the overall average efficiency.
The MP155 features various prote ctions su ch
as thermal shutdown (TSD), VCC under-voltage
lockout (UVLO), overload protection (OLP),
short-circuit protection (SCP), and open loop
protection.
The MP155 is available in the TSOT23-5 and
SOIC8 packages.
FEATURES
Primary-side constant voltage (CV) control,
supporting Buck, Buck-boost, Boost and
Flyback topologies
Integrated 500V/20MOSFET
< 100mW No-load power consumption
Up to 3W output power
Maximum DCM output current of 130mA
Maximum CCM output current of 220mA
Low VCC operating current
Frequency foldback
Maximum frequency limit
Peak current compression
Internal high-voltage current source
Internal 350ns leading-edge blanking
Thermal shutdown (auto restart)
VCC under-voltage lockout with hysteresis
(UVLO)
Timer-based overload protection.
Short circuit protection
Open loop protection
APPLICATIONS
Home Appliances, white goods and
consumer electronics
Industrial Controls
Standby Power
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit M PS website u nder Q uality Assurance. “MPS” and “ The
Future of An alog IC Technology” a re Re gistered T rademarks of Mo nolithic
Power Systems, Inc.
TYPICAL APPLICATION
D3 L1
C1 C2
DRAIN
VCC
FB
SOURCE SOURCE
MP155
D2
C3 R1
R2
C4
L2
Output
D1 C5
MP155 Rev. 1.12
10/28/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
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MP155 equivalent
MP155 – ENERGY EFFICIENT OFF-LINE REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 265VAC, VOUT = 12V, IOUT = 200mA, L = 2.2mH, COUT = 100μF, TA = +25°C, unless otherwise
noted.
Start up
Normal operation
SCP
VDS
100V/div.
IL
100mA/div.
Zoom In
VDS
100V/div.
IL
100mA/div.
Open Loop Protection
Zoom In
VDS
100V/div.
IL
100mA/div.
Zoom In
VDS
100V/div.
IL
250mA/div.
Zoom In
MP155 Rev. 1.12
10/28/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5


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