MP173

MP173

NOT RECOMMENDED FOR NEW DESIGNS

700V Non-Isolated Regulator up to 280mA Output Current

ALTERNATIVE PART

NRFND Datasheet

MP173 continues to be in production for existing customers. Please consider this alternative for new designs:

MP173A

700V, Non-Isolated, Offline Regulator, Up to 280mA Output Current with Improved EMI Performance

Features & Benefits

Primary-Side CV Control
Supporting Buck, Buck-Boost, Boost, and Flyback Topologies
Integrated 700V MOSFET and Current Source
Under 30mW No-Load Power Consumption
Up to 4W Output Power
Maximum DCM Output Current Below 180mA
Maximum CCM Output Current Below 280mA
Low VCC Operating Current
Frequency Foldback
Limited Maximum Frequency
Peak Current Compression
Internally Biased VCC
TSD, UVLO, OLP, SCP, and Open-Loop Detection
Available in TSOT23-5 and SOIC-8 Packages

… and many more!

Parameters Description

Pout (max) (W) (Recommended)
4
Vac (min) (V)
20
Vac (max) (V)
305
Type
Buck Regulator
fsw (max) (kHz)
83
Control Method
On-Off
Iout (DCM) (max) (mA)
180
Iout (CCM) (max) (mA)
300
No-Load Pout (max) (mW)
30
Isw Limit (mA)
400
Vfb (V)
2.5
Vbr (V)
700
Rds(on) (Ω)
20
Iregulator (mA)
4.1
Ileak (µA)
10
Grade
Catalog
Package (mm)
SOIC-8, TSOT23-5
Power Range Defined
No
Vin (min) (V)
28
Vin (max) (V)
431.3
Active PFC
No
Isolated
No
Isolated LLC
No
Isolated Flyback
No
Internal MOSFET
Yes
Non-Isolated
Yes
Secondary Synchronous Rectification
No
Low Side Rectification
No
Vin (max) (V) AC
305
Vin (min) (V) AC
20
High Side Rectification
No

MP173 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. MP173 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. MP173 has various protection features including thermal shutdown (TSD), VCC under-voltage lockout (UVLO), overload protection (OLP), short-circuit protection (SCP), and open-loop protection. MP173 is available in a small TSOT23-5 package and SOIC-8 package.

Features & Benefits

Primary-Side CV Control, Supporting Buck, Boost, Buck-Boost, and Flyback Topologies
Integrated 700 V MOSFET and Current Source
< 30 mW No-Load Power Consumption
Up to 4 W Output Power
Maximum DCM Output Current Less than 180 mA
Maximum CCM Output Current Less than 280 mA
Low VCC Operating Current
Frequency Foldback
Limited Maximum Frequency
Peak-Current Compression
Internally Biased VCC
TSD, UVLO, OLP, SCP, Open-Loop Protection