MP155

Offline Primary Side 3W Regulator, 100mW No-Load Power

Datasheet

Description

The MP155 is a primary-side regulator that provides accurate constant voltage regulation without the opto-coupler, and supports buck, buck-boost, and flyback topologies. An integrated 500V MOSFET simplifies the structure and reduces costs. These features make it a competitive candidate for off-line low-power applications, such as home appliances and standby power. The MP155 is a green-mode operation regulator. Both the peak current and the switching frequency decrease as the load decreases. As a result, it offers excellent efficiency performance at light load, thus improving the overall average efficiency. The MP155 features various protections such 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 & Benefits

Primary-side constant voltage (CV) control, supporting buck, buck-boost and flyback topologies
Integrated 500V/20O MOSFET
< 100mW No-load power consumption
Up to 4W 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

Active Part Numbers:

MP155GJ-P MP155GJ-Z MP155GS-Z MP155GS

Meaning of P & Z

Evaluation Tools

EV155-J-00A Evaluation Kit Energy Efficient Off-line Regulator, EV Board

The MP155 is a green-mode operation regulator. Both the peak current and the switching frequency decrease as the load decreases. As a result, it offers excellent efficiency performance at light load, thus improving the overall average efficiency.

The MP155 features various protections such 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 package.