MP155

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


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Product 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.

Product Features

  • 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

Parametrics

  • Vac (max) (V)265
  • Vfb (V)2.5
  • ICC Latch (typ) (µA)16
  • Vbr (V)500
  • Rds(on) (Ω)20
  • fsw (max) (kHz)56
  • Isw Limit (mA)290
  • Iout (DCM) (max) (mA)130
  • Iout (CCM) (max) (mA)220
  • Pout (max) (W)3
  • Vac (min) (V)20
  • VCC Off (V)3.4
  • Power Range DefinedNo
  • Control MethodOn-Off
  • PackageSOIC-8, TSOT23-5
  • GradeCatalog
  • TypeBuck Regulator
  • VCC Hysteresis (V)0.25
  • Min Off Time (typ) (µs)18
  • VCC Restart (V)2.4
  • No-Load Pout (max) (mW)100
  • Iregulator (mA)3.5
  • Ileak (µA)10

Evaluation Kit

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Kit details

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 package.

$25.00 + tax