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MP155 Energy Efficient Off-line Regulator TSOT23
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pMPS MP155 — Energy Efficient Off-line Regulator, TSOT23./p
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MP155 Energy Efficient Off-line Regulator TSOT23
The MPS MP155 is a Energy Efficient Off-line Regulator. It is supplied in a TSOT23 package.
The MP155 is a primary-side regulator that provides accurate constant voltage regulation without the opto-coupler, and supports Buck, Buck-boost, Boost and Flyback topologies.
Key Specifications
| Part Number | MP155 |
| Function | Energy Efficient Off-line Regulator |
| Output Power | 4 W |
| Package | TSOT23 |
| Ordering Codes | MP155 |
Features
- Primary-side constant voltage (CV) control, supporting Buck, Buck-boost, Boost and Flyback topologies
- Integrated 500V/20Ω 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
Typical Application Circuit
Applications
- Home Appliances, white goods and consumer electronics
- Industrial Controls
Design Notes
- The PFC inductor must support the maximum duty cycle at the lowest line voltage, which is where saturation risk peaks.
- High-voltage startup and X-capacitor discharge paths dominate no-load standby loss; verify them against the efficiency target.
- Leakage inductance and the RCD clamp set the turn-off loss — snubber values are a thermal trade-off, not a fixed recipe.
- Synchronous rectification timing must track the primary switching; a mistimed SR FET conducts through its body diode and fails hot.
Common Questions
Which package and ordering codes apply to the MP155?
TSOT23; order codes include MP155.
What are the defining features of the MP155?
Primary-side constant voltage (CV) control, supporting Buck, Buck-boost, Boost and Flyback topologies Integrated 500V/20Ω MOSFET
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