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MP173A 280mA Offline Regulator TSOT23
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pMPS MP173A — Offline Regulator, 280 mA output, TSOT23./p
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MP173A 280mA Offline Regulator TSOT23
The MPS MP173A is a Offline Regulator. It is rated for 280 mA. It is supplied in a TSOT23 package.
The MP173A is a primary-side regulator that provides accurate constant voltage (CV) regulation without an optocoupler.
Key Specifications
| Part Number | MP173A |
| Function | Offline Regulator |
| Current Rating | 280 mA |
| Output Power | 4 W |
| Package | TSOT23 |
| Ordering Codes | MP173A |
Features
- 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
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 MP173A?
TSOT23; order codes include MP173A.
What are the defining features of the MP173A?
Primary-Side CV Control Supporting Buck, Buck-Boost, Boost, and Flyback Topologies
Shenzhen Gaorunxin Technology Co., Ltd
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