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MP4078 Single-Stage Offline Controller SOIC
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pMPS MP4078 — Single-Stage Offline Controller, SOIC./p
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MP4078 Single-Stage Offline Controller SOIC
The MPS MP4078 is a Single-Stage Offline Controller. It is supplied in a SOIC package.
The MP4078 is an single-stage offline controller with active power factor correction (PFC) for constant voltage output applications.
Key Specifications
| Part Number | MP4078 |
| Function | Single-Stage Offline Controller |
| Package | SOIC |
| Ordering Codes | MP4078 |
Features
- Primary-Side Control with Simple Design and Minimal External Components
- Ultra-Low No-Load Power Consumption, Typically below 50mW with 230VAC
- Good Performance on PF and THD
- Fast Transient Response
- Fast Start-Up
- Novel Control Scheme with Continuous Peak Current Limitation
- Primary-Side Over-Current Protection (OCP)
- Output Over-Voltage Protection (OVP)
- Output Short-Circuit Protection (SCP)
- Brownout Protection
Typical Application Circuit
Applications
- Smart LED Lighting
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 MP4078?
SOIC; order codes include MP4078.
What are the defining features of the MP4078?
Primary-Side Control with Simple Design and Minimal External Components Ultra-Low No-Load Power Consumption, Typically below 50mW with 230VAC
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