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HF900 300kHz Offline Switching Regulator SOIC14
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pMPS HF900 — Offline Switching Regulator, SOIC14./p
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HF900 300kHz Offline Switching Regulator SOIC14
The MPS HF900 is a Offline Switching Regulator. It switches at 300 kHz. It is supplied in a SOIC14 package.
The HF900 is a flyback regulator with an integrated 900V MOSFET.
Key Specifications
| Part Number | HF900 |
| Function | Offline Switching Regulator |
| Switching Frequency | 300 kHz |
| Package | SOIC14 |
| Ordering Codes | HF900 |
Features
- Internal Integrated 900V MOSFET
- Programmable Fixed Switching Frequency up to 300kHz
- Frequency Jittering
- Current-Mode Operation
- Internal High-Voltage Current Source
- Low Standby Power Consumption via Active Burst Mode
- Internal Leading Edge Blanking
- Built-In Soft-Start Function
- Internal Slope Compensation
- Built-In Input Over-Voltage Protection
Typical Application Circuit
Applications
- Smart Power Meters
- Large Appliances
- 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 HF900?
SOIC14; order codes include HF900.
What are the defining features of the HF900?
Internal Integrated 900V MOSFET Programmable Fixed Switching Frequency up to 300kHz
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