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MP6903 8-24V, 400kHz Fast Turn-off Intelligent Controller SOIC8
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pMPS MP6903 — Fast Turn-off Intelligent Controller, 8-24V input, SOIC8./p
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MP6903 8-24V, 400kHz Fast Turn-off Intelligent Controller SOIC8
The MPS MP6903 is a Fast Turn-off Intelligent Controller. It operates from a 8 V to 24 V input and switches at 400 kHz. It is supplied in a SOIC8 package.
The MP6903 is a low-drop diode emulator that, combined with an external switch, replaces Schottky diodes in high-efficiency LLC converters.
Key Specifications
| Part Number | MP6903 |
| Function | Fast Turn-off Intelligent Controller |
| Input Voltage | 8 V to 24 V |
| Switching Frequency | 400 kHz |
| Quiescent Current | 300 µA |
| Package | SOIC8 |
| Ordering Codes | MP6903 |
Features
- Works with Standard and Logic-Level FETS
- Compatible with Energy Star, 1W Standby Requirements
- VDD Range from 8V to 24V
- 70mV VDS Regulation Function (1)
- Fast Turn-Off: Total Delay of 20ns
- Max 400kHz Switching Frequency
- Light Load Mode Function (1) with <300µA Quiescent Current
- Supports DCM, CCM and CrCM Operation
- Supports High-Side and Low-Side Rectification
- Power Savings of Up to 1.5W for a Typical Notebook Adapter
Typical Application Circuit
Applications
- Industrial Power Systems
- Distributed Power Systems
- Battery Powered Systems
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
What input voltage does the MP6903 support?
8 V to 24 V.
Which package and ordering codes apply to the MP6903?
SOIC8; order codes include MP6903.
What are the defining features of the MP6903?
Works with Standard and Logic-Level FETS Compatible with Energy Star, 1W Standby Requirements
Shenzhen Gaorunxin Technology Co., Ltd
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