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MP6909 Fast Turn-Off Intelligent Rectifier TSOT23
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pMPS MP6909 — Fast Turn-Off Intelligent Rectifier, TSOT23./p
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MP6909 Fast Turn-Off Intelligent Rectifier TSOT23
The MPS MP6909 is a Fast Turn-Off Intelligent Rectifier. It is supplied in a TSOT23 package.
The MP6909 is a low-drop diode emulator IC that, when combined with an external switch, replaces Schottky diodes in high-efficiency flyback converters.
Key Specifications
| Part Number | MP6909 |
| Function | Fast Turn-Off Intelligent Rectifier |
| Quiescent Current | 100 µA |
| Package | TSOT23 |
| Ordering Codes | MP6909 |
Features
- Supplied Voltage Internally Regulated
- Ringing Detection Prevents False Turn-On during DCM and Quasi-Resonant Operations
- Works with Standard and Logic Level SR MOSFETs
- Compatible with Energy Star
- ~30ns Fast Turn-Off and Turn-On Delay
- ~100µA Quiescent Current
- Supports DCM, CCM, and Quasi-Resonant Operations
- Supports both High-Side and Low-Side Rectification
- Available in a TSOT23-6 Package
Typical Application Circuit
Applications
- USB PD Quick Chargers
- Adaptors
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 MP6909?
TSOT23; order codes include MP6909.
What are the defining features of the MP6909?
Supplied Voltage Internally Regulated Ringing Detection Prevents False Turn-On during DCM and Quasi-Resonant Operations
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