Overview
The BLF278 is a dual push-pull silicon N-channel enhancement mode vertical D-MOS transistor produced by Ampleon USA Inc. This device is encapsulated in a 4-lead SOT262A1 balanced flange package, which includes two ceramic caps. The mounting flange provides the common source connection for the transistors. The BLF278 is designed for high-power applications, particularly in the VHF frequency range, and has been transferred from Ampleon to Rochester Electronics.
Key Specifications
| Symbol | Parameter | Conditions | Min | Typ/Nom | Max | Unit |
|---|---|---|---|---|---|---|
| f range | frequency range | - | 50 | 225 | - | MHz |
| P L(1dB) | nominal output power at 1 dB gain compression | Test signal: CW | - | - | 300 | W |
| G p | power gain | P L = 250 W; V DS = 50 V | 14 | 16 | - | dB |
| η D | drain efficiency | P L = 250 W; V DS = 50 V; f = 225 MHz; I Dq = 500 mA | 50 | 55 | - | % |
| P L | output power | - | - | 250 | W | |
| V DS | supply voltage | - | - | 50 | V | |
| Package | - | - | - | SOT262A1 | - | - |
Key Features
- High power gain
- Easy power control
- Good thermal stability
- Gold metallization ensures excellent reliability
- Compact size and robust design using microstrip technology
Applications
- Broadcast transmitters in the VHF frequency range
- FM radio transmitters
- High-power RF amplifiers
Q & A
- What is the frequency range of the BLF278? The BLF278 operates in the frequency range of 50 to 225 MHz.
- What is the nominal output power at 1 dB gain compression for the BLF278? The nominal output power at 1 dB gain compression is 300 W.
- What is the power gain of the BLF278? The power gain of the BLF278 is typically 16 dB.
- What is the drain efficiency of the BLF278? The drain efficiency of the BLF278 is typically 55%.
- What is the supply voltage for the BLF278? The supply voltage for the BLF278 is 50 V.
- In what package is the BLF278 encapsulated? The BLF278 is encapsulated in a 4-lead SOT262A1 balanced flange package.
- What are the key features of the BLF278? Key features include high power gain, easy power control, good thermal stability, and gold metallization for excellent reliability.
- What are the typical applications of the BLF278? Typical applications include broadcast transmitters in the VHF frequency range and FM radio transmitters.
- Has the BLF278 been discontinued? Yes, the BLF278 has been discontinued and transferred from Ampleon to Rochester Electronics.
- What is the recommended replacement for the BLF278? For FM radio transmitters, the SD2942 FM Pallet is recommended as a replacement.
