The Philips BLF1043 is a 10 W LDMOS power transistor designed for base station applications at frequencies from HF to 1000 MHz. It operates in class-AB mode with a supply voltage of 26 V and a quiescent current of 85 mA, delivering typical two-tone performance of 18.5 dB gain, 40% efficiency, and -31 dBc intermodulation distortion at 960 MHz.
The device features an SOT538A SMD package with no internal matching for broadband operation, excellent thermal stability, and ruggedness capable of withstanding a 10:1 VSWR load mismatch. The datasheet includes limiting values, thermal characteristics, electrical characteristics, a 960 MHz class-AB test circuit with component list, and impedance data.
| Storage temperature range | -65 to +150 °C |
|---|---|
| Maximum junction temperature | 200 °C |
| Typical two-tone output power (PEP) | 10 W |
| Typical two-tone power gain | 18.5 dB |
| Typical two-tone efficiency | 40% |
| Typical two-tone IMD | -31 dBc |
| Package type | SOT538A SMD |
| Ruggedness (VSWR) | 10:1 |
| Operating frequency range | HF to 1000 MHz |
| Supply voltage (typical) | 26 V |
The BLF1043 uses an SOT538A SMD package.
At 26 V supply and 85 mA quiescent current, the typical two-tone output power is 10 W PEP with 18.5 dB gain, 40% efficiency, and intermodulation distortion below 31 dBc.
The thermal resistance from junction to heatsink is 9 K/W.