BLF2043,112

Overview

The BLF2043 is a UHF power LDMOS transistor designed for broadband operation from HF to 2200 MHz. It delivers 10 W PEP output power with 12 dB gain at 26 V supply voltage and 85 mA quiescent current. The device features excellent ruggedness, capable of withstanding a VSWR of 10:1 through all phases at 2000 MHz. Key electrical parameters include a drain-source breakdown voltage of 65 V, maximum drain current of 2.2 A, and thermal resistance of 9 K/W. It utilizes the SOT538A ceramic surface-mounted package.

Feature Summary

• Broadband capability without internal matching components
• High power gain and efficiency in class-AB operation
• Excellent thermal stability and ruggedness under mismatched load conditions

Applications

• RF power amplifiers for GSM, EDGE, and CDMA base stations
• Multicarrier applications in the HF to 2200 MHz frequency range
• Broadcast drivers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging type and production status. Ensure compatibility with the SOT538A footprint during integration. Confirm RoHS compliance and lead times directly with authorized distributors or Ampleon sales offices prior to procurement.

Selection Notes

Select this component for designs requiring high linearity and power density across wide bandwidths. Ensure the PCB layout supports the SOT538A mounting requirements and provides adequate thermal management to maintain junction temperature within limits. Verify that the bias circuitry can support the specified quiescent current for optimal performance.

Part Context

The BLF2043 belongs to the family of UHF power LDMOS transistors manufactured by Ampleon. Originally developed under Philips Semiconductors, it remains a standard solution for broadband RF power amplification. The device is distinct from lower-power variants and higher-frequency counterparts within the same product portfolio.

Replacement Considerations

Consult the official Ampleon replacement guide for direct substitutes. Verify pinout compatibility and thermal characteristics when considering alternative part numbers from other manufacturers.