BLF984PU

Overview

The Ampleon BLF984PU is a 450 W LDMOS RF power transistor designed for broadcast Doherty, class-AB transmitter, and industrial applications. It operates in the frequency range from 30 MHz to 860 MHz with excellent ruggedness suitable for digital and analog signals. The device features integrated double-sided ESD protection and high power gain. At 700 MHz under pulsed CW conditions (VDS=50 V, IDq=2x325 mA), it delivers 450 W peak output power with 22 dB gain and 67.5% drain efficiency. In continuous DVB-T operation at 700 MHz, it provides 80 W average output power with 22.5 dB gain and 34% efficiency. The BLF984P uses SOT1121A package, while BLF984PS uses SOT1121B.

Feature Summary

• Designed for broadband and Doherty operation
• Integrated double-sided ESD protection
• Excellent ruggedness withstanding VSWR >= 40:1
• High power gain and efficiency

Applications

• Broadcast transmitter applications in the UHF band
• Digital and analog broadcasting
• Industrial, scientific and medical applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to ensure correct package selection. The BLF984P corresponds to the flanged ceramic package SOT1121A with mounting holes, whereas the BLF984PS denotes the earless flanged variant SOT1121B. Confirm RoHS compliance status directly with the supplier or official documentation prior to procurement.

Selection Notes

Select the BLF984P for designs requiring two mounting holes on the flange, or the BLF984PS for earless flanged configurations. Ensure thermal management supports the junction-to-case thermal resistance of 0.23 K/W at 85°C case temperature. Verify that the application circuit maintains VDS within 108 V limits and accounts for the 225°C maximum junction temperature rating during high-power operation.

Part Context

The BLF984PU belongs to Ampleon's Power LDMOS transistor series, specifically engineered for high-efficiency broadband applications. It complements other RF power devices by offering robust performance in the 30 MHz to 860 MHz range. The product line emphasizes reliability and ease of power control for demanding broadcast and industrial environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Ampleon technical support for potential cross-references or updated component equivalents.