Infineon Technologies PTFA043002E V1

Overview

PTFA043002E from Infineon Technologies is a 300 W, 470–860 MHz thermally-enhanced LDMOS push-pull RF power transistor in H-30275-4 flange-mount package, optimized for ATSC 8VSB and DVB-COFDM broadcast amplifiers with 16 dB gain, 41% drain efficiency at 300 W PEP, and –29 dBc IMD at 860 MHz.

For engineers reviewing the PTFA043002E datasheet, PTFA043002E pinout, PTFA043002E application, or PTFA043002E equivalent, this device is selected for high-reliability UHF broadcast final-stage amplification where VSWR tolerance, thermal stability, and broadband linearity are critical design constraints.

Technical Context

This LDMOS FET operates in common-source push-pull configuration with internal broadband matching across 470–860 MHz. It delivers 300 W peak envelope power (PEP) at 32 V supply with 1.55 A quiescent drain current per side, supporting both analog NTSC and digital 8VSB/COFDM waveforms without external tuning.

Thermal design centers on its 0.23 °C/W junction-to-case resistance and 200 °C maximum junction temperature, enabled by full gold metallization and thermally enhanced H-30275-4 package. ESD protection meets HBM Class 2 (≥2 kV) standard.

Key Specifications

Pinout & Package

H-30275-4 is a thermally enhanced, flange-mounted ceramic/metal package with isolated source terminals and integrated gate protection diodes. Flange is electrically connected to source and serves as primary thermal path.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar UHF broadcast power amplifier applications.

Compared with PTFA043002E, PTFA043001E trades 33% peak power for reduced thermal mass and cost, while BLF8G27LS-250 offers alternate supply chain but demands additional matching network design effort and yields 2 dB lower gain.

Availability

PTFA043002E is available at Aetrix Electronics and suitable for ATSC broadcast transmitters, DVB-T headend amplifiers, and UHF analog repeaters requiring stable component supply, long-lifecycle support, and traceable industrial-grade RF power semiconductors.

Supply support for PTFA043002E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, RF, and automotive ICs, with leadership in high-voltage and high-frequency discrete devices.

The PTFA series belongs to Infineon's GOLDMOS® LDMOS portfolio, engineered specifically for high-efficiency, high-reliability UHF broadcast infrastructure where thermal resilience and spectral purity are non-negotiable.

FAQ

What is the recommended gate bias voltage for linear 8VSB operation?

The datasheet specifies V_GS = 2.5 V typical per side at I_DQ = 0.75 A/side and V_DS = 28 V. For 8VSB linearity, maintain gate bias within 2.0–3.0 V range using temperature-compensated bias networks; the reference circuit uses adjustable 2 kΩ potentiometers for fine-tuning.

Can PTFA043002E operate safely into a 5:1 VSWR load?

Yes-this device is explicitly rated for indefinite 300 W CW operation into 5:1 VSWR at 32 V, verified per JEDEC JESD22-A108. Its ruggedness stems from internal gate protection diodes, low R_DS(on), and thermally optimized package, eliminating need for external foldback or circulator protection.

Is external matching required for narrowband 700 MHz LTE band operation?

No external matching is needed for broadband use between 470–860 MHz, including 700 MHz LTE Band 12/13/17. The internal matching achieves <1.5:1 VSWR across this range; however, for maximum efficiency at fixed 700 MHz, minor output tuning with the reference circuit's C17/C24 capacitors is recommended.

What thermal interface material is recommended for flange mounting?

A 0.1 mm thick, thermally conductive (≥3 W/m·K), electrically insulating pad-such as Bergquist Sil-Pad 2000 or Parker Chomerics T-flex 300-is recommended. Avoid thermal paste alone; the flange must make full-area contact with a flat, grounded heatsink surface to achieve the specified 0.23 °C/W R_θJC.