Infineon Technologies BFP620FH7764XTSA1

Overview

BFP620FH7764XTSA1 from Infineon is a silicon-germanium carbon (SiGe:C) NPN RF bipolar transistor optimized for low-noise, high-gain amplification up to 6 GHz. It delivers NFmin = 0.7 dB at 1.8 GHz (1.5 V, 5 mA), Gms = 21 dB at 1.8 GHz (1.5 V, 50 mA), and OIP3 = 25 dBm at 1.8 GHz (2 V, 50 mA), targeting front-end LNAs in SDARS, ISM-band, and wireless infrastructure receivers.

For engineers reviewing the BFP620FH7764XTSA1 datasheet, BFP620FH7764XTSA1 pinout, BFP620FH7764XTSA1 application, or BFP620FH7764XTSA1 equivalent, key selection criteria include noise figure vs. bias current trade-offs, TSFP-4-1 thermal performance under pulsed RF operation, and SiGe:C process advantages over standard silicon RF transistors in gain-bandwidth product and linearity.

Technical Context

This device uses Infineon's sixth-generation SiGe:C heterojunction process, enabling fT = 65 GHz (VCE = 1.5 V, IC = 50 mA) and sub-1 dB noise figure at 1.8 GHz. Its dual-emitter configuration (Pins 2 and 4 both E) supports balanced LNA topologies and improves thermal dissipation in compact layouts.

The TSFP-4-1 package features a thermally enhanced leadframe with exposed emitter pads, supporting RthJS = 290 K/W and Ptot = 185 mW at TS ≤ 96 °C. Biasing requires stable 1.5–2.3 V VCE and precise 5–50 mA IC control to maintain NFmin and OIP3 across temperature.

Key Specifications

Pinout & Package

Package: TSFP-4-1 - ultra-thin, surface-mount, thermally optimized 4-pin leadframe with dual emitter terminals and exposed die pad for PCB heat sinking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF bipolar transistor applications.

Compared with BFP640F and NE85633, BFP620FH7764XTSA1 offers the best balance of sub-1 dB noise, 6 GHz bandwidth, AEC-Q101 compliance, and thermal efficiency-making it optimal for industrial and automotive-grade 1.8–6 GHz LNA designs where reliability and RF performance are jointly constrained.

Availability

BFP620FH7764XTSA1 is available at Aetrix Electronics and suitable for SDARS receivers, ISM-band sensor nodes, 5G FR1 small cells, and GNSS augmentation systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for BFP620FH7764XTSA1 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, automotive, and security ICs, with global manufacturing and R&D centers.

The BFP620F belongs to Infineon's sixth-generation SiGe:C RF transistor family, designed specifically for high-linearity, low-noise amplification in 1–6 GHz wireless infrastructure, satellite radio, and industrial IoT front ends.

FAQ

What is the recommended DC bias for minimum noise figure?

For NFmin = 0.7 dB at 1.8 GHz, bias the device at VCE = 1.5 V and IC = 5 mA with open-base configuration. Maintain stable base voltage using a high-impedance resistive divider or active bias circuit to avoid degrading noise performance through base current fluctuations.

Can Pins 2 and 4 (both E) be used independently?

No-Pins 2 and 4 are internally connected emitter terminals. They must be tied together externally to a common low-impedance ground plane. Using them separately violates the TSFP-4-1 mechanical and thermal design and risks uneven current sharing and thermal runaway.

Is the BFP620FH7764XTSA1 suitable for 5G NR n77 band (3.3–4.2 GHz)?

Yes-its Gma = 9.5 dB and NFmin = 1.1 dB at 4 GHz (per extrapolated data and measured 6 GHz performance) support n77 LNA use. Designers must verify impedance matching and thermal derating at 40–50 mA IC to sustain OIP3 > 22 dBm in continuous operation.

How does AEC-Q101 qualification impact board-level reliability?

AEC-Q101 validation confirms robustness against thermal cycling (−55 to +125 °C), humidity, and mechanical shock-critical for automotive infotainment modules. It mandates tighter parametric screening than industrial-grade parts, reducing early-life failure rates in vibration-prone environments.