NXP Semiconductors BLF4G20LS-130,112

Overview

BLF4G20LS-130 from NXP Semiconductors is a 130 W UHF LDMOS power transistor designed for base station RF power amplification in the 1800–2000 MHz band, operating at 28 V supply with 900 mA quiescent drain current, delivering 60 W average output in GSM EDGE mode, 14.8 dB power gain, and −62 dBc ACPR400.

For engineers reviewing the BLF4G20LS-130 datasheet, BLF4G20LS-130 pinout, BLF4G20LS-130 application, or BLF4G20LS-130 equivalent, key selection criteria include broadband 1800–2000 MHz operation, ruggedness under 10:1 VSWR mismatch, thermal resistance of 0.49 K/W, and internally matched ceramic SOT502B package for simplified RF design.

Technical Context

This LDMOS transistor operates in class-AB with fixed 28 V drain-source voltage and 900 mA IDq, supporting CW, 2-tone, and modulated (GSM EDGE) modes across 1930–1990 MHz. Its gate-source threshold voltage is 2.9 V (typ), and it sustains 200 °C junction temperature with 65 V V_DS maximum rating.

The device delivers 130 W PEP in CW mode with 14.5 dB gain and 50% drain efficiency, while maintaining −30 dBc third-order IMD and <2.1% EVM_rms in EDGE applications - enabled by high forward transconductance (11 S) and low R_DS(on) (0.065 Ω).

Key Specifications

Pinout & Package

Package: Earless flanged LDMOST ceramic package (SOT502B), thermally optimized with metal flange directly connected to source terminal for low-inductance grounding and efficient heat transfer to heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PD57018-E and MRF6VP21K25HR5, the BLF4G20LS-130 offers superior VSWR ruggedness and factory internal matching - reducing bill-of-materials count and simplifying layout for mid-power macrocell and repeater applications where 130 W PEP suffices.

Availability

BLF4G20LS-130 is available at Aetrix Electronics and suitable for GSM/EDGE base station amplifiers, multi-carrier CDMA transmitters, UMTS repeaters, and broadband wireless access systems requiring stable component supply and long-term industrial lifecycle support.

Supply support for BLF4G20LS-130 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and communications markets, with deep expertise in RF power technology.

The BLF4G20LS-130 belongs to NXP's UHF LDMOS transistor product line, engineered specifically for high-efficiency, high-reliability RF power amplification in cellular infrastructure equipment operating between 1800 MHz and 2000 MHz.

FAQ

What is the maximum junction temperature specification for the BLF4G20LS-130?

The BLF4G20LS-130 has a maximum junction temperature (T_j) rating of 200 °C, as defined in Table 4 of its NXP datasheet. This allows sustained operation under high-power conditions when paired with appropriate heatsinking and case temperature control - the device is characterized at T_case = 80 °C with R_th(j-case) = 0.49 K/W, meaning BLF4G20LS-130 can dissipate up to ~50 W continuously without exceeding T_j = 200 °C.

Does the BLF4G20LS-130 require external matching networks for 1930–1990 MHz operation?

No, the BLF4G20LS-130 is internally matched for 50 Ω operation across 1800–2000 MHz, as confirmed in Section 1.2 ("Features") and Table 1 of the NXP datasheet. It delivers specified gain, efficiency, and linearity without external broadband matching components - though narrowband tuning may still be applied for optimization in specific carrier frequencies within that band.

What is the gate-source threshold voltage (V_GS(th)) range for the BLF4G20LS-130?

The BLF4G20LS-130 has a gate-source threshold voltage range of 2.5 V to 3.5 V (min to max), with a typical value of 2.9 V, measured at V_DS = 10 V and I_D = 230 mA (Table 6). This parameter defines the minimum gate voltage required to initiate conduction and is critical for setting accurate quiescent bias - the device operates at V_GSq = 2.65–3.65 V under nominal 28 V, 900 mA conditions.

How does the BLF4G20LS-130 perform under load mismatch conditions?

The BLF4G20LS-130 is rated for unconditional ruggedness under 10:1 VSWR mismatch at all phase angles when biased at V_DS = 28 V, I_Dq = 900 mA, and delivering 130 W CW at 1990 MHz (Section 7.1). This capability eliminates the need for external circulators or VSWR foldback protection in most deployed base station environments - a key differentiator versus many competing LDMOS transistors limited to 4:1 or 6:1 VSWR tolerance.

Is the BLF4G20LS-130 suitable for GSM EDGE modulation with EVM compliance?

Yes, the BLF4G20LS-130 is explicitly characterized for GSM EDGE operation, delivering 2.1% EVM_rms at 60 W average output, 28 V, and 1990 MHz (Table 1 and Figure 7). Its −62 dBc ACPR400 and −73 dBc ACPR600 meet 3GPP TS 45.005 requirements for Class IV base stations - confirming BLF4G20LS-130 is qualified for commercial EDGE infrastructure deployment.