This product is not recommended for design-in.
The recommended type is: BLF989S

UHF power LDMOS transistor

A 650W LDMOS RF power transistor for DVB-T broadcast applications optimised to give extremely high power and efficiency in Doherty solutions.


Whitepaper Doherty Architectures in UHF

This White Paper explains different PA architectures which can be used in today’s UHF Broadcast industry. 

In this paper a brief discussion will be given to explain these new Doherty architectures and to help customers finding the best solution for their transmitter. Ampleon’s transistor family BLF8XX can support these Doherty architectures.

Click here to download.

Features and benefits

  • Optimised for Doherty solutions in split-band (70MHz to 100MHz)
  • Extremely high power (P1dB 650W)
  • Extremely high Doherty efficiency (>50%)
  • Internal input matching for high gain
  • Optimum thermal behavior and reliability, Rth(j-c) = 0.15 K/W


  • Communication transmitter applications in the UHF band
  • Industrial applications in the UHF band


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All documentation

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Design tool

RF Power Lifetime Calculator


UHF power LDMOS transistor



Symbol Parameter Conditions Min Typ/Nom Max Unit
frange frequency range 470 860 MHz
PL(1dB) nominal output power at 1 dB gain compression 650 W
Test signal: DVB-T (8k OFDM)
Gp power gain VDS = 50 V; f = 858 MHz 20 21 dB
ηD drain efficiency VDS = 50 V; f = 858 MHz; IDq = 1.3 A 30 33 %
PL(AV) average output power VDS = 50 V; f = 858 MHz 120 W
IMDshldr intermodulation distortion shoulder attenuation f = 858 MHz [0] -31 -27 dBc
PAR peak-to-average ratio f = 858 MHz [1] 8.2 dB

Package / Packing

All type numbers in the table below are not recommended for design-in.

Type number Package Outline version Reflow-/Wave
Packing Product status Marking Orderable part number,
(Ordering code (12NC))
sot539b_po Bulk Pack Active Standard Marking BLF888BS,112
(9340 651 22112)

Pinning info

Pin Symbol Description Simplified outline Graphic symbol
1 D1 drain1
2 D2 drain2
3 G1 gate1
4 G2 gate2
5 S source


All type numbers in the table below are not recommended for design-in.

Type number Orderable part number Chemical content RoHS / RHF Leadfree conversion date MSL MSL LF
BLF888BS BLF888BS,112 BLF888BS Always Pb-free 1 1
Quality and reliability disclaimer

Ordering & availability

Type number Ordering code (12NC) Orderable part number Distributor Buy online Samples
BLF888BS 9340 651 22112 BLF888BS,112 RFMW Buy Request samples
DigiKey Buy

Design support

Title Type Date
PCB Design BLF888B(S) (Data sheet) Design support 2012-02-24
BLF888B ADS-2016 Simulation model 2017-01-04