UHF power LDMOS transistor

A 1000 W LDMOS RF power transistor for asymmetrical broadcast Doherty transmitter applications which operates at 180 W DVB-T average power. The excellent ruggedness of this device makes it ideal for digital and analog transmitter applications.

Features and benefits

  • Designed for asymmetric Doherty operation
  • Very high efficiency enabling air cooled high power transmitters
  • Integrated ESD protection
  • Excellent ruggedness
  • High power gain
  • Excellent reliability
  • Easy power control
  • For RoHS compliance see the product details on the Ampleon website


  • Broadcast transmitter applications in the UHF band
  • Digital broadcasting


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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 1000 W
Test signal: DVB-T (8k OFDM), Doherty operation
VDS drain-source voltage [0] 50 V
Gp power gain f = 550 MHz [0] 18.6 20 dB
ηD drain efficiency f = 550 MHz [0] 50 52 %
PL(AV) average output power f = 550 MHz [0] 180 W
IDq quiescent drain current peak section: VGS = 1.3 V below VGS(th) (peak) [0] 600 mA
PAR peak-to-average ratio f = 550 MHz [0] 6.9 7.4 dB

Package / Packing

Type number Package Outline version Reflow-/Wave
Packing Product status Marking Orderable part number,
(Ordering code (12NC))
sot539a_po Bulk Pack Active Standard Marking BLF989EU
(9349 602 21112)

Pinning info

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


Type number Orderable part number Chemical content RoHS / RHF Leadfree conversion date MSL MSL LF
BLF989E BLF989EU BLF989E Always Pb-free 1 1
Quality and reliability disclaimer

Ordering & availability

Type number Ordering code (12NC) Orderable part number Distributor Buy online Samples
BLF989E 9349 602 21112 BLF989EU RFMW Buy Request samples
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