BLF278

Download datasheet This product has been discontinued.
Click here for discontinuation information.
This product has been discontinued. Click here for discontinuation information.
The replacement is: BLF184XR

VHF push-pull power MOS transistor

Dual push-pull silicon N-channel enhancement mode vertical D-MOS transistor encapsulated in a 4-lead, SOT262A1 balanced flange package with two ceramic caps. The mounting flange provides the common source connection for the transistors.

Features and benefits

  • High power gain
  • Easy power control
  • Good thermal stability
  • Gold metallization ensures excellent reliability

Applications

  • Broadcast transmitters in the VHF frequency range.

Parametrics

Symbol Parameter Conditions Min Typ/Nom Max Unit
frange frequency range 50 225 MHz
PL(1dB) nominal output power at 1 dB gain compression 300 W
Test signal: CW
Gp power gain PL = 250 W; VDS = 50 V [0] 14 16 dB
ηD drain efficiency PL = 250 W; VDS = 50 V; f = 225 MHz; IDq = 500 mA [0] 50 55 %
PL output power [0] 250 W

Package / Packing

All type numbers in the table below are discontinued.

Type number Package Outline version Reflow-/Wave
soldering
Packing Product status Marking Orderable part number,
(Ordering code (12NC))
BLF278 CDFM4
(SOT262A1)
sot262a1_po Bulk Pack Discontinued Standard Marking BLF278,112
(9339 785 20112)
BLF278/01 CDFM4
(SOT262A1)
sot262a1_po Bulk Pack Discontinued Standard Marking BLF278/01,112
(9340 318 50112)

Discontinuation information

Type number Ordering code (12NC) Last-time buy date Last-time delivery date Replacement product DN Notice Status Comments
BLF278 9339 785 20112 2014-03-31 2014-06-30 BLF184XR Ampleon-DN_201306022DN Full Withdrawal
BLF278/01 9340 318 50112 2014-03-31 2014-06-30 BLF184XR Ampleon-DN_201306022DN Full Withdrawal

Pinning info

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

Quality

All type numbers in the table below are discontinued.

Type number Orderable part number Chemical content RoHS / RHF Leadfree conversion date MSL MSL LF
Quality and reliability disclaimer

Ordering & availability

Type number Ordering code (12NC) Orderable part number Distributor Buy online Samples
BLF278 9339 785 20112 BLF278,112 DigiKey Buy Not available
RFMW Buy
BLF278/01 9340 318 50112 BLF278/01,112 DigiKey Buy Not available
RFMW Buy

Design support

Title Type Date
BLF278 50V 500mA S-parameter Data S-parameter 2012-06-08
BLF278 25V 500mA S-parameter Data S-parameter 2012-06-08