BLF878 NXP Semiconductors, BLF878 Datasheet

LDMOS,RF,300W,UHF,50V

BLF878

Manufacturer Part Number
BLF878
Description
LDMOS,RF,300W,UHF,50V
Manufacturer
NXP Semiconductors
Datasheet

Specifications of BLF878

Transistor Type
RF MOSFET
Drain Source Voltage Vds
89V
Continuous Drain Current Id
7.6A
Operating Frequency Range
1.3GHz
Rf Transistor Case
SOT-979A
No. Of Pins
4
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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1. Product profile
CAUTION
1.1 General description
1.2 Features
A 300 W LDMOS RF power transistor for broadcast transmitter applications and industrial
applications. The transistor can deliver 300 W broadband over the full UHF band from
470 MHz to 860 MHz. The excellent ruggedness and broadband performance of this
device makes it ideal for digital transmitter applications.
Table 1.
RF performance at V
[1]
[2]
I
I
Mode of operation f
CW, class AB
2-Tone, class AB
PAL BG
DVB-T (8k OFDM)
BLF878
UHF power LDMOS transistor
Rev. 02 — 15 June 2009
2-Tone performance at 860 MHz, a drain-source voltage V
drain current I
DVB performance at 858 MHz, a drain-source voltage V
drain current I
Black video signal, sync expansion: input sync = 33 %; output sync
Measured [dBc] with delta marker at 4.3 MHz from center frequency.
N
N
N
N
N
N
N
N
This device is sensitive to ElectroStatic Discharge (ESD). Therefore care should be taken
during transport and handling.
Peak envelope power load power = 300 W
Power gain = 21 dB
Drain efficiency = 46 %
Third order intermodulation distortion = 35 dBc
Average output power = 75 W
Power gain = 21 dB
Drain efficiency = 32 %
Third order intermodulation distortion = 32 dBc (4.3 MHz from center frequency)
Typical performance
Dq
Dq
DS
(MHz)
860
f
860 (ch69)
858
= 1.4 A:
= 1.4 A:
1
= 42 V in a common-source 860 MHz narrowband test circuit.
= 860; f
2
= 860.1 -
P
(W)
300
300 (peak sync.)
-
L
[1]
P
(W)
-
300
-
-
L(PEP)
DS
27 %.
DS
of 42 V and a quiescent
of 42 V and a quiescent
P
(W)
-
-
-
75
Product data sheet
L(AV)
G
(dB) (%) (dBc)
21
21
21
21
p
60
46
45
32
D
IMD3
-
-
35
32
[2]

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BLF878 Summary of contents

Page 1

... BLF878 UHF power LDMOS transistor Rev. 02 — 15 June 2009 1. Product profile 1.1 General description A 300 W LDMOS RF power transistor for broadcast transmitter applications and industrial applications. The transistor can deliver 300 W broadband over the full UHF band from 470 MHz to 860 MHz. The excellent ruggedness and broadband performance of this device makes it ideal for digital transmitter applications ...

Page 2

... Description drain1 drain2 gate1 gate2 [1] source Ordering information Name Description - flanged LDMOST ceramic package; 2 mounting holes; 4 leads SOT979A Rev. 02 — 15 June 2009 UHF power LDMOS transistor Simplified outline Graphic symbol © NXP B.V. 2009. All rights reserved. BLF878 sym117 Version ...

Page 3

... Conditions Min Typ Max [ 2. [ 225 GSth [ GSth MHz [ MHz [ MHz BLF878 Max Unit 89 V +11 V +150 C 200 C Typ Unit [1] 0.23 K/W [2] 0.15 K/W Unit - 105.5 V 1 140 nA 15 110 - m 190 - © NXP B.V. 2009. All rights reserved ...

Page 4

... RF performance in a common-source narrowband 860 MHz test circuit f (MHz 860 860 858 Rev. 02 — 15 June 2009 UHF power LDMOS transistor 001aai075 ( L(PEP) L(AV) p (V) (A) (W) (W) (dB) (%) [1] 40 1.4 300 - > 18 > 42 < 31 [ > 18 > 29 < 29 © NXP B.V. 2009. All rights reserved. BLF878 IMD3 D (dBc) [ ...

Page 5

... 100 I = 1.4 A; measured in a common source narrowband 860 MHz test circuit power gain and drain efficiency as a function of load power; typical values Rev. 02 — 15 June 2009 BLF878 UHF power LDMOS transistor 001aai076 80 (2) D (%) (1) 60 ( 200 300 400 P (W) L © NXP B.V. 2009. All rights reserved. ...

Page 6

... UHF power LDMOS transistor (1) ( 100 200 300 I = 1.4 A; measured in a common source narrowband Dq 860 MHz test circuit 2-Tone third order intermodulation distortion as a function of average load power; typical values © NXP B.V. 2009. All rights reserved. BLF878 001aai078 400 P (W) L(AV ...

Page 7

... L(AV 860 MHz test circuit Fig 6. DVB-T third order intermodulation distortion as a function of average load power; typical values Rev. 02 — 15 June 2009 BLF878 UHF power LDMOS transistor 001aai080 (1) (2) 50 100 150 200 P L(AV) = 1.4 A; measured in a common source narrowband = © NXP B.V. 2009. All rights reserved. ...

Page 8

... UHF power LDMOS transistor 0 20 (1) ( 400 500 600 700 800 P = 150 1.4 A; measured in a common L(AV) Dq source broadband test circuit as described 2-Tone third order intermodulation distortion as a function of frequency; typical values © NXP B.V. 2009. All rights reserved. BLF878 001aai082 900 f (MHz) Section ...

Page 9

... UHF power LDMOS transistor 0 20 (1) ( 400 500 600 700 800 1.4 A; measured in a common L(AV) Dq source broadband test circuit as described function of frequency; typical values 001aai085 (2) (1) 800 900 f (MHz) Section 8. © NXP B.V. 2009. All rights reserved. BLF878 001aai084 900 f (MHz) Section ...

Page 10

... NXP Semiconductors 7.3 Ruggedness in class-AB operation The BLF878 is capable of withstanding a load mismatch corresponding to VSWR = through all phases under the following conditions: V power. 7.4 Impedance information Fig 12. Definition of transistor impedance Table 8. Simulated Z f MHz 300 325 350 375 400 425 450 ...

Page 11

... Reliability Years (1) T (2) T (3) T (4) T (5) T (6) T (7) T (8) T (9) T (10) T (11) T Fig 13. BLF878 electromigration (I BLF878_2 Product data sheet Typical push-pull impedance and Z device impedance; impedance info 5.103 + j4.467 5.656 + j4.291 6.205 + j3.963 6.696 + j3.463 6 10 ...

Page 12

... F 470 0 4 3.9 pF 4.7 pF 100 pF 560 5 2.2 F/m; height = 0.79 mm; Cu (top/bottom metallization); r Rev. 02 — 15 June 2009 BLF878 UHF power LDMOS transistor Remarks EZ90-25-TP [1] [2] [2] [1] [2] [2] [1] [2] TDK C570X7R1H106KT000N or capacitor of same quality. [3] Tekelec [3] [3] [3] [3] [ 24.5 mm [4] ...

Page 13

... Fig 15. Printed-Circuit Board (PCB) for class-AB common source amplifier BLF878_2 Product data sheet C13 C22 C21 C20 L21 L20 C14 , V D1(test L20 L1 L21 Rev. 02 — 15 June 2009 BLF878 UHF power LDMOS transistor + V D1(test) C15 C17 D2(test) C16 C18 , V and V are drain and gate D2(test) G1(test) ...

Page 14

... Fig 16. Component layout for class-AB common source amplifier BLF878_2 Product data sheet 4 3 C23 C21 C24 C22 C1 C20 12 mm Rev. 02 — 15 June 2009 UHF power LDMOS transistor C13 +V D1(test) C15 C17 C11 C12 C18 C16 C14 +V D2(test © NXP B.V. 2009. All rights reserved. BLF878 C10 001aai090 ...

Page 15

... European projection © NXP B.V. 2009. All rights reserved. BLF878 SOT979A 0.25 0.010 10.29 0.25 0.51 10.03 0.405 0.010 0.020 0.395 ...

Page 16

... Voltage Standing-Wave Ratio Data sheet status Product data sheet 3: changed maximum value changed several values. 4: removed PAR specification. Preliminary data sheet Rev. 02 — 15 June 2009 BLF878 UHF power LDMOS transistor Change notice Supersedes - BLF878_1 . © NXP B.V. 2009. All rights reserved ...

Page 17

... Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. http://www.nxp.com salesaddresses@nxp.com Rev. 02 — 15 June 2009 BLF878 UHF power LDMOS transistor © NXP B.V. 2009. All rights reserved ...

Page 18

... Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP B.V. 2009. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com BLF878 All rights reserved. Date of release: 15 June 2009 Document identifier: BLF878_2 ...

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