BFS520 datasheet(67/130 Pages) NXP

67 / 130 page

NXP Semiconductors RF Manual 16th edition

2.5.5 Digitalbroadcastingatitsbest

The BLF881 / BLF888A transistor line-up enables today’s most powerful and

efficient digital broadcast transmitter applications

BLF881

This transistor is based on NXP’s 50 V LDMOS technology and

features 120 W RF output power for broadcast transmitter and

industrial applications. An unmatched device, the BLF881 can be

used in the HF to 1 GHz range. The excellent ruggedness and

broadband performance of this device make it ideal for digital

transmitter applications – either on its own or as a driver in

combination with the high-power transistor BLF888A.

The BLF881 is also available in an earless version, the BLF881S,

which enables an even more compact PCB design.

BLF888A

Running from a 50 V supply voltage, the BLF888A is a

600 W LDMOS RF power transistor for broadcast transmitter

and industrial applications. Being a matched device, the

BLF888A is optimized for digital signal broadcasting and

can deliver 120 W average DVB-T output power over the full

UHF band from 470 MHz to 860 MHz with 20 dB power gain

and 31% drain efficiency. The excellent ruggedness of this

transistor (it withstands a VSWR in excess of 40:1) makes it the

ultimate choice as final stage for digital transmitter applications

– ideally accompanied by a BLF881 as the driver. This device

is also available in an earless package, denoted BLF888AS, to

enable surface-mount assembly processes and take optimum

advantage of the very low thermal resistance of the package.

Key features and benefits

` Excellent efficiency and reliability

` Highest power levels in the market

` Best-in-class ruggedness designed into all devices

` Best broadband performance

` Easy power control

` Best-in-class design support

` Low thermal resistance design for unrivalled reliability

` Advanced flange material for optimum thermal behavior

and reliability

` Designed for broadband operation (470 to 860 MHz)

Key applications

` Analog and digital TV transmitters

brb339

typ. 0.5 kW

DVB-T

typ. 5 kW DVB-T

output power

TV exciter

DVB-T

Driver stages

amplifiers

harmonic

filter power

monitor

8×final

Type

Product

min(MHz)

max(MHz)

P1dB(W)

Matching

VDS(V)

L(W)

D(%)

p(dB)

Testsignal Package

BLF642

Driver

1400

SOT467C

BLF884P(S)

Final

470

860

300

150

SOT1121

BLF879P

470

860

500

200

SOT539A

BLF888A(S)

470

860

600

250

SOT539

BLF888B(S)

470

860

600

250

SOT539

BLF881(S)

1000

140

SOT467

BFS520 数据表(PDF) 67 Page - NXP Semiconductors

BFS520 数据表(HTML) 67 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载