1880 MHz PA Driver with BFG480W

Philips Semiconductors
1880 MHz PA Driver with BFG480W
1880 MHz PA Driver with BFG480W
Application Note
JL-9902v0
Author
Jarek Lucek
June 1, 1999
Discrete Semiconductors - Mansfield
171 Forbes Blvd.
Mansfield, MA 02048
Abstract
th
BFG480W, the new 5 generation transistor from Philips Semiconductors, is well suited for PA driver applications
in AMPS, TDMA, CDMA and GSM systems. BFG80W’s performance is superior at 1880 MHz, 3.6V applications.
Under CW mode, the part is capable of P1dB=20dBm, efficiency of over 40% and typical Gp of 15 dB. BFG480W
delivers 20 dBm of linear output power under TDMA with a typical Gp of 15 dB and efficiency of above 30%.
Under CDMA mode, BFG480W delivers 19 dBm of linear output power with a typical Gp of above 15 dB and
efficiency of 30%.
Philips Semiconductors
1880 MHz PA Driver with BFG480W
INTRODUCTION
BFG480W is Philips Semiconductors’ 5th generation silicon bipolar RF wideband transistor in a
SOT343R plastic SMD package. The transistor delivers superior performance at frequencies below 3
GHz. It is manufactured according to the double poly process and characterised by a high transition
frequency (fT > 20 GHz) at low sub 3 Volt supply voltages. This application notes describes BFG480W
performance at 1880 MHz operation under CW, 2 Tone, TDMA and CDMA conditions.
PERFORMANCE OVERVIEW
The table below summarises BFG480W’s typical performance capabilities under different signal
conditions.
System
CW
2Tone
TDMA
CDMA
Table 1:
*-
Vsupply
3.0 Volts
3.6 Volts
3.0 Volts
3.6 Volts
3.0 Volts
3.6 Volts
3.0 Volts
3.6 Volts
P1dB or Plinear*
dBm
Gain**
dB
Efficiency***
%
Icq=10mA
Icq=20mA
Icq=10mA
Icq=20mA
Icq=10mA
Icq=20mA
19
21
16
17.5
19
20.5
17.5
19
20
21
15.5
16.5
19
20
17.5
18.5
14.5
14.9
15
16
14.5
15
15
15.5
14.7
14.8
15.5
16
15
14.7
15.5
16
37
38
27
27
35
33
30
30
37
36
24
22
34
33
30
27
BFG480W 1880 MHz PA driver performance summary
CW - load power @ P1dB
2Tone - load power represents linear average power @ IMD levels reaching –28dBc.
TDMA - load power represents linear average power @ ACPR levels reaching –26dBc or ALT levels reaching –45dBc.
CDMA load power represents linear average power @ ACPR levels reaching –44dBc with 1.25MHz channel offset, 1.25MHz channel
bandwidth and 30KHz Adjacent Channel bandwidth
** - typical Gain at P1dB for CW or Plinear for 2Tone, TDMA, CDMA signals
*** - typical Efficiency at P1dB for CW or Plinear for 2Tone, TDMA, CDMA signals.
2
Philips Semiconductors
1880 MHz PA Driver with BFG480W
CIRCUIT DESCRIPTION
Figure 1 shows a circuit diagram for the 1880 MHz PA driver using the BFG480W. Appendix 1 includes the part
list of the demo board.
BFG480W, 1880 MHz demoboard
VBB
C8*
10uF
R1
100ohm
Vs
R2
5.1ohm
R4
11ohm
R3
30ohm
C6
13pF
C7
1nF
PMBT3904
C3
13pF
OUTPUT
INPUT
VB
C1
24pF
BFG480W
C5
24pF
C4
1.3pF
C2
3.0pF
C8 - external to the demoboard
Figure 1: BFG480W common emitter demoboard for class-AB operation at 1880 MHz.
3
Philips Semiconductors
1880 MHz PA Driver with BFG480W
BOARD LAYOUT
Figure 3 shows the layout of the PCB, which has the following properties:
type: double copper-clad PTFE fiber-glass (backside ground)
h = 0.64 mm
t = 35 µm (Cu cladding, not coated)
εr = 6.15
tanδ = 0.0019
Vbase bias Vbb
R3
Vsupply Vs
R1
R4
Q1
C7
R2
C3
C6
50 Ω INPUT
50 Ω OUTPUT
C1
C2
C4
C5
T1 - BFG480W
Figure 3: Layout of the 1880 MHz BFG480W PA driver.
Appendix 1 contains the part list for the demo board. The position of C2 and C4 components is critical. The
artwork file is available on a floppy disc (DXF or Gerber format). Appendix 2 contains Spice model for BFG480W.
4
Philips Semiconductors
1880 MHz PA Driver with BFG480W
PERFORMANCE
BFG480W was evaluated under 4 different modes of operation. Each mode of operation is
summarised below. All measurements were taken with 100% duty cycle signal.
CW
BFG480W under CW at 1880 MHz and 25 deg. C
Vc=3.6V, Icq=1mA, Vbb=0.9V
Pin
Pout
Pout
dBm
dBm
mWatt
-5.2
5
3.16
-2.3
10
10.00
1.1
15
31.62
5.64
20
100.00
7.1
21
125.89
8.9
22
158.49
10.9
23
199.53
13.28
24
251.19
16.3
25
316.23
Gain
dB
10.2
12.3
13.9
14.36
13.9
13.1
12.1
10.72
8.7
It
mA
13
22
39
73
86
103
126
150
184
Eff
%
6.76
12.63
22.52
38.05
40.66
42.74
43.99
46.52
47.74
Vc=3.6V, Icq=5mA, Vbb=1.04V
Pin
Pout
Pout
dBm
dBm
mWatt
-8.5
5
3.16
-4.5
10
10.00
-0.3
15
31.62
4.7
20
100.00
6.45
21
125.89
8.35
22
158.49
10.47
23
199.53
12.9
24
251.19
16
25
316.23
Gain
dB
13.5
14.5
15.3
15.3
14.55
13.65
12.53
11.1
9
It
mA
16
26
43
78
91
109
132
160
193
Eff
%
5.49
10.68
20.43
35.61
38.43
40.39
41.99
43.61
45.51
Vc=3.6V, Icq=10mA, Vbb=1.11V
Pin
Pout
Pout
dBm
dBm
mWatt
-9.9
5
3.16
-5.4
10
10.00
-0.9
15
31.62
4.5
20
100.00
6.1
21
125.89
8.2
22
158.49
10.4
23
199.53
12.8
24
251.19
15.7
25
316.23
Gain
dB
14.9
15.4
15.9
15.5
14.9
13.8
12.6
11.2
9.3
It
mA
20
28
46
80
94
113
136
164
198
Eff
%
4.39
9.92
19.10
34.72
37.20
38.96
40.75
42.55
44.36
Vc=3.6V, Icq=20mA, Vbb=1.16V
Pin
Pout
Pout
dBm
dBm
mWatt
-10.9
5
3.16
-6.1
10
10.00
-1.34
15
31.62
4.27
20
100.00
6.2
21
125.89
8.1
22
158.49
10.4
23
199.53
12.8
24
251.19
16.1
25
316.23
Gain
dB
15.9
16.1
16.34
15.73
14.8
13.9
12.6
11.2
8.9
It
mA
27
34
49
83
98
116
135
167
206
Eff
%
3.25
8.17
17.93
33.47
35.68
37.95
41.05
41.78
42.64
It=Ic+Ib, total current draw.
5
Vc=3V, Icq=1mA,Vb=0.9V
Pin
Pout
Pout
dBm
dBm
mWatt
-4.9
5
3.16
-2
10
10.00
1.46
15
31.62
6.74
20
100.00
8.4
21
125.89
10.4
22
158.49
12.95
23
199.53
17.3
24
251.19
Gain
dB
9.9
12
13.54
13.26
12.6
11.6
10.05
6.7
It
mA
13
22
39
78
93
113
137
176
Eff
%
8.11
15.15
27.03
42.74
45.12
46.75
48.55
47.57
Vc=3V, Icq=5mA,Vb=1.05V
Pin
Pout
Pout
dBm
dBm
mWatt
-8.1
5
3.16
-4.1
10
10.00
0.1
15
31.62
6
20
100.00
7.8
21
125.89
10
22
158.49
12.6
23
199.53
17.2
24
251.19
Gain
dB
13.1
14.1
14.9
14
13.2
12
10.4
6.8
It
mA
16
25
43
82
97
118
145
186
Eff
%
6.59
13.33
24.51
40.65
43.26
44.77
45.87
45.02
Vc=3V, Icq=10mA, Vb=1.1V
Pin
Pout
Pout
dBm
dBm
mWatt
-9.5
5
3.16
-5
10
10.00
-0.4
15
31.62
5.8
20
100.00
7.8
21
125.89
9.9
22
158.49
12.5
23
199.53
17.1
24
251.19
Gain
dB
14.5
15
15.4
14.2
13.2
12.1
10.5
6.9
Ic
mA
19
27
44
84
102
121
148
190
Eff
%
5.55
12.35
23.96
39.68
41.14
43.66
44.94
44.07
Vc=3V, Icq=20mA, Vb=1.18V
Pin
Pout
Pout
dBm
dBm
mWatt
-11.2
5
3.16
-6.2
10
10.00
-1.3
15
31.62
5.3
20
100.00
7.3
21
125.89
9.6
22
158.49
12.33
23
199.53
17.5
24
251.19
Gain
dB
16.2
16.2
16.3
14.7
13.7
12.4
10.67
6.5
It
mA
26
34
49
88
103
125
151
197
Eff
%
4.05
9.80
21.51
37.88
40.74
42.26
44.05
42.50
Philips Semiconductors
1880 MHz PA Driver with BFG480W
CW
Efficiency vs. Pout, BFG480W CW @ 3.6V
50.00
45.00
40.00
35.00
Efficiency (%)
Gain (dB)
Gain vs. Pout, BFG480W CW @ 3.6V
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
30.00
25.00
20.00
15.00
10.00
5.00
0.00
5
7
9
11
13
15
17
19
21
23
25
5
7
9
11
13
Pout (dBm)
Icq=1mA
Icq=5mA
Icq=10mA
Icq=20mA
Icq=1mA
Gain vs. Pout, BFG480W CW @ 3.0V
50.00
15
14
13
12
45.00
21
23
25
Icq=5mA
Icq=10mA
Icq=20mA
35.00
Efficiency (%)
Gain (dB)
19
40.00
11
10
9
8
7
6
30.00
25.00
20.00
15.00
10.00
3
2
1
5.00
0
0.00
5
7
9
11
13
15
17
19
21
23
25
5
7
9
11
13
Pout (dBm)
Icq=1mA
Icq=5mA
15
17
19
21
23
25
Pout (dBm)
Icq=10mA
Icq=20mA
Icq=1mA
Gain vs. Pout, BFG480W CW @ 3.0V and 3.6V
17
Icq=5mA
Icq=10mA
Icq=20mA
Efficiency vs. Pout, BFG480W CW @ 3.6V
50.00
16
15
14
45.00
40.00
13
12
11
10
35.00
Efficiency (%)
Gain (dB)
17
Efficiency vs. Pout, BFG480W CW @ 3.0V
17
16
5
4
9
8
7
6
5
30.00
25.00
20.00
15.00
4
3
10.00
2
1
0
5.00
0.00
5
7
9
11
13
15
17
19
Pout (dBm)
Icq=10mA @ 3.6V
6
15
Pout (dBm)
21
23
25
5
7
9
11
13
15
17
19
21
Pout (dBm)
Icq=10mA, 3V
Icq=10mA @ 3.6V
Icq=10mA @ 3.0V
23
25
Philips Semiconductors
1880 MHz PA Driver with BFG480W
2 TONE
BFG480W under 2Tone at 1880 and 1881 MHz and 25 deg. C
Vc=3.6V, Icq=10mA, Vbb=1.1V
Pin
Pout
Pout
dBm
dBm
mWatt
-10
5
3.16
-5.5
10
10.00
-0.8
15
31.62
1.4
17
50.12
2.9
18
63.10
4.7
19
79.43
6.5
20
100.00
Gain
dB
15
15.5
15.8
15.6
15.1
14.3
13.5
3rd low
dBc
-40
-38
-37
-30
-25
-20.7
-18
3rd high
dBc
-45
-42
-38
-30
-25
-20.6
-19
5th low
dBc
-55
-49
-44
-39
-35
-27
-23
5th high
dBc
-57
-54
-51
-50
-36
-29
-25
It
mA
19
27
43
53
60
72
87
Eff
%
4.62
10.29
20.43
26.27
29.21
30.65
31.93
Vc=3.6V, Icq=20mA, Vbb=1.16V
Pin
Pout
Pout
dBm
dBm
mWatt
-11.2
5
3.16
-6.3
10
10.00
-1.3
15
31.62
0.9
17
50.12
2.4
18
63.10
4
19
79.43
6
20
100.00
Gain
dB
16.2
16.3
16.3
16.1
15.6
15
14
3rd low
dBc
-46
-38
-32
-27
-24
-19
-17
3rd high
dBc
-50
-45
-40
-30
-25
-21
-19
5th low
dBc
-57
-57
-52
-51
-41
-30
-25
5th high
dBc
-57
-57
-47
-43
-45
-34
-28
It
mA
27
34
48
58
64
74
89
Eff
%
3.25
8.17
18.30
24.00
27.39
29.82
31.21
Vc=3.0V, Icq=10mA, Vbb=1.1V
Pin
Pout
Pout
dBm
dBm
mWatt
-9.8
5
3.16
-5.2
10
10.00
-0.3
15
31.62
2.3
17
50.12
4.1
18
63.10
6.3
19
79.43
9.1
20
100.00
Gain
dB
14.8
15.2
15.3
14.7
13.9
12.7
10.9
3rd low
dBc
-40.9
-38
-34
-24
-20
-17
-15
3rd high
dBc
-44
-40
-31
-23
-20
-18
-14
5th low
dBc
-55
-49
-42
-32
-26
-22
-19
5th high
dBc
-56
-57
-50
-34
-27
-23
-20
It
mA
19
27
43
54
63
77
94
Eff
%
5.55
12.35
24.51
30.94
33.38
34.39
35.46
Vc=3.0V, Icq=20mA, Vbb=1.17V
Pin
Pout
Pout
dBm
dBm
mWatt
-11
5
3.16
-6.1
10
10.00
-1
15
31.62
1.6
17
50.12
3.4
18
63.10
5.4
19
79.43
8.2
20
100.00
Gain
dB
16
16.1
16
15.4
14.6
13.6
11.8
3rd low
dBc
-44
-37
-30.2
-24
-20.3
-17
-15
3rd high
dBc
-52
-47
-35
-25
-21.4
-18
-15
5th low
dBc
-55
-56
-48
-38
-29
-23
-19
5th high
dBc
-55
-56
-46
-46
-33
-26
-21
It
mA
27
33
47
58
67
79
95
Eff
%
3.90
10.10
22.43
28.80
31.39
33.52
35.09
It=Ic+Ib, total current draw.
7
Philips Semiconductors
1880 MHz PA Driver with BFG480W
2 TONE
Gain vs. Pout, BFG480W 2 Tone @ 3.6V
Efficiency vs. Pout, BFG480W 2 Tone @ 3.6V
35.00
17
30.00
16
25.00
Efficiency (%)
Gain (dB)
15
14
13
12
20.00
15.00
10.00
11
5.00
10
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0.00
Avg. 2T Pout (dBm)
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
18
19
20
Avg. 2T Pout (dBm)
Icq=20mA
Icq=10mA
Icq=10mA
Efficiency vs. Pout, BFG480W 2 Tone @ 3.0V
17
35.00
16
30.00
15
25.00
Efficiency (%)
Gain (dB)
Gain vs. Pout, BFG480W 2 Tone @ 3.0V
14
13
20.00
15.00
12
10.00
11
5.00
10
0.00
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
5
6
7
8
9
10
Avg. 2T Pout (dBm)
Icq=10mA
Icq=20mA
7
8
9
10
11
12
13
14
15
16
17
18
13
14
15
16
17
20
5
-15
-20
-20
-25
-25
-30
-30
-35
-40
Icq=20mA
Linearity vs. Pout, BFG480W 2 Tone @ 3.0V, 20mA
19
-15
6
7
8
9
10
11
12
13
14
15
16
17
-35
-40
-45
-45
-50
-50
-55
-55
-60
-60
Avg. 2T Pout (dBm)
3rd high
8
12
Icq=10mA
IMD (dBc)
IMD (dBc)
6
11
Avg. 2T Pout (dBm)
Linearity vs. Pout, BFG480W 2 Tone @ 3.6V, 20mA
5
Icq=20mA
3rd low
5th low
Avg. 2T Pout (dBm)
5th high
3rd high
3rd low
5th low
5th high
18
19
20
Philips Semiconductors
1880 MHz PA Driver with BFG480W
TDMA
BFG480W under TDMA at 1880 MHz and 25 deg. C
Vc=3.6V, Icq=10mA, Vbb=1.1V
Pin
Pout
Pout
dBm
dBm
mWatt
-10
5
3.16
-5.6
10
10.00
-1
15
31.62
1
17
50.12
3.2
19
79.43
4.8
20
100.00
6.5
21
125.89
8.6
22
158.49
Gain
dB
15
15.6
16
16
15.8
15.2
14.5
13.4
ACPR low
dB
-36
-36
-36
-36
-31
-28
-25.5
-24
ACPR high
dB
-35
-35
-36
-34
-31
-28.5
-25
-24
1st ALT low
dB
-65
-65
-61
-58
-51
-53
-47
-41
1st ALT high
dB
-65
-66
-62
-59
-52
-53
-47
-41
2nd ALT low
dB
-66
-69
-66
-67
-64
-59
-57
-56
2nd ALT high
dB
-66
-69
-66
-67
-64
-59
-58
-56
It
mA
19
27
44
54
72
82
96
114
Eff
%
4.62
10.29
19.96
25.78
30.65
33.88
36.43
38.62
Vc=3.6V, Icq=20mA, Vbb=1.16V
Pin
Pout
Pout
dBm
dBm
mWatt
-11.2
5
3.16
-6.2
10
10.00
-1.3
15
31.62
0.72
17
50.12
3.1
19
79.43
4.7
20
100.00
6.5
21
125.89
8.5
22
158.49
Gain
dB
16.2
16.2
16.3
16.28
15.9
15.3
14.5
13.5
ACPR low
dB
-35.4
-36
-35
-36
-30
-26.5
-25
-24
ACPR high
dB
-36
-36
-36
-36
-30
-26
-25
-24
1st ALT low
dB
-66
-68
-62
-59
-53
-52
-46
-40
1st ALT high
dB
-66
-68
-62
-59
-53
-52
-46
-40
2nd ALT low
dB
-67
-70
-65
-67
-64
-58
-58
-55
2nd ALT high
dB
-66
-70
-65
-67
-64
-58
-58
-56
It
mA
26
33
47
58
73
84
98
116
Eff
%
3.38
8.42
18.69
24.00
30.23
33.07
35.68
37.95
Vc=3.0V, Icq=10mA, Vbb=1.11V
Pin
Pout
Pout
dBm
dBm
mWatt
-9.7
5
3.16
-5.2
10
10.00
-0.5
15
31.62
1.6
17
50.12
4.4
19
79.43
6.1
20
100.00
8.2
21
125.89
10.6
22
158.49
Gain
dB
14.7
15.2
15.5
15.4
14.6
13.9
12.8
11.4
ACPR low
dB
-35
-36
-36
-33
-27
-25
-24
-22
ACPR high
dB
-35
-36
-35
-33
-27
-25
-23
-22
1st ALT low
dB
-65
-65
-58
-52
-51
-45
-40
-38
1st ALT high
dB
-65
-65
-60
-52
-51
-45
-40
-38
2nd ALT low
dB
-67
-70
-66
-66
-58
-56
-55
-50
2nd ALT high
dB
-67
-70
-66
-66
-58
-56
-55
-50
It
mA
19
27
43
55
73
86
102
124
Eff
%
5.55
12.35
24.51
30.37
36.27
38.76
41.14
42.60
Vc=3.0V, Icq=20mA, Vbb=1.17V
Pin
Pout
Pout
dBm
dBm
mWatt
-11
5
3.16
-6.2
10
10.00
-1
15
31.62
1.2
17
50.12
4.1
19
79.43
6
20
100.00
8.2
21
125.89
10.6
22
158.49
Gain
dB
16
16.2
16
15.8
14.9
14
12.8
11.4
ACPR low
dB
-36
-36
-34
-33
-27
-25
-23
-23
ACPR high
dB
-36
-36
-35
-33
-27
-25
-23
-23
1st ALT low
dB
-64
-68
-62
-54
-52
-45
-40
-38
1st ALT high
dB
-65
-68
-62
-54
-52
-44
-40
-38
2nd ALT low
dB
-65
-70
-65
-66
-59
-58
-55
-50
2nd ALT high
dB
-65
-70
-65
-66
-59
-58
-55
-50
It
mA
26
33
48
59
76
89
106
127
Eff
%
4.05
10.10
21.96
28.32
34.84
37.45
39.59
41.60
It=Ic+Ib, total current draw.
9
Philips Semiconductors
1880 MHz PA Driver with BFG480W
TDMA
Gain vs. Pout, BFG480W TDMA @ 3.6V
Efficiency vs. Pout, BFG480W TDMA @ 3.6V
45.00
17
40.00
16
35.00
15
Efficiency (%)
14
Gain (dB)
13
12
11
10
9
30.00
25.00
20.00
15.00
8
10.00
7
6
5.00
5
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
0.00
22
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
20
21
22
20
21
Pout (dBm)
Pout (dBm)
Icq=20mA
Icq=10mA
Icq=10mA
Gain vs. Pout, BFG480W TDMA @ 3.0V
Icq=20mA
Efficiency vs. Pout, BFG480W TDMA @ 3.0V
17
45.00
16
40.00
15
35.00
14
Efficiency (%)
Gain (dB)
13
12
11
10
9
8
30.00
25.00
20.00
15.00
10.00
7
5.00
6
5
0.00
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
5
6
7
8
9
10
11
12
Pout (dBm)
Icq=10mA
Icq=20mA
7
8
9
10
11
12
13
14
15
16
17
18
19
21
22
5
-20
-20
-25
-25
-30
-35
-40
-45
-50
-55
-60
-65
-70
-75
6
7
8
9
16
17
18
19
Icq=20mA
10
11
12
13
14
15
16
17
18
19
-30
-35
-40
-45
-50
-55
-60
-65
-70
-75
Avg Pout (dBm)
10
15
Linearity vs. Pout, BFG480W TDMA @ 3.0V, 20mA
20
ACPR,1st and 2nd ALT (dB)
ACPR,1st and 2nd ALT (dB)
6
14
Icq=10mA
Linearity vs. Pout, BFG480W TDMA @ 3.6V, 20mA
5
13
Pout (dBm)
ACPR high
ACPR low
2nd ALT low
2nd ALT high
1st ALT low
Avg Pout (dBm)
1st ALT high
ACPR high
ACPR low
2nd ALT low
2nd ALT high
1st ALT low
1st ALT high
22
Philips Semiconductors
1880 MHz PA Driver with BFG480W
CDMA
BFG480W under CDMA at 1.88GHz and 25 deg. C
Vc=3.6V, Icq=10mA, Vbb=1.07V
Pin
Pout
Pout
dBm
dBm
mWatt
-10.1
5
3.16
-5.6
10
10.00
-1
15
31.62
1
17
50.12
2.2
18
63.10
3.4
19
79.43
4.9
20
100.00
Gain
dB
15.1
15.6
16
16
15.8
15.6
15.1
ACPR low
dB
-64
-62
-59
-51
-47
-44
-42
ACPR high
dB
-70
-69
-61
-51
-47
-44
-42
It
mA
20
28
44
55
62
70
81
Eff
%
4.39
9.92
19.96
25.31
28.27
31.52
34.29
Vc=3.6V, Icq=20mA, Vbb=1.15V
Pin
Pout
Pout
dBm
dBm
mWatt
-11.7
5
3.16
-6.8
10
10.00
-1.7
15
31.62
0.5
17
50.12
1.7
18
63.10
3.1
19
79.43
4.6
20
100.00
Gain
dB
16.7
16.8
16.7
16.5
16.3
15.9
15.4
ACPR low
dB
-70
-61
-54
-49
-46
-43
-41
ACPR high
dB
-74
-66
-59
-52
-48
-44
-41
It
mA
34
39
52
62
68
76
86
Eff
%
2.58
7.12
16.89
22.45
25.77
29.03
32.30
Vc=3.0V, Icq=10mA, Vbb=1.11V
Pin
Pout
Pout
dBm
dBm
mWatt
-9.7
5
3.16
-5.2
10
10.00
-0.5
15
31.62
1.7
17
50.12
3
18
63.10
4.5
19
79.43
6.3
20
100.00
Gain
dB
14.7
15.2
15.5
15.3
15
14.5
13.7
ACPR low
dB
-62
-62
-55
-46
-43
-41
-39
ACPR high
dB
-64
-60
-53
-46
-43
-41
-39
It
mA
19
27
43
55
62
72
86
Eff
%
5.55
12.35
24.51
30.37
33.92
36.77
38.76
Vc=3.0V, Icq=20mA, Vbb=1.17V
Pin
Pout
Pout
dBm
dBm
mWatt
-11.8
5
3.16
-6.1
10
10.00
-1.1
15
31.62
1.26
17
50.12
2.6
18
63.10
4.1
19
79.43
6
20
100.00
Gain
dB
16.8
16.1
16.1
15.74
15.4
14.9
14
ACPR low
dB
-67
-59
-52
-46
-43
-41
-39
ACPR high
dB
-73
-68
-55
-45
-43
-40.8
-39
It
mA
27
34
48
58
67
76
89
Eff
%
3.90
9.80
21.96
28.80
31.39
34.84
37.45
It=Ic+Ib, total current draw.
11
Philips Semiconductors
1880 MHz PA Driver with BFG480W
CDMA
Gain vs. Pout, BFG480W CDMA @ 3.6V
Efficiency vs. Pout, BFG480W CDMA @ 3.6V
40.00
17
35.00
16.5
16
15.5
30.00
Efficiency (%)
15
Gain (dB)
14.5
14
13.5
13
12.5
12
25.00
20.00
15.00
10.00
11.5
11
5.00
10.5
10
4
6
8
10
12
14
16
18
0.00
20
4
6
8
10
12
14
16
18
20
18
20
Pout (dBm)
Pout (dBm)
Icq=10mA
Icq=20mA
Icq=10mA
Gain vs. Pout, BFG480W CDMA @ 3.0V
Icq=20mA
Efficiency vs. Pout, BFG480W CDMA @ 3.0V
17
40.00
16.5
35.00
16
15.5
30.00
15
Efficiency (%)
Gain (dB)
14.5
14
13.5
13
12.5
25.00
20.00
15.00
12
10.00
11.5
11
5.00
10.5
10
0.00
4
6
8
10
12
14
16
18
20
4
6
8
10
Pout (dBm)
Icq=10mA
Icq=20mA
Icq=10mA
Linearity vs. Pout, BFG480W CDMA @ 3.6V, 20mA
4
6
8
10
12
14
12
14
16
18
Icq=20mA
Linearity vs. Pout, BFG480W CDMA @ 3.0V, 20mA
20
4
-35
-35
-40
-40
-45
6
8
10
12
14
-45
ACPR (dBc)
ACPR (dBc)
-50
-55
-60
-50
-55
-60
-65
-65
-70
-70
-75
-80
-75
Avg Pout (dBm)
ACPR high
12
16
Pout (dBm)
ACPR low
Avg Pout (dBm)
ACPR high
ACPR low
16
18
20
Philips Semiconductors
APPENDIX 1:
Part list for BFG480W 1880 MHz PA driver
Resistors
R1
100 Ω
Leaded wirewound, 0.1W.
R2
5.1 Ω
Philips 0805, 0.1W metal film resistor.
R3
30 Ω
Philips 0805, 0.1W metal film resistor.
R4
11 Ω
Philips 0805, 0.1W metal film resistor.
Capacitors
C1,C5
24 pF
ATC100A, DC blocking capacitor
C2
3.0 pF
ATC100A, matching capacitor
C3,C6
13 pF
C4
1.3 pF
ATC100A, bias and supply decoupling
capacitor.
ATC100A, matching capacitor
C7
1.0 nF
C8
10 µF
Philips 0805, supply low frequency
decoupling capacitor.
Philips electrolytic low frequency
decoupling capacitor – not part of the
demoboard.
Transistors
T1
BFG480W
RF amplifying transistor.
Q1
PMBT3904
Biasing and thermal tracking small
signal transistor.
13
1880 MHz PA Driver with BFG480W
Philips Semiconductors
1880 MHz PA Driver with BFG480W
APPENDIX 2:
BFG480W Spice and package model
(preliminary)
10
12
L=Lcfoot
C=Ccfoot
7
L=Lclead
C=Cbc
4
L=Lcbond
1
8
11
L=Lbfoot
5
L=Lblead
C=Cbfoot
2
REGION=
L=Lbbond
C=Cbe
AREA=
REGION=
MODEL=BFG480W_die
C=Cbpb
C=Cmet
TEMP=
MODEL=D1
AREA=
C=Cbpc
C=Cce
14
13
3
12
R=Rsub1
R=Rmut
R=Rs
R=Rsub2
15
L=Lebond
6
L=Lelead
9
L=Lefoot
12
C=Cefoot
12
This model is valid from 540MHz to 6GHz. The reference plane has been put at the test substrate for the package
(SOT343R). In the next page you can see the test substrate definition. If you want to use this model without the footprint,
just use the model at the node points 7,8, and 9.
14
Philips Semiconductors
1880 MHz PA Driver with BFG480W
Spice parameters of the BFG480W
param Lbbond " 709.0p"
param Lblead " 281.0p"
param Lbfoot " 55.00p"
param Cbfoot " 58.50f"
param Lebond " 57.13p"
param Lelead " 69.14p"
param Lefoot " 173.9p"
param Cefoot " 195.0f"
param Lcbond " 559.3p"
param Lclead " 280.0p"
param Lcfoot " 55.00p"
param Ccfoot " 58.50f"
param Cbc " 2.000f"
param Cbe " 80.00f"
param Cce " 80.00f"
param Cbpb " 330.0f"
param Cbpc " 347.0f"
param Cmet " 883.7f"
param Rsub1 " 214.7 "
param Rsub2 " 321.4 "
param Rsub3 " 1.000MEG"
param Rmut " 98.84 "
param Rs " 217.5u"
param D1.IS " 976.6f"
param D1.N " 1.272 "
param Q1.AREA " 1.000 "
param NPN.IS " 176.9a"
param NPN.BF " 136.5 "
param NPN.NF " 986.3m"
param NPN.VAF " 23.00 "
param NPN.IKF " 5.900 "
param NPN.ISE " 1.189p"
param NPN.NE " 2.817 "
15
param NPN.BR " 9.000 "
param NPN.NR " 996.8m"
param NPN.VAR " 1.750 "
param NPN.IKR " 558.5m"
param NPN.ISC " 20.66f"
param NPN.NC " 1.916 "
param NPN.RB " 2.985 "
param NPN.IRB " 0.000 "
param NPN.RBM " 640.5m"
param NPN.RE " 114.5m"
param NPN.RC " 967.0m"
param NPN.CJE " 1.643p"
param NPN.VJE " 900.0m"
param NPN.MJE " 267.4m"
param NPN.CJC " 545.2f"
param NPN.VJC " 504.2m"
param NPN.MJC " 254.1m"
param NPN.CJS " 917.8f"
param NPN.VJS " 421.8m"
param NPN.MJS " 57.54m"
param NPN.XCJC " 500.0m"
param NPN.TR " 150.0p"
param NPN.TF " 3.680p"
param NPN.XTF " 1.000K"
param NPN.VTF " 652.5m"
param NPN.ITF " 11.13 "
param NPN.PTF " 0.000 "
param NPN.FC " 910.0m"
param NPN.EG " 1.110 "
param NPN.XTI " 4.300 "
param NPN.XTB " 500.0m"
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