PHILIPS BLF404

DISCRETE SEMICONDUCTORS
DATA SHEET
M3D175
BLF404
UHF power MOS transistor
Product specification
Supersedes data of 1997 Oct 28
1998 Jan 29
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
FEATURES
PINNING
• High power gain
PIN
• Easy power control
1, 8
source
• Gold metallization
2, 3
gate
• Good thermal stability
4, 5
source
• Withstands full load mismatch
6, 7
drain
DESCRIPTION
• Designed for broadband operation.
APPLICATIONS
8
handbook, halfpage
5
• Communication transmitters in the VHF/UHF range with
a nominal supply voltage of 12.5 V.
DESCRIPTION
1
Silicon N-channel enhancement mode vertical D-MOS
power transistor in an 8-lead SOT409A SMD package with
a ceramic cap.
Top view
4
MBK150
Fig.1 Simplified outline SOT409A.
QUICK REFERENCE DATA
RF performance at Tmb ≤ 60 °C in a common source test circuit.
MODE OF OPERATION
CW class-AB
f
(MHz)
VDS
(V)
PL
(W)
Gp
(dB)
ηD
(%)
500
12.5
4
≥10
≥50
CAUTION
This product is supplied in anti-static packing to prevent damage caused by electrostatic discharge during transport
and handling. For further information, refer to Philips specs.: SNW-EQ-608, SNW-FQ-302A, and SNW-FQ-302B.
1998 Jan 29
2
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
VDS
drain-source voltage
−
40
V
VGS
gate-source voltage
−
±20
V
ID
DC drain current
−
1.5
A
Ptot
total power dissipation
−
8.3
W
Tstg
storage temperature
Tmb ≤ 85 °C
−65
150
°C
Tj
junction temperature
−
200
°C
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
thermal resistance from junction to mounting base
Rth j-mb
MGM522
10
handbook, halfpage
ID
(A)
1
(1)
(2)
10−1
1
10
VDS (V)
102
(1) Current in this area may be limited by RDSon.
(2) Tmb = 85 °C.
Fig.2 DC SOAR.
1998 Jan 29
3
Tmb ≤ 85 °C, Ptot = 8.3 W
VALUE
UNIT
12.1
K/W
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
CHARACTERISTICS
Tj = 25 °C unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
−
40
MAX.
−
UNIT
V(BR)DSS
drain-source breakdown voltage VGS = 0; ID = 5 mA
V
VGS(th)
gate-source threshold voltage
ID = 50 mA; VDS = 10 V
2
−
4.5
V
IDSS
drain-source leakage current
VGS = 0; VDS = 12.5 V
−
−
0.5
mA
IGSS
gate-source leakage current
VDS = 0; VGS = ±20 V
−
−
1
µA
VGS = 15 V; VDS = 10 V
IDSX
on-state drain current
−
2.3
−
A
RDSon
drain-source on-state resistance ID = 0.7 A; VGS = 15 V
−
1.8
2.7
Ω
gfs
forward transconductance
ID = 0.7 A; VDS = 10 V
200
270
−
mS
Cis
input capacitance
VGS = 0; VDS = 12.5 V; f = 1 MHz
−
14
−
pF
Cos
output capacitance
VGS = 0; VDS = 12.5 V; f = 1 MHz
−
17
−
pF
Crs
feedback capacitance
VGS = 0; VDS = 12.5 V; f = 1 MHz
−
3
−
pF
MRA254
25
handbook, halfpage
T.C.
(mV/K)
ID
(A)
15
2
5
1
−5
10
MRA249
3
handbook, halfpage
102
103
0
104
0
4
ID(mA)
8
12
16
20
VGS (V)
VDS = 10 V.
VDS = 10 V; Tj = 25 °C.
Fig.3
Temperature coefficient of gate-source
voltage as a function of drain current;
typical values.
1998 Jan 29
Fig.4
4
Drain current as a function of gate-source
voltage; typical values.
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
MRA246
MRA253
5
50
handbook, halfpage
handbook, halfpage
RDSon
(Ω)
C
(pF)
4
40
3
30
2
20
1
10
0
0
50
100
Tj (oC)
0
150
Cos
Cis
0
4
8
12
16
VDS (V)
ID = 0.7 A; VGS = 15 V.
VGS = 0; f = 1 MHz; Tj = 25 °C.
Fig.5
Drain-source on-state resistance as a
function of junction temperature;
typical values.
Fig.6
MRA256
10
Crs
(pF)
handbook, halfpage
8
6
4
2
0
0
4
8
12
VDS (V)
16
VGS = 0; f = 1 MHz; Tj = 25 °C.
Fig.7
Feedback capacitance as a function of
drain-source voltage; typical values.
1998 Jan 29
5
Input and output capacitance as functions
of drain-source voltage; typical values.
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
APPLICATION INFORMATION
RF performance at Tmb ≤ 60 °C in a common source test circuit with the device soldered on a printed-circuit board with
through metallized holes.
MODE OF OPERATION
CW, class-AB
f
(MHz)
VDS
(V)
IDQ
(A)
PL
(W)
Gp
(dB)
ηD
(%)
500
12.5
50
4
≥10
≥50
typ. 11.5
typ. 55
Ruggedness in class-AB operation
The BLF404 is capable of withstanding a load mismatch corresponding to VSWR = 10 : 1 through all phases under the
following conditions: f = 500 MHz; VDS = 12.5 V; PL = 4 W; Tmb ≤ 60 °C.
MGM520
20
Gp
(dB)
handbook, halfpage
(%)
16
PL
(W)
80
4
ηD
12
MGM521
6
100
ηD
handbook, halfpage
60
Gp
40
8
2
20
4
0
0
0
2
4
PL (W)
0
0
6
CW, class-AB operation; f = 500 MHz; VDS = 12.5 V;
IDQ = 50 mA; Tmb ≤ 60 °C.
Fig.8
400
PD (mW)
600
CW, class-AB operation; f = 500 MHz; VDS = 12.5 V;
IDQ = 50 mA; Tmb ≤ 60 °C.
Power gain and drain efficiency as
functions of load power; typical values.
1998 Jan 29
200
Fig.9
6
Load power as a function of drive power;
typical values.
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
Test circuit information
+VD
handbook, full pagewidth
R3
R1
R4
R2
L1
C1
R6
C3
L2
C2
R5
C10
L8
input
50 Ω
C5
L10
L6
L3
L7
DUT
C6
C7
C9
output
50 Ω
C12
C13
MGM523
C8
Fig.10 Class-AB common source test circuit at f = 500 MHz.
1998 Jan 29
L11
C11
L5
C4
L4
L9
7
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
List of components used in test circuit (see Figs 10 and 11).
COMPONENT
DESCRIPTION
VALUE
DIMENSIONS
C1
electrolytic capacitor
4.7 µF, 10 V
C2, C3
multilayer ceramic chip capacitor
47 nF
C4
multilayer ceramic chip capacitor; note 1
18 pF
C5, C10
multilayer ceramic chip capacitor; note 1
180 pF
C6, C11
multilayer ceramic chip capacitor; note 1
270 pF
C7
multilayer ceramic chip capacitor; note 1
22 pF
C8
multilayer ceramic chip capacitor; note 1
8.2 pF
C9
multilayer ceramic chip capacitor; note 1
2.7 pF
C12
multilayer ceramic chip capacitor; note 1
1.2 pF
C13
multilayer ceramic chip capacitor; note 1
12 pF
L1
2 turns 1 mm enamelled copper wire
on a grade 4B1 Ferroxcube core
ext. dia. = 4.2 mm
int. dia. = 2 mm
length = 6 mm
L2
3 turns 1 mm enamelled copper wire
int. dia. = 4.6 mm
leads = 2 x 5 mm
L3
bifilar coil
lead dia. = 0.8 mm
L4
bifilar coil
lead dia. = 1 mm
L5
stripline; note 2
50 Ω
8.8 × 2.38 mm
L6
stripline; note 2
50 Ω
5.8 × 2.38 mm
L7
stripline; note 2
50 Ω
6.8 × 2.38 mm
L8
stripline; note 2
50 Ω
3.76 × 2.38 mm
L9
stripline; note 2
50 Ω
5.8 × 2.38 mm
L10
stripline; note 2
50 Ω
4.48 × 2.38 mm
L11
stripline; note 2
50 Ω
3.13 × 2.38 mm
R1, R2
SMD resistor
3.9 kΩ
R3
metal film resistor
1 kΩ, 0.25 W
R4
metal film resistor
22 Ω, 0.25 W
R5
metal film resistor
10 kΩ, 0.25 W
R6
potentiometer
10 kΩ
CATALOGUE No.
Notes
1. American Technical Ceramics type 100A or capacitor of same quality.
2. The striplines are on a double copper-clad printed circuit board, with DUROID dielectric (εr = 2.2);
thickness 0.79 mm, thickness of the copper sheet 2 x 35 µm.
1998 Jan 29
8
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
56
handbook, full pagewidth
31
2
1
3
+VD
R6
R1
R2
C1
R3
L1
R4
C2
C3
R5
L2
L3
L5
L6
L7
C6
C4
C7
BLF404
C5
C8
C10
L4
L8
L9
L10
L11
C11
C9
C12 C13
MGM524
Dimensions in mm.
The components are situated on one side of the copper-clad printed-circuit board, the other side is unetched and serves as a ground plane.
Earth connections from the component side to the ground plane are made by through metallization.
Fig.11 Printed-circuit board and component layout for 500 MHz class-AB test circuit in Fig.10.
1998 Jan 29
9
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
MGM517
MGM518
0
8
handbook, halfpage
ri
(Ω)
16
handbook, halfpage
xi
(Ω)
xi
ZL
(Ω)
6
−20
12
4
−40
8
RL
−60
4
−80
600
0
2
XL
ri
0
0
200
400
f (MHz)
0
200
400
f (MHz)
600
CW, class-AB operation; VDS = 12.5 V; ID = 50 mA;
PL = 4 W; Tmb ≤ 60 °C.
CW, class-AB operation; VDS = 12.5 V; ID = 50 mA;
PL = 4 W; Tmb ≤ 60 °C.
Fig.12 Input impedance as a function of frequency
(series components); typical values.
Fig.13 Load impedance as a function of frequency
(series components); typical values.
MGM519
30
handbook, halfpage
Gp
(dB)
20
10
0
0
200
400
f (MHz)
600
CW, class-AB operation; VDS = 12.5 V; IDQ = 50 mA;
PL = 4 W; Tmb ≤ 60 °C.
Fig.14 Power gain as a function of frequency
(series components); typical values.
1998 Jan 29
10
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
MOUNTING RECOMMENDATIONS
Both the metallized groundplate and leads contribute to the heatflow. It is recommended that the transistor is mounted
on a grounded metallized area of a maximum thickness of 0.8 mm on the printed-circuit board, equipped with at least 12
(0.5 mm diameter) through metallized holes filled with solder.
A thermal resistance Rth(mb-h) of 5 K/W can be achieved if heatsink compound is applied when the transistor is mounted
on the printed-circuit board.
full pagewidth
1.87 (2×)
0.60 (4×)
0.80 (2×)
0.50 (12×)
7.38 3.60
1.00 (8×)
1.00 (9×)
4.60
MGK390
Dimensions in mm.
Fig.15 Reflow soldering footprint for SOT409A.
1998 Jan 29
11
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
PACKAGE OUTLINE
Ceramic surface mounted package; 8 leads
SOT409A
D
A
D2
B
c
w2 B
H1
8
5
L
E2
H
E
A
1
4
e
α
w1
b
Q1
0
2.5
5 mm
scale
DIMENSIONS (millimetre dimensions are derived from the original inch dimensions)
UNIT
A
b
c
D
D2
E
E2
e
H
H1
L
Q1
w1
w2
α
mm
2.36
2.06
0.58
0.43
0.23
0.18
5.94
5.03
5.16
5.00
4.93
4.01
4.14
3.99
1.27
7.47
7.26
4.39
4.24
1.02
0.51
0.10
0.00
0.25
0.25
7°
0°
inches
0.093
0.081
0.023
0.017
0.009
0.007
0.234
0.198
0.203
0.197
0.194
0.158
0.163
0.157
0.050
0.294
0.286
0.173
0.167
0.040
0.020
0.004
0.000
0.010
0.010
7°
0°
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
EIAJ
ISSUE DATE
98-01-27
SOT409A
1998 Jan 29
EUROPEAN
PROJECTION
12
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
DEFINITIONS
Data Sheet Status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1998 Jan 29
13
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
NOTES
1998 Jan 29
14
Philips Semiconductors
Product specification
UHF power MOS transistor
BLF404
NOTES
1998 Jan 29
15
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© Philips Electronics N.V. 1998
SCA57
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Printed in The Netherlands
125108/00/03/pp16
Date of release: 1998 Jan 29
Document order number:
9397 750 03239