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PDF IRFS4020PbF Data sheet ( Hoja de datos )

Número de pieza IRFS4020PbF
Descripción Digital Audio MOSFET
Fabricantes International Rectifier 
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PD - 97393
IRFS4020PbF
DIGITAL AUDIO MOSFET IRFSL4020PbF
Features
Key parameters optimized for Class-D audio
amplifier applications
Low RDSON for improved efficiency
Low QG and QSW for better THD and improved
efficiency
Low QRR for better THD and lower EMI
175°C operating junction temperature for
ruggedness
Can deliver up to 300W per channel into 8load in
Key Parameters
VDS
RDS(ON) typ. @ 10V
Qg typ.
Qsw typ.
200
85
18
6.7
RG(int) typ.
TJ max
3.2
175
D
D
D
V
m
nC
nC
°C
half-bridge configuration amplifier
G
DS
G
DS
G
S
D2Pak
IRFS4020PbF
TO-262
IRFSL4020PbF
GDS
Gate
Drain
Source
Description
This Digital Audio MOSFET is specifically designed for Class-D audio amplifier applications. This MOSFET utilizes
the latest processing techniques to achieve low on-resistance per silicon area. Furthermore, Gate charge, body-diode
reverse recovery and internal Gate resistance are optimized to improve key Class-D audio amplifier performance
factors such as efficiency, THD and EMI. Additional features of this MOSFET are 175°C operating junction
temperature and repetitive avalanche capability. These features combine to make this MOSFET a highly efficient,
robust and reliable device for ClassD audio amplifier applications.
Absolute Maximum Ratings
VDS
VGS
ID @ TC = 25°C
ID @ TC = 100°C
IDM
PD @TC = 25°C
PD @TC = 100°C
TJ
TSTG
Parameter
Drain-to-Source Voltage
Gate-to-Source Voltage
Continuous Drain Current, VGS @ 10V
cContinuous Drain Current, VGS @ 10V
Pulsed Drain Current
fPower Dissipation
fPower Dissipation
Linear Derating Factor
Operating Junction and
Storage Temperature Range
Soldering Temperature, for 10 seconds
(1.6mm from case)
Thermal Resistance
Parameter
fRθJC Junction-to-Case
fRθJA Junction-to-Ambient (PCB Mount)
Max.
200
±20
18
13
52
100
52
0.70
-55 to + 175
300
Typ.
–––
–––
Max.
1.43
40
Units
V
A
W
W/°C
°C
Units
°C/W
Notes  through … are on page 2
www.irf.com
1
05/14/09

1 page




IRFS4020PbF pdf
300
275 ID = 11A
250
225
200 TJ = 125°C
175
150
125
100 TJ = 25°C
75
50
5 6 7 8 9 10 11 12 13 14 15 16
VGS, Gate -to -Source Voltage (V)
Fig 12. On-Resistance vs. Gate Voltage
1000
100 Duty Cycle = Single Pulse
10 0.01
0.05
1 0.10
IRFS/SL4020PbF
400
ID
TOP 1.6A
2.4A
300 BOTTOM 11A
200
100
0
25 50 75 100 125 150 175
Starting TJ , Junction Temperature (°C)
Fig 13. Maximum Avalanche Energy vs. Drain Current
Allowed avalanche Current vs
avalanche pulsewidth, tav
assuming Tj = 25°C due to
avalanche losses
0.1
0.01
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
tav (sec)
Fig 14. Typical Avalanche Current Vs.Pulsewidth
1.0E-01
100
TOP
Single Pulse
BOTTOM 1.0% Duty Cycle
80 ID = 11A
60
40
20
0
25 50 75 100 125 150 175
Starting TJ , Junction Temperature (°C)
Fig 15. Maximum Avalanche Energy vs. Temperature
www.irf.com
Notes on Repetitive Avalanche Curves , Figures 14, 15:
(For further info, see AN-1005 at www.irf.com)
1. Avalanche failures assumption:
Purely a thermal phenomenon and failure occurs at a
temperature far in excess of Tjmax. This is validated for
every part type.
2. Safe operation in Avalanche is allowed as long asTjmax is
not exceeded.
3. Equation below based on circuit and waveforms shown in
Figures 17a, 17b.
4. PD (ave) = Average power dissipation per single
avalanche pulse.
5. BV = Rated breakdown voltage (1.3 factor accounts for
voltage increase during avalanche).
6. Iav = Allowable avalanche current.
7. T = Allowable rise in junction temperature, not to exceed
Tjmax (assumed as 25°C in Figure 14, 15).
tav = Average time in avalanche.
D = Duty cycle in avalanche = tav ·f
ZthJC(D, tav) = Transient thermal resistance, see figure 11)
PD (ave) = 1/2 ( 1.3·BV·Iav) = DT/ ZthJC
Iav = 2DT/ [1.3·BV·Zth]
EAS (AR) = PD (ave)·tav
5

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