IRLR3705Z International Rectifier, IRLR3705Z Datasheet - Page 7

• Manufacturer Part Number: IRLR3705Z
• Description: MOSFET N-CH 55V 42A DPAK
• Manufacturer: International Rectifier
• Series: HEXFET®r

Specifications of IRLR3705Z

• Fet Type: MOSFET N-Channel, Metal Oxide
• Fet Feature: Logic Level Gate
• Rds On (max) @ Id, Vgs: 8 mOhm @ 42A, 10V
• Drain To Source Voltage (vdss): 55V
• Current - Continuous Drain (id) @ 25° C: 42A
• Vgs(th) (max) @ Id: 3V @ 250µA
• Gate Charge (qg) @ Vgs: 66nC @ 5V
• Input Capacitance (ciss) @ Vds: 2900pF @ 25V
• Power - Max: 130W
• Mounting Type: Surface Mount
• Package / Case: DPak, TO-252 (2 leads+tab), SC-63
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *IRLR3705Z

www.irf.com
1000
100
0.1
120
100
10
80
60
40
20
1
1.0E-06
0
Fig 16. Maximum Avalanche Energy
25
Duty Cycle = Single Pulse
Starting T J , Junction Temperature (°C)
50
vs. Temperature
0.01
0.05
0.10
TOP
BOTTOM 1% Duty Cycle
I D = 42A
75
1.0E-05
Fig 15. Typical Avalanche Current vs.Pulsewidth
100
Single Pulse
125
150
1.0E-04
175
tav (sec)
Notes on Repetitive Avalanche Curves , Figures 15, 16:
(For further info, see AN-1005 at www.irf.com)
1. Avalanche failures assumption:
2. Safe operation in Avalanche is allowed as long asT
3. Equation below based on circuit and waveforms shown in
4. P
5. BV = Rated breakdown voltage (1.3 factor accounts for
6. I
7. ∆T
Purely a thermal phenomenon and failure occurs at a
temperature far in excess of T
every part type.
not exceeded.
Figures 12a, 12b.
avalanche pulse.
voltage increase during avalanche).
T
t
D = Duty cycle in avalanche = t
Z
av
av =
thJC
D (ave)
jmax
= Allowable avalanche current.
=
Average time in avalanche.
(D, t
Allowable rise in junction temperature, not to exceed
(assumed as 25°C in Figure 15, 16).
= Average power dissipation per single
av
1.0E-03
P
) = Transient thermal resistance, see figure 11)
D (ave)
= 1/2 ( 1.3·BV·I
I
E
Allowed avalanche Current vs
avalanche
assuming ∆Tj = 25°C due to
avalanche losses. Note: In no
case should Tj be allowed to
exceed Tjmax
av
AS (AR)
= 2DT/ [1.3·BV·Z
= P
D (ave)
jmax
pulsewidth,
1.0E-02
av
av
. This is validated for
·f
) = DT/ Z
·t
th
av
]
thJC
tav
jmax
1.0E-01
7
is